WO2001071963A3 - Coding and spreading technique for communications systems - Google Patents

Coding and spreading technique for communications systems Download PDF

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Publication number
WO2001071963A3
WO2001071963A3 PCT/US2001/009028 US0109028W WO0171963A3 WO 2001071963 A3 WO2001071963 A3 WO 2001071963A3 US 0109028 W US0109028 W US 0109028W WO 0171963 A3 WO0171963 A3 WO 0171963A3
Authority
WO
WIPO (PCT)
Prior art keywords
codeword
codes
coding
spreading
communications systems
Prior art date
Application number
PCT/US2001/009028
Other languages
French (fr)
Other versions
WO2001071963A2 (en
Inventor
Chris Heegard
Matthew B Shoemake
Eric J Rossin
Original Assignee
Texas Instr Santa Rosa 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
Application filed by Texas Instr Santa Rosa Inc filed Critical Texas Instr Santa Rosa Inc
Priority to AU2001247644A priority Critical patent/AU2001247644A1/en
Publication of WO2001071963A2 publication Critical patent/WO2001071963A2/en
Publication of WO2001071963A3 publication Critical patent/WO2001071963A3/en

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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
    • H04L1/0059—Convolutional codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/102—Combining 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
    • H04L1/004—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
    • H04L1/0064—Concatenated codes
    • H04L1/0065—Serial concatenated 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 are provided for generating a code having both coding gain and spreading factor. An information bit is first encoded using a rate r encoder (100). A repetition pattern (120) is then applied to a first codeword generated by the rate r encoder to obtain a second codeword having a redundancy factor of L. A cover code (140) is applied to the second codeword to spread the spectrum occupied by the second codeword. The combination of error correction codes, repetition codes and cover or spreading codes provides both coding gain and spreading factor and can result in a signal having the distance spectrum otherwise achievable by more complex codes.
PCT/US2001/009028 2000-03-21 2001-03-21 Coding and spreading technique for communications systems WO2001071963A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001247644A AU2001247644A1 (en) 2000-03-21 2001-03-21 Coding and spreading technique for communications systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52894700A 2000-03-21 2000-03-21
US09/528,947 2000-03-21

Publications (2)

Publication Number Publication Date
WO2001071963A2 WO2001071963A2 (en) 2001-09-27
WO2001071963A3 true WO2001071963A3 (en) 2002-02-28

Family

ID=24107883

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/009028 WO2001071963A2 (en) 2000-03-21 2001-03-21 Coding and spreading technique for communications systems

Country Status (3)

Country Link
AU (1) AU2001247644A1 (en)
TW (1) TW513874B (en)
WO (1) WO2001071963A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5204876A (en) * 1991-03-13 1993-04-20 Motorola, Inc. Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
US5581575A (en) * 1993-11-01 1996-12-03 Qualcomm Incorporated Method and apparatus for transmission of variable rate digital data
US5907586A (en) * 1995-09-04 1999-05-25 Oki Electric Industry Co., Ltd. Method and device for signal decision, receiver and channel condition estimating method for a coding communication system
WO1999045660A1 (en) * 1998-03-02 1999-09-10 Samsung Electronics Co., Ltd. Rate control device and method for cdma communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5204876A (en) * 1991-03-13 1993-04-20 Motorola, Inc. Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
US5581575A (en) * 1993-11-01 1996-12-03 Qualcomm Incorporated Method and apparatus for transmission of variable rate digital data
US5907586A (en) * 1995-09-04 1999-05-25 Oki Electric Industry Co., Ltd. Method and device for signal decision, receiver and channel condition estimating method for a coding communication system
WO1999045660A1 (en) * 1998-03-02 1999-09-10 Samsung Electronics Co., Ltd. Rate control device and method for cdma communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAMES L. MASSEY: "Towards an Information Theory of Spread-Spectrum Systems", CODE DIVISION MULTIPLE ACCESS COMMUNICATIONS, 1995, pages 29 - 46, XP002182365 *

Also Published As

Publication number Publication date
AU2001247644A1 (en) 2001-10-03
WO2001071963A2 (en) 2001-09-27
TW513874B (en) 2002-12-11

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