WO1996034481A3 - Adaptive filter for use in a tdm/tdma receiver - Google Patents

Adaptive filter for use in a tdm/tdma receiver Download PDF

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Publication number
WO1996034481A3
WO1996034481A3 PCT/GB1996/000947 GB9600947W WO9634481A3 WO 1996034481 A3 WO1996034481 A3 WO 1996034481A3 GB 9600947 W GB9600947 W GB 9600947W WO 9634481 A3 WO9634481 A3 WO 9634481A3
Authority
WO
WIPO (PCT)
Prior art keywords
data packet
adaptive filter
tdm
time slot
filtering
Prior art date
Application number
PCT/GB1996/000947
Other languages
French (fr)
Other versions
WO1996034481A2 (en
Inventor
Paul William Rudkin
Original Assignee
Ionica Int Ltd
Paul William Rudkin
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 Ionica Int Ltd, Paul William Rudkin filed Critical Ionica Int Ltd
Priority to BR9604991A priority Critical patent/BR9604991A/en
Priority to JP8532247A priority patent/JPH11504178A/en
Priority to AU53421/96A priority patent/AU5342196A/en
Priority to EP96910121A priority patent/EP0823169A2/en
Publication of WO1996034481A2 publication Critical patent/WO1996034481A2/en
Publication of WO1996034481A3 publication Critical patent/WO1996034481A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03656—Initialisation
    • H04L2025/03668—Initialisation to the value at the end of a previous adaptation period
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/003—Correction of carrier offset at baseband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • 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
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines

Abstract

A demodulator for a receiver of digital data messages sent in predetermined time slots within fixed length time frames includes an adaptive filter operative on each received data packet to determine digital bit values and to adapt filter coefficients. Filter coefficient values upon filtering a data packet in a time slot are used as initial values in adaptive filtering the next received data packet in the corresponding time slot of the next frame.
PCT/GB1996/000947 1995-04-28 1996-04-19 Adaptive filter for use in a tdm/tdma receiver WO1996034481A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR9604991A BR9604991A (en) 1995-04-28 1996-04-19 Carrier phase recovery in a tdm / tdma receiver
JP8532247A JPH11504178A (en) 1995-04-28 1996-04-19 Carrier phase recovery in TDM / TDMA receiver
AU53421/96A AU5342196A (en) 1995-04-28 1996-04-19 Adaptive filter for use in a tdm/tdma receiver
EP96910121A EP0823169A2 (en) 1995-04-28 1996-04-19 Adaptive filter for use in a tdm/tdma receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9508661.7 1995-04-28
GBGB9508661.7A GB9508661D0 (en) 1995-04-28 1995-04-28 Adaptive filter

Publications (2)

Publication Number Publication Date
WO1996034481A2 WO1996034481A2 (en) 1996-10-31
WO1996034481A3 true WO1996034481A3 (en) 1996-11-28

Family

ID=10773682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/000947 WO1996034481A2 (en) 1995-04-28 1996-04-19 Adaptive filter for use in a tdm/tdma receiver

Country Status (9)

Country Link
EP (1) EP0823169A2 (en)
JP (1) JPH11504178A (en)
CN (1) CN1183192A (en)
AU (1) AU5342196A (en)
BR (1) BR9604991A (en)
GB (1) GB9508661D0 (en)
IL (1) IL118017A0 (en)
WO (1) WO1996034481A2 (en)
ZA (1) ZA963272B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9723216D0 (en) * 1997-11-03 1998-01-07 Wireless Systems Int Ltd Method of and apparatus for correcting a timing error in a sampled data system
AU9213398A (en) * 1997-12-12 1999-07-05 Thomson Consumer Electronics, Inc Tdma wireless telephone system with independently tracked demodulation parameters
FR2801753B1 (en) * 1999-11-25 2002-05-03 Groupe Ecoles Telecomm IMPROVEMENTS ON ADAPTIVE EQUALIZATION DEVICES FOR RECOVERIES OF DIGITAL COMMUNICATION SYSTEMS
FR2802371B1 (en) * 1999-12-10 2003-09-26 Matra Nortel Communications SIGNALING METHOD IN A RADIO COMMUNICATION SYSTEM, TRANSMITTERS, RECEIVERS AND REPEATERS FOR IMPLEMENTING THE METHOD
US6947477B2 (en) 2001-01-19 2005-09-20 Raze Technologies, Inc. Apparatus and method for creating signal and profiles at a receiving station
US7079574B2 (en) 2001-01-17 2006-07-18 Radiant Networks Plc Carrier phase recovery system for adaptive burst modems and link hopping radio networks
JP5692435B1 (en) 2014-02-27 2015-04-01 日本電気株式会社 Wireless communication system, wireless communication apparatus, and wireless communication method
CN114465688B (en) * 2021-10-27 2023-05-16 国芯科技(广州)有限公司 Frame synchronization system for shortening total calibration and synchronization time length

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238739A (en) * 1979-02-26 1980-12-09 E-Systems, Inc. Preset network for a phase lock loop
EP0106136A2 (en) * 1982-09-13 1984-04-25 Communications Satellite Corporation Digitally controlled transversal equalizer
WO1985004999A1 (en) * 1984-04-17 1985-11-07 Harris Corporation Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
US4583048A (en) * 1985-02-26 1986-04-15 Rca Corporation MSK digital demodulator for burst communications
JPH02183614A (en) * 1989-01-10 1990-07-18 Matsushita Electric Ind Co Ltd Adaptive type waveform equalizer
EP0639914A2 (en) * 1993-07-28 1995-02-22 Martin Marietta Corporation MSK phase acquisition and tracking method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238739A (en) * 1979-02-26 1980-12-09 E-Systems, Inc. Preset network for a phase lock loop
EP0106136A2 (en) * 1982-09-13 1984-04-25 Communications Satellite Corporation Digitally controlled transversal equalizer
WO1985004999A1 (en) * 1984-04-17 1985-11-07 Harris Corporation Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
US4583048A (en) * 1985-02-26 1986-04-15 Rca Corporation MSK digital demodulator for burst communications
JPH02183614A (en) * 1989-01-10 1990-07-18 Matsushita Electric Ind Co Ltd Adaptive type waveform equalizer
EP0639914A2 (en) * 1993-07-28 1995-02-22 Martin Marietta Corporation MSK phase acquisition and tracking method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 455 (E - 0985) 28 September 1990 (1990-09-28) *

Also Published As

Publication number Publication date
WO1996034481A2 (en) 1996-10-31
ZA963272B (en) 1997-10-24
EP0823169A2 (en) 1998-02-11
MX9708290A (en) 1998-06-28
CN1183192A (en) 1998-05-27
BR9604991A (en) 1999-06-01
AU5342196A (en) 1996-11-18
GB9508661D0 (en) 1995-06-14
IL118017A0 (en) 1996-08-04
JPH11504178A (en) 1999-04-06

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