CA2679170A1 - Synchronous spread-spectrum communications system and method - Google Patents

Synchronous spread-spectrum communications system and method

Info

Publication number
CA2679170A1
CA2679170A1 CA002679170A CA2679170A CA2679170A1 CA 2679170 A1 CA2679170 A1 CA 2679170A1 CA 002679170 A CA002679170 A CA 002679170A CA 2679170 A CA2679170 A CA 2679170A CA 2679170 A1 CA2679170 A1 CA 2679170A1
Authority
CA
Canada
Prior art keywords
signal
code signal
spread spectrum
despread
message
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
CA002679170A
Other languages
French (fr)
Other versions
CA2679170C (en
Inventor
Donald L. Schilling
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.)
InterDigital Technology Corp
Original Assignee
Interdigital Technology Corporation
Donald L. Schilling
Scs Mobilecom, Inc.
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24508972&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2679170(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Interdigital Technology Corporation, Donald L. Schilling, Scs Mobilecom, Inc. filed Critical Interdigital Technology Corporation
Priority claimed from CA002615665A external-priority patent/CA2615665C/en
Publication of CA2679170A1 publication Critical patent/CA2679170A1/en
Application granted granted Critical
Publication of CA2679170C publication Critical patent/CA2679170C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
    • H04B7/18547—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station

Abstract

Disclosed is method including receiving a spread spectrum signal, despreading the received spread spectrum signal using a reference code signal, as a despread reference code signal, despreading the received spread spectrum signal using at least one message code signal, as at least one despread message code signal and using the despread reference code signal as a phase reference for the despreading of the received spread spectrum signal using the at least one message code signal and recovering data from the at least one despread message code signal.

Claims (18)

1. A method comprising:
receiving a spread spectrum signal;
despreading the received spread spectrum signal using a reference code signal, as a despread reference code signal;
despreading the received spread spectrum signal using at least one message code signal, as at least one despread message code signal and using the despread reference code signal as a phase reference for the despreading of the received spread spectrum signal using the at least one message code signal;
and recovering data from the at least one despread message code signal.
2. The method of claim 1 wherein the at least one despread message code signal is a plurality of despread message code signals.
3. The method of claim 1 comprising recovering a carrier signal from the despreading using the reference code signal.
4. The method of claim 1 wherein the despread reference code signal has a known data bit sequence.
5. The method of claim 4 wherein the known data bit sequence is a code word.
6. The method of claim 1 wherein the reference code signal and the at least one message code signal are chip code signals.
7. A spread spectrum receiver comprising:
an input configured to receive a spread spectrum signal;
a reference despreading device configured to despread the received spread spectrum signal using a reference code signal, as a despread reference code signal;

a message despreading device configured to despread the received spread spectrum signal using at least one message code signal, as at least one despread message code signal and the message despreading device configured to have a phase reference derived from the despread reference code signal; and a data detector device configured to recover data from the at least one despread message code signal.
8. The spread spectrum receiver of claim 7 wherein the at least one despread message code signal is a plurality of despread message code signals.
9. The spread spectrum receiver of claim 7 wherein the reference despreading device is configured to recovering a carrier signal.
10. The spread spectrum receiver of claim 7 wherein the despread reference code signal has a known data bit sequence.
11. The spread spectrum receiver of claim 10 wherein the known data bit sequence is a code word.
12. The spread spectrum receiver of claim 7 wherein the reference code signal and the at least one message code signal are chip code signals.
13. A spread spectrum communication system comprising:
a spread spectrum transmitter comprising:
a reference code spreading device configured to produce a spread reference code signal using a reference code signal;
a message code spreading device configured to spread data using at least one message code signal, producing spread message code data;
a combining device configured to combine the spread reference code signal and the spread message code data, producing a combined signal;
a modulator configured to modulate the combined signal to radio frequency for transmission as a spread spectrum signal;
a spread spectrum receiver comprising:
an input configured to receive the spread spectrum signal;

a reference despreading device configured to despread the received spread spectrum signal using a replica reference code signal, as a despread reference code signal;
a message despreading device configured to despread the received spread spectrum signal using at least one replica message code signal, as at least one despread message code signal and the message despreading device configured to have a phase reference derived from the despread reference code signal; and a data detector device configured to recover data from the at least one despread message code signal.
14. The spread spectrum system of claim 13 wherein the at least one message code signal is a plurality of message code signals.
15. The spread spectrum system of claim 13 wherein the reference despreading device is configured to recovering a carrier signal.
16. The spread spectrum system of claim 13 wherein the despread reference code signal has a known data bit sequence.
17. The spread spectrum system of claim 16 wherein the known data bit sequence is a code word.
18. The spread spectrum system of claim 13 wherein the reference code signal and the at least one message code signal are chip code signals.
CA2679170A 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method Expired - Lifetime CA2679170C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/626,109 US5228056A (en) 1990-12-14 1990-12-14 Synchronous spread-spectrum communications system and method
US07/626,109 1990-12-14
CA002615665A CA2615665C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002615665A Division CA2615665C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method

Publications (2)

Publication Number Publication Date
CA2679170A1 true CA2679170A1 (en) 1992-06-15
CA2679170C CA2679170C (en) 2010-10-26

Family

ID=24508972

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2679170A Expired - Lifetime CA2679170C (en) 1990-12-14 1991-12-10 Synchronous spread-spectrum communications system and method
CA002091785A Expired - Lifetime CA2091785C (en) 1990-12-14 1991-12-10 Synchronous spread spectrum communications system and method

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002091785A Expired - Lifetime CA2091785C (en) 1990-12-14 1991-12-10 Synchronous spread spectrum communications system and method

Country Status (7)

Country Link
US (2) US5228056A (en)
EP (1) EP0515675B1 (en)
CA (2) CA2679170C (en)
DE (2) DE69129846T4 (en)
ES (1) ES2118811T4 (en)
SG (1) SG43895A1 (en)
WO (1) WO1992010892A1 (en)

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DE69129846D1 (en) 1998-08-27
US5420896A (en) 1995-05-30
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EP0515675A1 (en) 1992-12-02
ES2118811T3 (en) 1998-10-01
CA2091785A1 (en) 1992-06-15
CA2679170C (en) 2010-10-26
WO1992010892A1 (en) 1992-06-25
US5228056A (en) 1993-07-13
DE69129846T4 (en) 1999-07-29

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