CA2197640A1 - Multiple access coding using bent sequences for mobile radio communications - Google Patents

Multiple access coding using bent sequences for mobile radio communications

Info

Publication number
CA2197640A1
CA2197640A1 CA002197640A CA2197640A CA2197640A1 CA 2197640 A1 CA2197640 A1 CA 2197640A1 CA 002197640 A CA002197640 A CA 002197640A CA 2197640 A CA2197640 A CA 2197640A CA 2197640 A1 CA2197640 A1 CA 2197640A1
Authority
CA
Canada
Prior art keywords
masks
scramble
individual
codeword
modulo
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
CA002197640A
Other languages
French (fr)
Other versions
CA2197640C (en
Inventor
Gregory E. Bottomley
Paul W. Dent
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.)
Ericsson 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23121414&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2197640(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to CA002643142A priority Critical patent/CA2643142A1/en
Priority to CA002643172A priority patent/CA2643172A1/en
Publication of CA2197640A1 publication Critical patent/CA2197640A1/en
Application granted granted Critical
Publication of CA2197640C publication Critical patent/CA2197640C/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
    • H04L1/0057—Block codes
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/12—Generation of orthogonal codes
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/04—Masking or blinding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/34—Encoding or coding, e.g. Huffman coding or error correction

Abstract

Information symbols spread using orthogonal or bi--orthogonal codewords are assigned a unique scramble mask that is taken from a set of scramble masks having selected correlation properties. The set of scramble masks is selected such that the correlation between the modulo-2 sum of two scramble masks with any codeword in a constant magnitude, independent of the codeword and the individual masks being compared. In one embodiment, when any two masks are summed using modulo-2 arithmetic, the Walsh transformation of that sum results in a maximally flat Walsh spectrum. For cellular radio telephone systems using subtractive CDMA demodulation techniques, a two-tier ciphering system ensures security at the cellular system level by using a pseudorandomly generated code key to select one of the scramble masks common to all of the mobile stations in a particular cell. Also, privacy at the individual mobile subscriber level is ensured by using a pseudorandomly generated ciphering key to encipher individual information signals before the scrambling operation.
CA002197640A 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications Expired - Lifetime CA2197640C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002643142A CA2643142A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications
CA002643172A CA2643172A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/291,693 1994-08-16
US08/291,693 US5550809A (en) 1992-04-10 1994-08-16 Multiple access coding using bent sequences for mobile radio communications
PCT/US1995/010229 WO1996005668A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA002643172A Division CA2643172A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications
CA002643142A Division CA2643142A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications

Publications (2)

Publication Number Publication Date
CA2197640A1 true CA2197640A1 (en) 1996-02-22
CA2197640C CA2197640C (en) 2009-10-20

Family

ID=23121414

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002643142A Abandoned CA2643142A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications
CA002643172A Abandoned CA2643172A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications
CA002197640A Expired - Lifetime CA2197640C (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002643142A Abandoned CA2643142A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications
CA002643172A Abandoned CA2643172A1 (en) 1994-08-16 1995-08-11 Multiple access coding using bent sequences for mobile radio communications

Country Status (15)

Country Link
US (3) US5550809A (en)
EP (1) EP0776555B1 (en)
JP (1) JPH10507322A (en)
KR (1) KR100323169B1 (en)
CN (1) CN1086079C (en)
AT (1) ATE268078T1 (en)
AU (1) AU703405B2 (en)
BR (1) BR9508876A (en)
CA (3) CA2643142A1 (en)
DE (1) DE69533086T2 (en)
FI (1) FI970637A (en)
MX (1) MX9701053A (en)
NO (1) NO322662B1 (en)
RU (2) RU2160508C2 (en)
WO (1) WO1996005668A1 (en)

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* Cited by examiner, † Cited by third party
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