CA2077343A1 - Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system - Google Patents

Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system

Info

Publication number
CA2077343A1
CA2077343A1 CA2077343A CA2077343A CA2077343A1 CA 2077343 A1 CA2077343 A1 CA 2077343A1 CA 2077343 A CA2077343 A CA 2077343A CA 2077343 A CA2077343 A CA 2077343A CA 2077343 A1 CA2077343 A1 CA 2077343A1
Authority
CA
Canada
Prior art keywords
transmitter
predetermined
subsequently
received data
rate
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
CA2077343A
Other languages
French (fr)
Other versions
CA2077343C (en
Inventor
Eugene J. Bruckert
Vedat Eyuboglu
David D. Falconer
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.)
Motorola Mobility LLC
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 CA2077343A1 publication Critical patent/CA2077343A1/en
Application granted granted Critical
Publication of CA2077343C publication Critical patent/CA2077343C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/27—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques
    • H03M13/2703—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques the interleaver involving at least two directions
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/27—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques
    • H03M13/2732—Convolutional interleaver; Interleavers using shift-registers or delay lines like, e.g. Ramsey type interleaver
    • 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
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Abstract

A method and apparatus is provided for transmitting spread spectrum signals. The transmitter receives data bits (200) at a particular rate. Subsequently, the transmitter encodes (202) the received data bits (200) at a predetermined encoding rate into data symbols (204).
Subsequently, the transmitter derives (210) predetermined length orthogonal codes (212) from the data symbols (208). The transmitter accommodates variable received data bit rates by setting the predetermined encoding rate and the predetermined orthogonal code length in response to the received data bit rate. Subsequently, the transmitter spreads (216) the derived orthogonal codes (212) with a user PN spreading code (214).
An alternative method and apparatus is provided for transmitting spread spectrum signals. The transmitter receives data bits (230) at a particular rate. Subsequently, the transmitter encodes (232) the received data bits (230) at a predetermined encoding rate into data symbols (234). Subsequently, the transmitter determines (248) a particular channel to transmit the data symbols (244) by spreading (248) the data symbols (244) with a predetermined length orthogonal code (246). The transmitter accommodates variable received data bit rates by setting the predetermined encoding rate and the predetermined orthogonal code length in response to the received data bit rate.
CA002077343A 1991-03-13 1992-02-13 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system Expired - Lifetime CA2077343C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/669,127 US5204876A (en) 1991-03-13 1991-03-13 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
US669,127 1991-03-13

Publications (2)

Publication Number Publication Date
CA2077343A1 true CA2077343A1 (en) 1992-09-14
CA2077343C CA2077343C (en) 1998-08-18

Family

ID=24685146

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002077343A Expired - Lifetime CA2077343C (en) 1991-03-13 1992-02-13 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system

Country Status (8)

Country Link
US (1) US5204876A (en)
EP (1) EP0529051B1 (en)
JP (1) JP2632596B2 (en)
KR (1) KR960000460B1 (en)
CA (1) CA2077343C (en)
DE (1) DE69230710T2 (en)
IL (1) IL101044A (en)
WO (1) WO1992017011A1 (en)

Families Citing this family (118)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7606575B2 (en) * 1988-08-04 2009-10-20 Broadcom Corporation Remote radio data communication system with data rate switching
US20010050943A1 (en) * 1989-08-03 2001-12-13 Mahany Ronald L. Radio frequency communication network having adaptive communication parameters
US5235614A (en) * 1991-03-13 1993-08-10 Motorola, Inc. Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system
US5210770A (en) * 1991-09-27 1993-05-11 Lockheed Missiles & Space Company, Inc. Multiple-signal spread-spectrum transceiver
US5335246A (en) * 1992-08-20 1994-08-02 Nexus Telecommunication Systems, Ltd. Pager with reverse paging facility
US5430759A (en) * 1992-08-20 1995-07-04 Nexus 1994 Limited Low-power frequency-hopped spread spectrum reverse paging system
US5668795A (en) * 1992-11-24 1997-09-16 Stanford Telecommunications, Inc. Modulation system for spread spectrum CDMA communiction
US5341396A (en) * 1993-03-02 1994-08-23 The Boeing Company Multi-rate spread system
US7924783B1 (en) * 1994-05-06 2011-04-12 Broadcom Corporation Hierarchical communications system
US5442627A (en) * 1993-06-24 1995-08-15 Qualcomm Incorporated Noncoherent receiver employing a dual-maxima metric generation process
US5530452A (en) * 1993-10-21 1996-06-25 Nexus Telecommunication Systems Ltd. Method of synchronizing spread spectrum radio transmitters
JP2526510B2 (en) * 1993-10-22 1996-08-21 日本電気株式会社 Wireless data communication device
ATE271293T1 (en) * 1993-11-01 2004-07-15 Qualcomm Inc METHOD AND DEVICE FOR TRANSMITTING VARIABLE RATE DIGITAL DATA
US5383219A (en) * 1993-11-22 1995-01-17 Qualcomm Incorporated Fast forward link power control in a code division multiple access system
US5454009A (en) * 1994-01-13 1995-09-26 Scientific-Atlanta, Inc. Method and apparatus for providing energy dispersal using frequency diversity in a satellite communications system
SG52170A1 (en) 1994-02-17 1998-09-28 Micrilor Inc A high-data-rate wireless local-area network
JP3779320B2 (en) * 1994-02-17 2006-05-24 モトローラ・インコーポレイテッド Method and apparatus for group coding signals
US5515396A (en) * 1994-02-25 1996-05-07 Motorola, Inc. Method and apparatus for selecting a spreading code in a spectrum spread communication system
GB2287379B (en) * 1994-03-10 1998-06-10 Roke Manor Research Apparatus for use in a mobile radio system
US5497395A (en) * 1994-04-04 1996-03-05 Qualcomm Incorporated Method and apparatus for modulating signal waveforms in a CDMA communication system
CA2145566C (en) * 1994-04-29 1999-12-28 Nambirajan Seshadri Methods of and devices for enhancing communications that use spread spectrum technology
US5546420A (en) * 1994-04-29 1996-08-13 At&T Corp. Methods of and devices for enhancing communications that use spread spectrum technology by using variable code techniques
US5751739A (en) * 1994-04-29 1998-05-12 Lucent Technologies, Inc. Methods of and devices for enhancing communications that use spread spectrum technology
US5603096A (en) * 1994-07-11 1997-02-11 Qualcomm Incorporated Reverse link, closed loop power control in a code division multiple access system
US5987014A (en) * 1994-07-14 1999-11-16 Stanford Telecommunications, Inc. Multipath resistant, orthogonal code-division multiple access system
US5822318A (en) * 1994-07-29 1998-10-13 Qualcomm Incorporated Method and apparatus for controlling power in a variable rate communication system
US5822359A (en) * 1994-10-17 1998-10-13 Motorola, Inc. Coherent random access channel in a spread-spectrum communication system and method
US5574721A (en) * 1994-12-09 1996-11-12 Stanford Telecommunications, Inc. Orthogonal code tracking system having phantom carrier signal
CN1075302C (en) * 1994-12-28 2001-11-21 Ntt移动通信网株式会社 Transmitting device and method in CDMA transmitting system
DE69633891T3 (en) * 1995-02-23 2011-03-17 Ntt Docomo Inc. METHOD FOR TRANSMITTING VARIABLE BITRATES AND THIS USING TRANSMITTER AND RECEIVER
US6977967B1 (en) 1995-03-31 2005-12-20 Qualcomm Incorporated Method and apparatus for performing fast power control in a mobile communication system
TW347616B (en) 1995-03-31 1998-12-11 Qualcomm Inc Method and apparatus for performing fast power control in a mobile communication system a method and apparatus for controlling transmission power in a mobile communication system is disclosed.
FI100569B (en) 1995-05-08 1997-12-31 Nokia Telecommunications Oy Method and apparatus for variable rate coding and detection in a multipurpose mobile communication system
US5898710A (en) * 1995-06-06 1999-04-27 Globespan Technologies, Inc. Implied interleaving, a family of systematic interleavers and deinterleavers
US6697350B2 (en) 1995-06-30 2004-02-24 Interdigital Technology Corporation Adaptive vector correlator for spread-spectrum communications
US6831905B1 (en) 1995-06-30 2004-12-14 Interdigital Technology Corporation Spread spectrum system assigning information signals to message-code signals
US6788662B2 (en) 1995-06-30 2004-09-07 Interdigital Technology Corporation Method for adaptive reverse power control for spread-spectrum communications
ZA965340B (en) 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
US7123600B2 (en) * 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
US7929498B2 (en) 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6885652B1 (en) 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US6940840B2 (en) 1995-06-30 2005-09-06 Interdigital Technology Corporation Apparatus for adaptive reverse power control for spread-spectrum communications
US6816473B2 (en) 1995-06-30 2004-11-09 Interdigital Technology Corporation Method for adaptive forward power control for spread-spectrum communications
US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial power control for spread-spectrum communications
US6132306A (en) * 1995-09-06 2000-10-17 Cisco Systems, Inc. Cellular communication system with dedicated repeater channels
US6052408A (en) * 1995-09-06 2000-04-18 Aironet Wireless Communications, Inc. Cellular communication system with dynamically modified data transmission parameters
US6128512A (en) * 1995-09-06 2000-10-03 Cisco Systems, Inc. Cellular communication system with dedicated repeater channels
US5950124A (en) * 1995-09-06 1999-09-07 Telxon Corporation Cellular communication system with dynamically modified data transmission parameters
FI955113A (en) * 1995-10-26 1997-04-27 Nokia Mobile Phones Ltd Procedure for data communication, transmitters and receivers
US5781583A (en) * 1996-01-19 1998-07-14 Motorola, Inc. Method and system for communication over multiple channels in a spread spectrum communication system
EP0825737B1 (en) * 1996-03-05 2007-05-02 NTT DoCoMo, Inc. Signal transmission method, transmitter and receiver in mobile communication system
JP3385299B2 (en) * 1996-05-20 2003-03-10 三菱電機株式会社 Spread spectrum communication equipment
US6396804B2 (en) 1996-05-28 2002-05-28 Qualcomm Incorporated High data rate CDMA wireless communication system
US5926500A (en) * 1996-05-28 1999-07-20 Qualcomm Incorporated Reduced peak-to-average transmit power high data rate CDMA wireless communication system
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
US5930230A (en) 1996-05-28 1999-07-27 Qualcomm Incorporated High data rate CDMA wireless communication system
KR100498752B1 (en) 1996-09-02 2005-11-08 소니 가부시끼 가이샤 Apparatus and method for receiving data using bit metrics
US5893035A (en) * 1996-09-16 1999-04-06 Qualcomm Incorporated Centralized forward link power control
US6154499A (en) * 1996-10-21 2000-11-28 Comsat Corporation Communication systems using nested coder and compatible channel coding
US5960361A (en) * 1996-10-22 1999-09-28 Qualcomm Incorporated Method and apparatus for performing a fast downward move in a cellular telephone forward link power control system
US6075974A (en) * 1996-11-20 2000-06-13 Qualcomm Inc. Method and apparatus for adjusting thresholds and measurements of received signals by anticipating power control commands yet to be executed
US5892774A (en) * 1996-12-12 1999-04-06 Qualcomm Incorporated Phase shift encoded subchannel
US6173007B1 (en) * 1997-01-15 2001-01-09 Qualcomm Inc. High-data-rate supplemental channel for CDMA telecommunications system
USRE39177E1 (en) * 1997-01-29 2006-07-11 Qualcomm, Inc. Method and apparatus for performing soft hand-off in a wireless communication system
US6151502A (en) * 1997-01-29 2000-11-21 Qualcomm Incorporated Method and apparatus for performing soft hand-off in a wireless communication system
US5933781A (en) * 1997-01-31 1999-08-03 Qualcomm Incorporated Pilot based, reversed channel power control
US5987326A (en) * 1997-02-11 1999-11-16 Qualcomm Incorporated Transmit power reduction for a high speed CDMA link in soft handoff
US5991284A (en) 1997-02-13 1999-11-23 Qualcomm Inc. Subchannel control loop
JP3884774B2 (en) 1997-04-17 2007-02-21 株式会社エヌ・ティ・ティ・ドコモ Base station apparatus in mobile communication system
US6396867B1 (en) * 1997-04-25 2002-05-28 Qualcomm Incorporated Method and apparatus for forward link power control
EP2278727B1 (en) * 1997-05-14 2018-09-26 Qualcomm Incorporated A subscriber unit and method for use in a wireless communication system
EP1965521B1 (en) 1997-05-16 2013-11-20 NTT DoCoMo, Inc. Variable rate transmission method and reception methods, and variable rate transmission and reception devices
EP1612959B1 (en) * 1997-06-17 2009-12-30 QUALCOMM Incorporated Reduced peak-to-average amplitude multichannel link
US5982760A (en) * 1997-06-20 1999-11-09 Qualcomm Inc. Method and apparatus for power adaptation control in closed-loop communications
CN1196288C (en) 1997-06-20 2005-04-06 三菱电机株式会社 Method and device for variable-speed transmission
US6426960B2 (en) 1997-06-24 2002-07-30 Qualcomm Incorporated Increased capacity data transmission in a CDMA wireless communication system
US6222875B1 (en) 1997-07-11 2001-04-24 Telefonaktiebolaget Lm Ericsson (Publ) Low-delay rate detection for variable rate communication systems
US6055428A (en) * 1997-07-21 2000-04-25 Qualcomm Incorporated Method and apparatus for performing soft hand-off in a wireless communication system
KR100387078B1 (en) * 1997-07-30 2003-10-22 삼성전자주식회사 Apparatus and method for puncturing and recovering symbol in band-spreading communication system
US6188678B1 (en) 1997-08-07 2001-02-13 Qualcomm Inc. Method and apparatus for adaptive closed loop power control using open loop measurements
US6147981A (en) * 1997-08-07 2000-11-14 Qualcomm Incorporated Method and apparatus for predictive parameter control with loop delay
US6070085A (en) 1997-08-12 2000-05-30 Qualcomm Inc. Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers
US6097972A (en) * 1997-08-29 2000-08-01 Qualcomm Incorporated Method and apparatus for processing power control signals in CDMA mobile telephone system
US7184426B2 (en) * 2002-12-12 2007-02-27 Qualcomm, Incorporated Method and apparatus for burst pilot for a time division multiplex system
US6574211B2 (en) * 1997-11-03 2003-06-03 Qualcomm Incorporated Method and apparatus for high rate packet data transmission
US9118387B2 (en) * 1997-11-03 2015-08-25 Qualcomm Incorporated Pilot reference transmission for a wireless communication system
KR100269593B1 (en) 1997-12-02 2000-10-16 정선종 Orthogonal complex spreading based modulation method for multichannel transmission
KR100381012B1 (en) 1998-05-04 2003-08-19 한국전자통신연구원 Random connection device for reverse common channel in cdma scheme and method therefor
US6091760A (en) * 1998-06-29 2000-07-18 L-3 Communications Corporation Non-recursively generated orthogonal PN codes for variable rate CDMA
US6724741B1 (en) 1998-06-29 2004-04-20 L-3 Communications Corporation PN code selection for synchronous CDMA
GB9814960D0 (en) * 1998-07-10 1998-09-09 Koninkl Philips Electronics Nv Coding device and communication system using the same
EP0982892A3 (en) * 1998-08-27 2002-04-24 Alantro Communications Inc. Packet-based binary convolutional codes
US6823488B1 (en) 1998-08-27 2004-11-23 Texas Instruments Incorporated Packet binary convolutional codes
KR20000019059A (en) * 1998-09-08 2000-04-06 윤종용 Source allocation and release method thereof according to data transmitting method in wireless local loop(wwl) system
US6690652B1 (en) * 1998-10-26 2004-02-10 International Business Machines Corporation Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation
US6249683B1 (en) * 1999-04-08 2001-06-19 Qualcomm Incorporated Forward link power control of multiple data streams transmitted to a mobile station using a common power control channel
US6690938B1 (en) 1999-05-06 2004-02-10 Qualcomm Incorporated System and method for reducing dropped calls in a wireless communications network
DE10027216B4 (en) 1999-05-31 2008-10-16 Electronics And Telecommunications Research Institute Apparatus and method for modulating a data message by using Orthogonal Variable Spreading Factor (OVSF) codes in a mobile communication system
US6744808B1 (en) * 1999-06-03 2004-06-01 Skyworks Solutions, Inc. Techniques to increase data transmission rate of spread spectrum communications systems
US8064409B1 (en) 1999-08-25 2011-11-22 Qualcomm Incorporated Method and apparatus using a multi-carrier forward link in a wireless communication system
US6621804B1 (en) * 1999-10-07 2003-09-16 Qualcomm Incorporated Method and apparatus for predicting favored supplemental channel transmission slots using transmission power measurements of a fundamental channel
CN1138354C (en) * 1999-11-11 2004-02-11 华为技术有限公司 Transmission mode combining CDMA tech. with variable speed image compression coding
AU2001247644A1 (en) * 2000-03-21 2001-10-03 Texas Instruments Santa Rosa Incorporated Coding and spreading technique for communications systems
US6952439B1 (en) * 2000-10-13 2005-10-04 The Titan Corporation System for, and method of, transmitting data from a transmitter to a receiver and recovering the data at the receiver
US6973098B1 (en) * 2000-10-25 2005-12-06 Qualcomm, Incorporated Method and apparatus for determining a data rate in a high rate packet data wireless communications system
US7068683B1 (en) 2000-10-25 2006-06-27 Qualcomm, Incorporated Method and apparatus for high rate packet data and low delay data transmissions
US7103026B2 (en) * 2000-10-27 2006-09-05 L-3 Communications Corporation Use of chip repetition to produce a flexible bandwidth DS-CDMA system
US8199696B2 (en) * 2001-03-29 2012-06-12 Qualcomm Incorporated Method and apparatus for power control in a wireless communication system
JP4718708B2 (en) * 2001-04-06 2011-07-06 富士通株式会社 Walsh code assignment method and assignment apparatus
TW572534U (en) 2001-04-16 2004-01-11 Interdigital Tech Corp A time division duplex/code division multiple access (FDD/CDMA) user equipment
US6996230B1 (en) 2003-06-13 2006-02-07 Adtran, Inc. Echo-canceler for precoded fractionally spaced receiver using signal estimator
KR100918763B1 (en) * 2003-11-14 2009-09-24 삼성전자주식회사 Interleaving apparatus and method in a channel coder using a parallel concatenated low density parity check code
US7720134B2 (en) * 2004-05-10 2010-05-18 Stmicroelectronics S.R.L. Frequency-domain multi-user access interference cancellation and nonlinear equalization in CDMA receivers
US8811200B2 (en) * 2009-09-22 2014-08-19 Qualcomm Incorporated Physical layer metrics to support adaptive station-dependent channel state information feedback rate in multi-user communication systems
US10742353B2 (en) * 2018-04-09 2020-08-11 Qualcomm Incorporated Cross-correlation reduction for control signals
CN111565161B (en) * 2020-04-28 2022-05-27 北京升哲科技有限公司 Baseband transmitter, baseband receiver, modulation and demodulation system and terminal

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547887A (en) * 1983-11-30 1985-10-15 The United States Of America As Represented By The Secretary Of The Army Pseudo-random convolutional interleaving
US4607375A (en) * 1984-10-17 1986-08-19 Itt Corporation Covert communication system
JPH0750883B2 (en) * 1985-09-18 1995-05-31 セイコーエプソン株式会社 Pager
US4724435A (en) * 1985-11-06 1988-02-09 Applied Spectrum Technologies, Inc. Bi-directional data telemetry system
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
JPS63156446A (en) * 1986-12-19 1988-06-29 Fujitsu Ltd Punctured coding circuit
US4914699A (en) * 1988-10-11 1990-04-03 Itt Corporation High frequency anti-jam communication system terminal
US5016255A (en) * 1989-08-07 1991-05-14 Omnipoint Data Company, Incorporated Asymmetric spread spectrum correlator

Also Published As

Publication number Publication date
IL101044A (en) 1995-05-26
US5204876A (en) 1993-04-20
DE69230710T2 (en) 2000-12-28
WO1992017011A1 (en) 1992-10-01
CA2077343C (en) 1998-08-18
EP0529051B1 (en) 2000-03-01
EP0529051A1 (en) 1993-03-03
JP2632596B2 (en) 1997-07-23
IL101044A0 (en) 1992-11-15
KR960000460B1 (en) 1996-01-06
EP0529051A4 (en) 1994-12-14
DE69230710D1 (en) 2000-04-06
JPH05506763A (en) 1993-09-30

Similar Documents

Publication Publication Date Title
CA2077343A1 (en) Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
CA2287321A1 (en) Rate control device and method for cdma communication system
US6674787B1 (en) Raising random access channel packet payload
CA2145708A1 (en) Code Division Multiple Access System Providing Variable Data Rate Access to a User
KR930701035A (en) Method and apparatus for providing high data rate traffic channel in spread spectrum communication system
WO2002031985A3 (en) Systems and methods for communicating spread spectrum signals using variable signal constellations
CA2256416A1 (en) High data rate cdma wireless communication system
CA2378885A1 (en) Signal blocking for a base radio control station
CA2417242A1 (en) Fast adaptive power control for a variable multirate communications system
MX9603336A (en) A high-data-rate wireless local-area network.
EP1513265A3 (en) Spread spectrum communication receiver and CDMA mobile communication method
IL111449A (en) Method and apparatus for variable rate signal transmission in a spread spectrum communication system using coset coding
CA2302491A1 (en) Apparatus and method for transmitting signals in a communication system
CA2247618A1 (en) Multiple antenna communication system and method thereof
NO20001072D0 (en) Procedure for sending data, as well as mobile phone system
WO1999001994A3 (en) A subscriber unit and method for use in a wireless communication system
IL128633A0 (en) Variable-bandwidth spread-spectrum device
CA2257211A1 (en) Subscriber unit for a cdma wireless communication system
CA2200341A1 (en) Optical Data Communication and Location Apparatus, System and Method and Transmitters and Receivers for Use Therewith
CA2199542A1 (en) Methods and Apparatus for High Data Rate Transmission in Narrow Band Mobile Radio Channels
DE69734190D1 (en) TDMA / CDMA communication system with adjustable data rate
CA2171008A1 (en) Method and apparatus for determining the transmission data rate in a multi-user communication system
WO1999007085A3 (en) Method and radio station for transmitting data
EP0939501A3 (en) Data transmission method, transmitter and receiver
EP2161846A3 (en) A subscriber unit and method for use in a wireless communication system

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry
MKEX Expiry

Effective date: 20120213