CA2175488A1 - Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels - Google Patents

Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels

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Publication number
CA2175488A1
CA2175488A1 CA2175488A CA2175488A CA2175488A1 CA 2175488 A1 CA2175488 A1 CA 2175488A1 CA 2175488 A CA2175488 A CA 2175488A CA 2175488 A CA2175488 A CA 2175488A CA 2175488 A1 CA2175488 A1 CA 2175488A1
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CA
Canada
Prior art keywords
signals
phase
channel
communication channels
information
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
CA2175488A
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French (fr)
Other versions
CA2175488C (en
Inventor
Ephraim Zehavi
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.)
Qualcomm Inc
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2175488A1 publication Critical patent/CA2175488A1/en
Application granted granted Critical
Publication of CA2175488C publication Critical patent/CA2175488C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • 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
    • 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
    • H04J13/0022—PN, e.g. Kronecker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/102—Combining codes

Abstract

An improved system and method for communicating information over in-phase (I) and quadrature phase (Q) communication channels in a spread spectrum communication system is disclosed herein. In an exemplary implementation, first and second information signals (an, bn) are respectively transmitted over the I and Q communication channels using direct sequence spread spectrum communication signals.
In-phase pseudorandom noise (PNI) and quadrature phase pseudorandom noise (PNQ) signals of predetermined PN codes (178, 180) are used for spreading the first and second information signals (an, bn), respectively. In particular, the PNI and PNQ signals are respectively combined with the first and second information signals (an, bn) and an orthogonal function signal (174) to provide I-channel and Q-channel modulation signals (SI, SQ). The I-channel and Q-channel modulation signals (SI, SQ) are used for modulating in-phase (I) and quadrature phase (Q) carrier signals for transmission to a receiver via the I and Q communication channels, respectively. In a preferred implementation, the receiver is operative to produce an estimate of at least the first information signal on the basis of the I-channel and Q-channel modulated carrier signals (RI, RQ) received over the I and Q communication channels. The received I-channel and Q-channel modulated carrier signals (RI, RQ) are demodulated and despread, with the resultant sequences being correlated into in-phase (I) and quadrature phase (Q) projection signals. A phase rotator operates to provide an estimate of at least the first information signal based on the I and Q projection signals and a received pilot signal.
CA002175488A 1993-11-01 1994-10-27 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels Expired - Lifetime CA2175488C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US146,645 1993-11-01
US08/146,645 US5414728A (en) 1993-11-01 1993-11-01 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels
PCT/US1994/012448 WO1995012937A1 (en) 1993-11-01 1994-10-27 Quadrature multiplexing of two data signals spread by different pn-sequences

Publications (2)

Publication Number Publication Date
CA2175488A1 true CA2175488A1 (en) 1995-05-11
CA2175488C CA2175488C (en) 2000-09-05

Family

ID=22518324

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002175488A Expired - Lifetime CA2175488C (en) 1993-11-01 1994-10-27 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels

Country Status (18)

Country Link
US (1) US5414728A (en)
EP (1) EP0727115B1 (en)
JP (1) JP2851706B2 (en)
KR (1) KR100254249B1 (en)
CN (1) CN1065700C (en)
AT (1) ATE333170T1 (en)
AU (1) AU679813B2 (en)
BR (1) BR9407919A (en)
CA (1) CA2175488C (en)
DE (1) DE69434790T2 (en)
ES (1) ES2267099T3 (en)
FI (1) FI961826A (en)
HK (1) HK1015211A1 (en)
IL (1) IL111450A (en)
RU (1) RU2120189C1 (en)
TW (1) TW306100B (en)
WO (1) WO1995012937A1 (en)
ZA (1) ZA948431B (en)

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AU679813B2 (en) 1997-07-10
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KR960706242A (en) 1996-11-08
TW306100B (en) 1997-05-21
WO1995012937A1 (en) 1995-05-11
EP0727115A1 (en) 1996-08-21
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CN1133658A (en) 1996-10-16

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