CA2023821A1 - Spread spectrum communications system for networks - Google Patents

Spread spectrum communications system for networks

Info

Publication number
CA2023821A1
CA2023821A1 CA2023821A CA2023821A CA2023821A1 CA 2023821 A1 CA2023821 A1 CA 2023821A1 CA 2023821 A CA2023821 A CA 2023821A CA 2023821 A CA2023821 A CA 2023821A CA 2023821 A1 CA2023821 A1 CA 2023821A1
Authority
CA
Canada
Prior art keywords
spread spectrum
self
chirps
networks
communications system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2023821A
Other languages
French (fr)
Other versions
CA2023821C (en
Inventor
James E. Vander Mey
Timothy J. Vander Mey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Atheros Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2023821A1 publication Critical patent/CA2023821A1/en
Application granted granted Critical
Publication of CA2023821C publication Critical patent/CA2023821C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/103—Chirp modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/06—Speed or phase control by synchronisation signals the synchronisation signals differing from the information signals in amplitude, polarity or frequency or length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B2001/6912—Spread spectrum techniques using chirp
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5441—Wireless systems or telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5445—Local network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel

Abstract

Spread spectrum chirps (i.e., wideband frequency packets) are propagated on a local area network in a hostile communications environment, such as a powerline or a crowded radio frequency band. chirps are self-synchronizing, data bit (or subdata bit) in length and detectable by all network nodes, to allow the contention resolution and collision detection needed to support carrier-sense based network protocols. A matched filter of the same time length and encoding sequence as the transmitted chirp provides the self-synchronized chirp reception at each receiver.
CA002023821A 1989-08-23 1990-08-22 Spread spectrum communications system for networks Expired - Lifetime CA2023821C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/397,803 1989-08-23
US07/397,803 US5090024A (en) 1989-08-23 1989-08-23 Spread spectrum communications system for networks

Publications (2)

Publication Number Publication Date
CA2023821A1 true CA2023821A1 (en) 1991-02-24
CA2023821C CA2023821C (en) 2000-11-28

Family

ID=23572682

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002023821A Expired - Lifetime CA2023821C (en) 1989-08-23 1990-08-22 Spread spectrum communications system for networks

Country Status (6)

Country Link
US (3) US5090024A (en)
EP (1) EP0419047B1 (en)
JP (1) JP2828493B2 (en)
AU (1) AU647405B2 (en)
CA (1) CA2023821C (en)
DE (1) DE69034041T2 (en)

Families Citing this family (234)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056108A (en) * 1990-04-04 1991-10-08 Van Metre Lund Communication system
FI87615C (en) * 1991-04-05 1993-01-25 Nokia Mobile Phones Ltd Control system for a packet-linked CDMA data network
FI87616C (en) * 1991-04-05 1993-01-25 Nokia Mobile Phones Ltd Method for controlling the function of a packet switched CDMA data network for controlling the operation of the transmitters and receivers
CA2139227A1 (en) * 1992-07-31 1994-02-17 James E. Vander Mey Spread spectrum communication system particularly suited for rf network communication
US5289498A (en) * 1992-09-09 1994-02-22 Echelon Corporation Adaptive data recovery for spread spectrum systems
US5461629A (en) * 1992-09-09 1995-10-24 Echelon Corporation Error correction in a spread spectrum transceiver
US5533046A (en) * 1992-10-08 1996-07-02 Lund; Vanmetre Spread spectrum communication system
US5561351A (en) * 1992-10-14 1996-10-01 Diablo Research Corporation Dimmer for electrodeless discharge lamp
US5335248A (en) * 1993-06-17 1994-08-02 Rockwell International Corporation Apparatus for correlating multi-frequency signals
US5553081A (en) * 1994-04-08 1996-09-03 Echelon Corporation Apparatus and method for detecting a signal in a communications system
FR2719176B1 (en) * 1994-04-22 1996-06-14 Sgs Thomson Microelectronics System comprising a pricing change communication apparatus.
US5691715A (en) * 1994-06-22 1997-11-25 General Electric Company Method and apparatus for detecting fraudulent power line communications signal
US5963586A (en) 1994-09-09 1999-10-05 Omnipoint Corporation Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
US5953370A (en) 1994-09-09 1999-09-14 Omnipoint Corporation Apparatus for receiving and correlating a spread spectrum signal
US5881100A (en) 1994-09-09 1999-03-09 Omnipoint Corporation Method and apparatus for coherent correlation of a spread spectrum signal
US5754584A (en) 1994-09-09 1998-05-19 Omnipoint Corporation Non-coherent spread-spectrum continuous-phase modulation communication system
US5754585A (en) 1994-09-09 1998-05-19 Omnipoint Corporation Method and apparatus for serial noncoherent correlation of a spread spectrum signal
US5692007A (en) 1994-09-09 1997-11-25 Omnipoint Corporation Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation
US5757847A (en) 1994-09-09 1998-05-26 Omnipoint Corporation Method and apparatus for decoding a phase encoded signal
US5680414A (en) 1994-09-09 1997-10-21 Omnipoint Corporation Synchronization apparatus and method for spread spectrum receiver
US5797002A (en) * 1994-09-20 1998-08-18 Papyrus Technology Corp. Two-way wireless system for financial industry transactions
US5774877A (en) * 1994-09-20 1998-06-30 Papyrus Technology Corp. Two-way wireless system for financial industry transactions
US6768981B2 (en) 1994-09-20 2004-07-27 Papyrus Corporation Method for executing a cross-trade in a two-way wireless system
US7373322B1 (en) 1994-09-20 2008-05-13 Papyrus Technology Corporation Two-way wireless communication system for financial industry transactions
AU4006995A (en) * 1994-10-20 1996-05-15 Ies Technologies, Inc. Automated appliance control system
US5818821A (en) 1994-12-30 1998-10-06 Intelogis, Inc. Universal lan power line carrier repeater system and method
US5572438A (en) * 1995-01-05 1996-11-05 Teco Energy Management Services Engery management and building automation system
US5553072A (en) * 1995-01-30 1996-09-03 Northrop Grumman Corporation Communication apparatus and method
US5841808A (en) * 1995-03-23 1998-11-24 Mcdonnell Douglas Corporation Spread spectrum chip rate tracking system
US5745484A (en) * 1995-06-05 1998-04-28 Omnipoint Corporation Efficient communication system using time division multiplexing and timing adjustment control
US6356607B1 (en) 1995-06-05 2002-03-12 Omnipoint Corporation Preamble code structure and detection method and apparatus
US5726644A (en) * 1995-06-30 1998-03-10 Philips Electronics North America Corporation Lighting control system with packet hopping communication
US5898733A (en) * 1995-06-30 1999-04-27 Philips Electronics North America Corporation Packet hopping system with sliding frequency, and transciever for the system
JPH11510004A (en) * 1995-07-19 1999-08-31 フジツウ ネットワーク コミュニケーションズ，インコーポレイテッド Point-to-multipoint transmission using subqueues
US5805583A (en) * 1995-08-25 1998-09-08 Terayon Communication Systems Process for communicating multiple channels of digital data in distributed systems using synchronous code division multiple access
US5991308A (en) * 1995-08-25 1999-11-23 Terayon Communication Systems, Inc. Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant
US6665308B1 (en) 1995-08-25 2003-12-16 Terayon Communication Systems, Inc. Apparatus and method for equalization in distributed digital data transmission systems
US5793759A (en) * 1995-08-25 1998-08-11 Terayon Corporation Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes
US5768269A (en) * 1995-08-25 1998-06-16 Terayon Corporation Apparatus and method for establishing frame synchronization in distributed digital data communication systems
US6356555B1 (en) 1995-08-25 2002-03-12 Terayon Communications Systems, Inc. Apparatus and method for digital data transmission using orthogonal codes
US5745837A (en) * 1995-08-25 1998-04-28 Terayon Corporation Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA
US6307868B1 (en) 1995-08-25 2001-10-23 Terayon Communication Systems, Inc. Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops
WO1997010656A1 (en) * 1995-09-14 1997-03-20 Fujitsu Network Communications, Inc. Transmitter controlled flow control for buffer allocation in wide area atm networks
US5579335A (en) * 1995-09-27 1996-11-26 Echelon Corporation Split band processing for spread spectrum communications
EP0767544A3 (en) 1995-10-04 2002-02-27 Interuniversitair Micro-Elektronica Centrum Vzw Programmable modem using spread spectrum communication
US5872810A (en) * 1996-01-26 1999-02-16 Imec Co. Programmable modem apparatus for transmitting and receiving digital data, design method and use method for said modem
US5687190A (en) * 1995-10-20 1997-11-11 Otc Telecom Non-coherent direct sequence spread spectrum receiver for detecting bit/symbol chip sequences using threshold comparisons of chip sequence correlations
US6212566B1 (en) 1996-01-26 2001-04-03 Imec Interprocess communication protocol system modem
US7099949B1 (en) 1995-10-23 2006-08-29 Imec Vzw Interprocess communication protocol system
US6127939A (en) * 1996-10-14 2000-10-03 Vehicle Enhancement Systems, Inc. Systems and methods for monitoring and controlling tractor/trailer vehicle systems
US7449993B2 (en) * 1995-11-09 2008-11-11 Vehicle Enhancement Systems, Inc. System, apparatus and methods for data communication between vehicle and remote data communication terminal, between portions of vehicle and other portions of vehicle, between two or more vehicles, and between vehicle and communications network
US6111524A (en) * 1995-11-09 2000-08-29 Vehicle Enhancement Systems, Inc. Systems and methods for identifying tractor/trailers and components thereof
US6108368A (en) * 1995-12-29 2000-08-22 Echelon Corporation Adaptive reference pattern for spread spectrum detection claims
US5748671A (en) * 1995-12-29 1998-05-05 Echelon Corporation Adaptive reference pattern for spread spectrum detection
AU1697697A (en) * 1996-01-16 1997-08-11 Fujitsu Limited A reliable and flexible multicast mechanism for atm networks
US5872815A (en) * 1996-02-16 1999-02-16 Sarnoff Corporation Apparatus for generating timing signals for a digital television signal receiver
US5696762A (en) * 1996-03-25 1997-12-09 Stanford Telecommunications, Inc. Rapid-acquisition access channel scheme for CDMA systems
US5694108A (en) * 1996-05-01 1997-12-02 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US5949796A (en) 1996-06-19 1999-09-07 Kumar; Derek D. In-band on-channel digital broadcasting method and system
US5793820A (en) * 1996-07-10 1998-08-11 Intellon Corporation Automatic adaptive filtering according to frequency modulation rate
US5748104A (en) * 1996-07-11 1998-05-05 Qualcomm Incorporated Wireless remote telemetry system
US5892758A (en) * 1996-07-11 1999-04-06 Qualcomm Incorporated Concentrated subscriber wireless remote telemetry system
SE510890C2 (en) * 1996-08-02 1999-07-05 Ericsson Telefon Ab L M Method and device for broadband transmission
JP2798129B2 (en) * 1996-08-26 1998-09-17 日本電気株式会社 Transmitter and receiver for chirp spread spectrum signal multiplexer
US5748905A (en) * 1996-08-30 1998-05-05 Fujitsu Network Communications, Inc. Frame classification using classification keys
US6167120A (en) * 1996-11-06 2000-12-26 Lextron Systems, Inc. Apparatus and methods for home networking
US6141373A (en) 1996-11-15 2000-10-31 Omnipoint Corporation Preamble code structure and detection method and apparatus
JP3729366B2 (en) * 1996-11-29 2005-12-21 株式会社ゼネラル リサーチ オブ エレクトロニックス Clock recovery circuit for packet FSK receiver
US6243772B1 (en) * 1997-01-31 2001-06-05 Sharewave, Inc. Method and system for coupling a personal computer with an appliance unit via a wireless communication link to provide an output display presentation
US6282714B1 (en) 1997-01-31 2001-08-28 Sharewave, Inc. Digital wireless home computer system
US7046682B2 (en) * 1997-02-12 2006-05-16 Elster Electricity, Llc. Network-enabled, extensible metering system
US6396839B1 (en) * 1997-02-12 2002-05-28 Abb Automation Inc. Remote access to electronic meters using a TCP/IP protocol suite
US5777544A (en) * 1997-03-17 1998-07-07 Intellon Corporation Apparatus and method for controlling data communications having combination of wide and narrow band frequency protocols
US5978371A (en) * 1997-03-31 1999-11-02 Abb Power T&D Company Inc. Communications module base repeater
US6005894A (en) * 1997-04-04 1999-12-21 Kumar; Derek D. AM-compatible digital broadcasting method and system
US6671311B1 (en) 1997-06-20 2003-12-30 Itran Communications Ltd. Receiver for use in a code shift keying spread spectrum communications system
US6616254B1 (en) 1997-06-20 2003-09-09 Itran Communications Ltd. Code shift keying transmitter for use in a spread spectrum communications system
US6064695A (en) * 1997-06-20 2000-05-16 Itran Communications Ltd. Spread spectrum communication system utilizing differential code shift keying
US5933073A (en) * 1997-07-07 1999-08-03 Abb Power T&D Company Inc. Apparatus and methods for power network coupling
US6034988A (en) * 1997-08-04 2000-03-07 Intellon Corporation Spread spectrum apparatus and method for network RF data communications having extended communication channels
JP3335887B2 (en) * 1997-08-20 2002-10-21 松下電器産業株式会社 Spread spectrum demodulator and spread spectrum demodulation method
US6088659A (en) * 1997-09-11 2000-07-11 Abb Power T&D Company Inc. Automated meter reading system
US5924486A (en) * 1997-10-29 1999-07-20 Tecom, Inc. Environmental condition control and energy management system and method
US6700939B1 (en) * 1997-12-12 2004-03-02 Xtremespectrum, Inc. Ultra wide bandwidth spread-spectrum communications system
US7162730B1 (en) 1998-01-07 2007-01-09 Honeywell International, Inc. Information communication systems
US6070060A (en) * 1998-03-04 2000-05-30 Edelman; Seymour Frequency and frequency rate of change radio broadcasting and other types of communications systems
US6115468A (en) * 1998-03-26 2000-09-05 Cisco Technology, Inc. Power feed for Ethernet telephones via Ethernet link
WO1999053627A1 (en) 1998-04-10 1999-10-21 Chrimar Systems, Inc. Doing Business As Cms Technologies System for communicating with electronic equipment on a network
US6331996B1 (en) * 1998-05-28 2001-12-18 Lucent Technologies Inc. Channel synchronization and impulse sounding in the presence of frequency offset
JPH11346178A (en) * 1998-06-02 1999-12-14 Ibiden Sangyo Kk Device and method for communication using power line
US6480510B1 (en) 1998-07-28 2002-11-12 Serconet Ltd. Local area network of serial intelligent cells
US6798736B1 (en) * 1998-09-22 2004-09-28 Qualcomm Incorporated Method and apparatus for transmitting and receiving variable rate data
US6700902B1 (en) 1998-10-19 2004-03-02 Elster Electricity, Llc Method and system for improving wireless data packet delivery
AU2843200A (en) * 1998-11-24 2000-06-13 Hughes Electronics Corporation Synchronization in mobile satellite systems using dual-chirp waveform
US6266540B1 (en) * 1998-11-30 2001-07-24 Qualcomm Inc Control interface protocol for telephone sets for a satellite telephone system
US7346120B2 (en) * 1998-12-11 2008-03-18 Freescale Semiconductor Inc. Method and system for performing distance measuring and direction finding using ultrawide bandwidth transmissions
US6493405B1 (en) 1999-03-02 2002-12-10 Harris Corporation Correlator having enhanced memory for reference and input data
US6038271A (en) * 1999-03-02 2000-03-14 Harris Corporation Correlator with cascade data paths to facilitate expansion of correlator length
US6438182B1 (en) 1999-03-02 2002-08-20 Harris Corporation Correlator with serial-parallel partition
US6466613B1 (en) 1999-04-26 2002-10-15 Itran Communications Ltd. Communications transceiver utilizing a single filter
US6351246B1 (en) 1999-05-03 2002-02-26 Xtremespectrum, Inc. Planar ultra wide band antenna with integrated electronics
US6956826B1 (en) 1999-07-07 2005-10-18 Serconet Ltd. Local area network for distributing data communication, sensing and control signals
US6690677B1 (en) 1999-07-20 2004-02-10 Serconet Ltd. Network for telephony and data communication
ATE333729T1 (en) 1999-08-10 2006-08-15 Nanotron Technologies Gmbh TRANSMISSION METHOD WITH TRANSMITTER SIDE FREQUENCY AND TIME SPREADING
US6614864B1 (en) 1999-10-12 2003-09-02 Itran Communications Ltd. Apparatus for and method of adaptive synchronization in a spread spectrum communications receiver
US6604038B1 (en) 1999-11-09 2003-08-05 Power Talk, Inc. Apparatus, method, and computer program product for establishing a remote data link with a vehicle with minimal data transmission delay
MXPA02004971A (en) * 1999-11-17 2002-09-18 Vehicle Enhancement Sys Inc Method for data communication between a vehicle and a remote terminal.
SE520336C2 (en) * 1999-12-14 2003-06-24 Protan Invest Ltd Local cable TV network
US6690719B1 (en) 2000-02-14 2004-02-10 Itran Communications Ltd. Host to modem interface
SE521970C2 (en) * 2000-02-16 2003-12-23 Protan Invest Ltd Cable TV systems that generate logical signals based on comparison of detected energy levels in the system with a reference signal
US20020039388A1 (en) * 2000-02-29 2002-04-04 Smart Kevin J. High data-rate powerline network system and method
CN1309190C (en) * 2000-03-05 2007-04-04 伊特兰通信有限公司 Spread spectrum communication system utilizing differential code shift keying
US6496104B2 (en) 2000-03-15 2002-12-17 Current Technologies, L.L.C. System and method for communication via power lines using ultra-short pulses
US6344987B1 (en) * 2000-03-16 2002-02-05 Intel Corporation Method and apparatus for distributing power in high frequency alternating current and direct current
US6850553B1 (en) * 2000-03-17 2005-02-01 Harris Corporation Chirp slope multiple access
US6549616B1 (en) 2000-03-20 2003-04-15 Serconet Ltd. Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US20020056116A1 (en) * 2000-03-29 2002-05-09 Wesley Smith Home bus computer system and method
US6998962B2 (en) 2000-04-14 2006-02-14 Current Technologies, Llc Power line communication apparatus and method of using the same
US6842459B1 (en) 2000-04-19 2005-01-11 Serconet Ltd. Network combining wired and non-wired segments
US20020009125A1 (en) * 2000-06-12 2002-01-24 Shi Zhen Liang High bandwidth efficient spread spectrum modulation using chirp waveform
US7352770B1 (en) * 2000-08-04 2008-04-01 Intellon Corporation Media access control protocol with priority and contention-free intervals
AU2001282867A1 (en) 2000-08-07 2002-02-18 Xtremespectrum, Inc. Electrically small planar uwb antenna apparatus and system thereof
US6373377B1 (en) 2000-10-05 2002-04-16 Conexant Systems, Inc. Power supply with digital data coupling for power-line networking
US6804351B1 (en) 2000-11-09 2004-10-12 Cisco Technology, Inc. Method and apparatus for detecting a compatible phantom powered device using common mode signaling
SE519113C2 (en) * 2000-11-10 2003-01-14 Ericsson Telefon Ab L M Device for capturing data
US7447307B2 (en) * 2000-11-29 2008-11-04 Cisco Technology, Inc. Unpowered twisted pair loopback circuit for differential mode signaling
US6751236B1 (en) 2000-12-15 2004-06-15 Cisco Technology, Inc. Configurable channel associated signaling (“CAS”) line signaling using plain text strings
NO20006683D0 (en) * 2000-12-28 2000-12-28 Abb Research Ltd Procedure for time synchronization
US7010067B2 (en) 2001-01-12 2006-03-07 Renesas Technology America, Inc. Methods and apparatus for feature recognition time shift correlation
EP1371219A4 (en) 2001-02-14 2006-06-21 Current Tech Llc Data communication over a power line
US6937648B2 (en) * 2001-04-03 2005-08-30 Yitran Communications Ltd Equalizer for communication over noisy channels
DE10144877A1 (en) * 2001-09-12 2003-04-03 Bosch Gmbh Robert Seat occupancy detection sensor
DE10148866C1 (en) * 2001-10-04 2003-02-06 Bosch Gmbh Robert Restraining device for a vehicle uses wireless bi-directional data transmission to run a control device, sensors for sensing impact and a restraining mechanism.
US7646831B2 (en) * 2001-10-19 2010-01-12 Nokia Corporation Method and a device for controlling data extraction from a data stream containing at lease one data packet
US7224716B2 (en) * 2002-02-11 2007-05-29 Hypertag Communications, Inc. Communication methods and apparatus employing spread spectrum techniques and doppler-tolerant polyphase codes
US7199699B1 (en) 2002-02-19 2007-04-03 Current Technologies, Llc Facilitating communication with power line communication devices
CA2480551A1 (en) * 2002-03-28 2003-10-09 Robertshaw Controls Company Energy management system and method
US6867707B1 (en) 2002-04-24 2005-03-15 Elster Electricity, Llc Automated on-site meter registration confirmation using a portable, wireless computing device
US7119713B2 (en) * 2002-06-27 2006-10-10 Elster Electricity, Llc Dynamic self-configuring metering network
US20040113810A1 (en) * 2002-06-28 2004-06-17 Mason Robert T. Data collector for an automated meter reading system
US7076378B1 (en) 2002-11-13 2006-07-11 Current Technologies, Llc Device and method for providing power line characteristics and diagnostics
US7026730B1 (en) 2002-12-20 2006-04-11 Cisco Technology, Inc. Integrated connector unit
US6972688B2 (en) * 2003-01-28 2005-12-06 Gateway Inc. Power supply with modular integrated networking
IL154234A (en) 2003-01-30 2010-12-30 Mosaid Technologies Inc Method and system for providing dc power on local telephone lines
IL154921A (en) * 2003-03-13 2011-02-28 Mosaid Technologies Inc Telephone system having multiple distinct sources and accessories therefor
US7423992B2 (en) * 2003-04-16 2008-09-09 Sony Corporation Time slot and carrier frequency allocation in a network
US7308103B2 (en) 2003-05-08 2007-12-11 Current Technologies, Llc Power line communication device and method of using the same
US7366297B1 (en) 2003-05-21 2008-04-29 Cisco Technology, Inc. Method and system for converting alternating current to ethernet in-line power
US7061142B1 (en) 2003-05-28 2006-06-13 Cisco Technology, Inc. Inline power device detection
US7460467B1 (en) 2003-07-23 2008-12-02 Current Technologies, Llc Voice-over-IP network test device and method
US20070043478A1 (en) * 2003-07-28 2007-02-22 Ehlers Gregory A System and method of controlling an HVAC system
US8090857B2 (en) 2003-11-24 2012-01-03 Qualcomm Atheros, Inc. Medium access control layer that encapsulates data from a plurality of received data units into a plurality of independently transmittable blocks
EP1542227A1 (en) * 2003-12-11 2005-06-15 Deutsche Thomson-Brandt Gmbh Method and apparatus for transmitting watermark data bits using a spread spectrum, and for regaining watermark data bits embedded in a spread spectrum
IL159838A0 (en) 2004-01-13 2004-06-20 Yehuda Binder Information device
US7113134B1 (en) 2004-03-12 2006-09-26 Current Technologies, Llc Transformer antenna device and method of using the same
US7227350B2 (en) * 2004-03-18 2007-06-05 Elster Electricity, Llc Bias technique for electric utility meter
US7315162B2 (en) * 2004-03-18 2008-01-01 Elster Electricity, Llc Reducing power consumption of electrical meters
US7187906B2 (en) * 2004-04-26 2007-03-06 Elster Electricity, Llc Method and system for configurable qualification and registration in a fixed network automated meter reading system
US7239250B2 (en) * 2004-04-26 2007-07-03 Elster Electricity, Llc System and method for improved transmission of meter data
US7262709B2 (en) * 2004-04-26 2007-08-28 Elster Electricity, Llc System and method for efficient configuration in a fixed network automated meter reading system
US20050251403A1 (en) * 2004-05-10 2005-11-10 Elster Electricity, Llc. Mesh AMR network interconnecting to TCP/IP wireless mesh network
US20050251401A1 (en) * 2004-05-10 2005-11-10 Elster Electricity, Llc. Mesh AMR network interconnecting to mesh Wi-Fi network
US7603570B2 (en) 2004-05-13 2009-10-13 Cisco Technology, Inc. Power delivery over ethernet cables
US7142106B2 (en) * 2004-06-15 2006-11-28 Elster Electricity, Llc System and method of visualizing network layout and performance characteristics in a wireless network
JP4986385B2 (en) * 2004-08-11 2012-07-25 日揮触媒化成株式会社 Scale-like composite particles and cosmetics containing the same
US7474707B2 (en) * 2004-09-09 2009-01-06 Ibiquity Digital Corporation Bandwidth reduction of an FM broadcast signal using a baseband precompensation technique
US7742430B2 (en) * 2004-09-24 2010-06-22 Elster Electricity, Llc System for automated management of spontaneous node migration in a distributed fixed wireless network
US7176807B2 (en) * 2004-09-24 2007-02-13 Elster Electricity, Llc System for automatically enforcing a demand reset in a fixed network of electricity meters
US7702594B2 (en) * 2004-09-24 2010-04-20 Elster Electricity, Llc System and method for automated configuration of meters
US7170425B2 (en) * 2004-09-24 2007-01-30 Elster Electricity, Llc System and method for creating multiple operating territories within a meter reading system
US7373528B2 (en) * 2004-11-24 2008-05-13 Cisco Technology, Inc. Increased power for power over Ethernet applications
US7345998B2 (en) * 2004-12-15 2008-03-18 Smart Labs, Inc. Mesh network of intelligent devices communicating via powerline and radio frequency
US7327998B2 (en) * 2004-12-22 2008-02-05 Elster Electricity, Llc System and method of providing a geographic view of nodes in a wireless network
US7509505B2 (en) * 2005-01-04 2009-03-24 Cisco Technology, Inc. Method and system for managing power delivery for power over Ethernet systems
US20060206433A1 (en) * 2005-03-11 2006-09-14 Elster Electricity, Llc. Secure and authenticated delivery of data from an automated meter reading system
US8223880B2 (en) * 2005-03-16 2012-07-17 Analog Devices, B.V. System and method for power line communication
US7308370B2 (en) 2005-03-22 2007-12-11 Elster Electricity Llc Using a fixed network wireless data collection system to improve utility responsiveness to power outages
US20060224335A1 (en) * 2005-03-29 2006-10-05 Elster Electricity, Llc Collecting interval data from a relative time battery powered automated meter reading devices
US8175190B2 (en) 2005-07-27 2012-05-08 Qualcomm Atheros, Inc. Managing spectra of modulated signals in a communication network
US7558294B2 (en) * 2005-07-27 2009-07-07 Intellon Corporation Time synchronization in a network
US7495578B2 (en) * 2005-09-02 2009-02-24 Elster Electricity, Llc Multipurpose interface for an automated meter reading device
US7308369B2 (en) * 2005-09-28 2007-12-11 Elster Electricity Llc Ensuring automatic season change demand resets in a mesh type network of telemetry devices
US7808985B2 (en) * 2006-11-21 2010-10-05 Gigle Networks Sl Network repeater
US8213895B2 (en) * 2005-10-03 2012-07-03 Broadcom Europe Limited Multi-wideband communications over multiple mediums within a network
EP1770870B1 (en) * 2005-10-03 2019-04-03 Avago Technologies International Sales Pte. Limited Powerline communication device and method
US8406239B2 (en) * 2005-10-03 2013-03-26 Broadcom Corporation Multi-wideband communications over multiple mediums
US20080159358A1 (en) * 2007-01-02 2008-07-03 David Ruiz Unknown Destination Traffic Repetition
US20070076666A1 (en) * 2005-10-03 2007-04-05 Riveiro Juan C Multi-Wideband Communications over Power Lines
US20070147268A1 (en) * 2005-12-23 2007-06-28 Elster Electricity, Llc Distributing overall control of mesh AMR LAN networks to WAN interconnected collectors
US7427927B2 (en) * 2006-02-16 2008-09-23 Elster Electricity, Llc In-home display communicates with a fixed network meter reading system
US7545285B2 (en) * 2006-02-16 2009-06-09 Elster Electricity, Llc Load control unit in communication with a fixed network meter reading system
WO2008032225A2 (en) * 2006-03-21 2008-03-20 Ranco Incorporated Of Delaware Refrigeration monitor unit
US8681671B1 (en) * 2006-04-25 2014-03-25 Cisco Technology, Inc. System and method for reducing power used for radio transmission and reception
US8175073B1 (en) 2006-04-25 2012-05-08 Cisco Technology, Inc. System and method for adjusting power used in reception in a wireless packet network
US7558349B2 (en) 2006-04-27 2009-07-07 Audio Precision, Inc. Method and apparatus for measuring characteristics of a multi-channel system in the presence of crosstalk
US7860146B2 (en) * 2006-07-06 2010-12-28 Gigle Networks, Inc. Adaptative multi-carrier code division multiple access
US8885814B2 (en) * 2006-07-25 2014-11-11 Broadcom Europe Limited Feedback impedance control for driving a signal
US8213582B2 (en) * 2008-03-14 2012-07-03 Broadcom Europe Limited Coupling signal processing circuitry with a wireline communications medium
US9705562B2 (en) * 2006-07-25 2017-07-11 Broadcom Europe Limited Dual transformer communication interface
US7886338B2 (en) * 2006-10-06 2011-02-08 Control4 Corporation System and method for controlling access to local services without losing failover capibilty
US8073384B2 (en) * 2006-12-14 2011-12-06 Elster Electricity, Llc Optimization of redundancy and throughput in an automated meter data collection system using a wireless network
US8107946B2 (en) * 2007-02-22 2012-01-31 Control4 Corporation System and method for using a wired network to send response messages in an automation system
US8436943B2 (en) * 2007-03-22 2013-05-07 Control4 Corporation System and method for automated audio visual system control
US20080238668A1 (en) * 2007-03-28 2008-10-02 Control4 Corporation System and method for security monitoring between trusted neighbors
US20100321151A1 (en) * 2007-04-04 2010-12-23 Control4 Corporation Home automation security system and method
US8588103B2 (en) * 2007-04-10 2013-11-19 Control4 Corporation System and method for distributing communications through a dense mesh network
US8320302B2 (en) * 2007-04-20 2012-11-27 Elster Electricity, Llc Over the air microcontroller flash memory updates
US8429406B2 (en) 2007-06-04 2013-04-23 Qualcomm Atheros, Inc. Authorizing customer premise equipment into a network
US10877623B2 (en) 2007-06-18 2020-12-29 Wirepath Home Systems, Llc Dynamic interface for remote control of a home automation network
WO2009082761A1 (en) 2007-12-26 2009-07-02 Elster Electricity, Llc. Optimized data collection in a wireless fixed network metering system
US8525692B2 (en) * 2008-06-13 2013-09-03 Elster Solutions, Llc Techniques for limiting demand from an electricity meter with an installed relay
US7602220B1 (en) 2008-06-24 2009-10-13 Gigle Semiconductor, Ltd. Resistor-input transconductor including common-mode compensation
US7795973B2 (en) 2008-10-13 2010-09-14 Gigle Networks Ltd. Programmable gain amplifier
US7956689B2 (en) * 2008-10-13 2011-06-07 Broadcom Corporation Programmable gain amplifier and transconductance compensation system
US8203463B2 (en) 2009-02-13 2012-06-19 Elster Electricity Llc Wakeup and interrogation of meter-reading devices using licensed narrowband and unlicensed wideband radio communication
US8675651B2 (en) * 2010-01-18 2014-03-18 Qualcomm Incorporated Coexistence mechanism for non-compatible powerline communication devices
US9142961B1 (en) 2010-09-10 2015-09-22 The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Apparatus and method for communication over power lines
US8644166B2 (en) 2011-06-03 2014-02-04 Asoka Usa Corporation Sensor having an integrated Zigbee® device for communication with Zigbee® enabled appliances to control and monitor Zigbee® enabled appliances
US8755946B2 (en) 2011-02-22 2014-06-17 Asoka Usa Corporation Method and apparatus for using PLC-based sensor units for communication and streaming media delivery, and for monitoring and control of power usage of connected appliances
US9736789B2 (en) * 2011-02-22 2017-08-15 Asoka Usa Corporation Power line communication-based local hotspot with wireless power control capability
US9257842B2 (en) 2011-02-22 2016-02-09 Asoka Usa Corporation Set-top-box having a built-in master node that provides an external interface for communication and control in a power-line-based residential communication system
US8364326B2 (en) * 2011-02-22 2013-01-29 Asoka Usa Corporation Set of sensor units for communication enabled for streaming media delivery with monitoring and control of power usage of connected appliances
GB2490140B (en) * 2011-04-19 2018-01-31 Qualcomm Technologies Int Ltd Chirp communications
US20130049414A1 (en) 2011-08-26 2013-02-28 Tonia Walstad Miller Furniture having load-bearing or non-load bearing structures for storage of water or other material
US20130051268A1 (en) * 2011-08-29 2013-02-28 Texas Instruments Incorporated Carrier Sense Multiple Access (CSMA) and Collision Detection for Power Line Communications (PLC) Using a Noise Model
US8718119B2 (en) 2011-11-10 2014-05-06 Raytheon Company Spread-carrier self-detecting code receiver with summed delay processing and methods for signal acquisition and detection
US9232615B2 (en) 2012-07-03 2016-01-05 Smartlabs, Inc. Simulcast mesh dimmable illumination source
WO2014201440A1 (en) 2013-06-14 2014-12-18 Lockheed Martin Corporation System, method and apparatus for communication that is insensitive to a sampling clock error
US9300484B1 (en) 2013-07-12 2016-03-29 Smartlabs, Inc. Acknowledgement as a propagation of messages in a simulcast mesh network
US9094107B1 (en) 2014-04-03 2015-07-28 Rajendra Kumar Orthogonal frequency chirp multiple accessing systems and methods
CN104199016B (en) * 2014-09-12 2016-09-07 四川九洲电器集团有限责任公司 Wireless distance finding method based on CSS technology and CSS wireless terminal
US9432079B1 (en) 2015-06-10 2016-08-30 Rajendra Kumar Frequency hopped frequency modulation spread spectrum (FHFMSS) multiple accessing communication systems and methods
US11149543B2 (en) 2017-12-07 2021-10-19 Halliburton Energy Services, Inc. Digital baseband communication on power line downhole
US10778282B1 (en) * 2019-05-07 2020-09-15 Cisco Technology, Inc. Methods for improving flexibility and data rate of chirp spread spectrum systems in LoRaWAN

Family Cites Families (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665474A (en) * 1966-08-19 1972-05-23 Amscat Corp High density communications system
US3691464A (en) * 1968-11-25 1972-09-12 Technical Communications Corp Asynchronous, swept frequency communication system
US4244053A (en) * 1970-09-10 1981-01-06 The United States Of America As Represented By The Secretary Of The Air Force Privacy communication method and system
US4037159A (en) * 1974-11-01 1977-07-19 Harris Corporation Chirp communication system
GB1565203A (en) * 1975-07-25 1980-04-16 Pico Electronics Ltd Remote control systems
US4200862A (en) * 1977-01-07 1980-04-29 Pico Electronics Limited Appliance control
CH604409A5 (en) * 1977-05-17 1978-09-15 Landis & Gyr Ag
US4100498A (en) * 1977-06-20 1978-07-11 The United States Of America As Represented By The Secretary Of The Navy Discrete chirp frequency synthesizer
DE2952785A1 (en) * 1979-01-03 1980-07-17 Plessey Handel Investment Ag RECEIVER FOR A MESSAGE TRANSMISSION SYSTEM WORKING WITH EXPANDED SIGNAL SPECTRUM
US4377754A (en) * 1980-03-05 1983-03-22 Pico Electronics Limited Switching circuit for a remote control system
GB2094598B (en) * 1981-02-26 1985-03-27 Sangamo Weston Transmission systems for transmitting signals over power distribution networks and transmitters for use therein
US4409592A (en) * 1981-04-20 1983-10-11 Hunt V Bruce Multipoint packet data communication system using random access and collision detection techniques
US4438519A (en) * 1981-05-04 1984-03-20 General Electric Company Methods, and apparatus, for transmitting high-bit-rate digital data in power line communication media having high harmonic noise content
US4468792A (en) * 1981-09-14 1984-08-28 General Electric Company Method and apparatus for data transmission using chirped frequency-shift-keying modulation
DE3277957D1 (en) * 1981-10-26 1988-02-11 Pico Electronics Ltd Electrical appliance control
US4409593A (en) * 1982-01-11 1983-10-11 General Electric Company Threshold-less collision detection and bit arbitration in a CFSK data system
EP0085753A1 (en) * 1982-02-05 1983-08-17 LGZ LANDIS & GYR ZUG AG System for the transmission of digital signal pulses over the lines of an A.C. distribution network
DE3377886D1 (en) * 1982-03-10 1988-10-06 Emi Ltd Improvements relating to communication over noisy lines
US4638299A (en) * 1982-04-06 1987-01-20 Pico Electronics Limited Electrical appliance control
US4608559A (en) * 1982-08-19 1986-08-26 Computer Automation, Inc. Local modulated carrier data network with a collision avoidance protocol
US4649549A (en) * 1983-08-30 1987-03-10 Sophisticated Signals And Circuits Apparatus for synchronizing linear PN sequences
US4707839A (en) * 1983-09-26 1987-11-17 Harris Corporation Spread spectrum correlator for recovering CCSK data from a PN spread MSK waveform
US4641322A (en) * 1983-10-18 1987-02-03 Nec Corporation System for carrying out spread spectrum communication through an electric power line
US4653076A (en) * 1984-03-23 1987-03-24 Sangamo Weston, Inc. Timing signal correction system for use in direct sequence spread signal receiver
JPS60220635A (en) * 1984-04-17 1985-11-05 Clarion Co Ltd Spread spectrum transmitter and receiver
US4656642A (en) * 1984-04-18 1987-04-07 Sanders Associates, Inc. Spread-spectrum detection system for a multi-element antenna
JPS6193746A (en) * 1984-10-12 1986-05-12 Sony Corp Spread spectrum communication demodulator
GB2171576B (en) * 1985-02-04 1989-07-12 Mitel Telecom Ltd Spread spectrum leaky feeder communication system
FR2577733B1 (en) * 1985-02-14 1988-03-25 Enertec METHOD AND SYSTEM FOR SPREAD BAND TRANSMISSION, IN PARTICULAR FOR TRANSMITTING INFORMATION OVER AN ELECTRIC POWER DISTRIBUTION NETWORK
EP0195573B1 (en) * 1985-03-15 1990-10-24 THORN EMI Patents Limited Spread-spectrum signal generator
US4755792A (en) * 1985-06-13 1988-07-05 Black & Decker Inc. Security control system
CA1278060C (en) * 1985-07-24 1990-12-18 Kaoru Endo Spread spectrum power line communications
US4682324A (en) * 1985-10-11 1987-07-21 General Electric Company Implicit preemptive lan
JPS62107542A (en) * 1985-11-05 1987-05-18 Nec Corp Radio communication system
US4724435A (en) * 1985-11-06 1988-02-09 Applied Spectrum Technologies, Inc. Bi-directional data telemetry system
US4703474A (en) * 1986-02-28 1987-10-27 American Telephone And Telegraph Company, At&T Bell Laboratories Spread spectrum code-division-multiple-access (SS-CDMA) lightwave communication system
JPS6397033A (en) * 1986-10-14 1988-04-27 Kenwood Corp Synchronizing pulse generation circuit for spread spectrum communication system
JPS63114333A (en) * 1986-10-31 1988-05-19 Nec Home Electronics Ltd Radio bus system
JPS63206034A (en) * 1987-02-21 1988-08-25 Jiyuurou Takase Asynchronous multiplex communication system in common use of frequency time division
JPS6484933A (en) * 1987-09-26 1989-03-30 Kenwood Corp Receiver
JPH01208042A (en) * 1988-02-15 1989-08-22 Nippon Telegr & Teleph Corp <Ntt> Frequency conversion transmission equipment
CH676179A5 (en) * 1988-09-29 1990-12-14 Ascom Zelcom Ag
US4969159A (en) * 1989-03-22 1990-11-06 Harris Corporation Spread spectrum communication system employing composite spreading codes with matched filter demodulator
US4975926A (en) * 1989-03-30 1990-12-04 Guenther Knapp Wireless indoor data communication system
DE69033552T2 (en) * 1989-12-22 2001-02-08 Nippon Denki Home Electronics Transmission system with code shift modulation

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US5574748A (en) 1996-11-12
US5090024A (en) 1992-02-18
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CA2023821C (en) 2000-11-28
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AU647405B2 (en) 1994-03-24
US5359625A (en) 1994-10-25
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JPH03143043A (en) 1991-06-18
AU6103590A (en) 1991-02-28
EP0419047B1 (en) 2003-02-12

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