CA2496605A1 - Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel - Google Patents

Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel Download PDF

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Publication number
CA2496605A1
CA2496605A1 CA002496605A CA2496605A CA2496605A1 CA 2496605 A1 CA2496605 A1 CA 2496605A1 CA 002496605 A CA002496605 A CA 002496605A CA 2496605 A CA2496605 A CA 2496605A CA 2496605 A1 CA2496605 A1 CA 2496605A1
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CA
Canada
Prior art keywords
transmitter
orthogonal
code
share
time
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
CA002496605A
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French (fr)
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CA2496605C (en
Inventor
Avneesh Agrawal
Brian K. Butler
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Qualcomm Inc
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Individual
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Publication date
Priority claimed from US08/627,831 external-priority patent/US6134215A/en
Application filed by Individual filed Critical Individual
Publication of CA2496605A1 publication Critical patent/CA2496605A1/en
Application granted granted Critical
Publication of CA2496605C publication Critical patent/CA2496605C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A system and method for enabling multiple transmitters (400) to share a single code division multiplexed (CDM) or code division multiple access (CDMA) channel using orthogonal waveforms. A set of orthogonal channelizing codes W i(t) is generated, and each transmitter (400) is allocated orthogonal channelizing codes and pseudonoise polynomials in a predetermined manner. The transmitters channelize each user signal using an orthogonal channelizing code W i(t), and spread each user signal using a pseudonoise (PN) spreading code. Each transmitter employs the same PN spreading codes and time off-sets. Additionally, no one orthogonal channelizing code is assigned to more than one transmitter during the time period they are sharing a CDM channel. The spread signals are summed at each transmitter (404) prior to transmission as a composite signal. The offsets are time-precorrected (406, 510) to ensure time alignment at the receivers. The frequencies of the signals are precorrected (408, 512) to ensure frequency alignment at the receivers.
CA002496605A 1996-04-02 1997-04-01 Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel Expired - Fee Related CA2496605C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US627,831 1996-04-02
US08/627,831 US6134215A (en) 1996-04-02 1996-04-02 Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel
CA002222928A CA2222928C (en) 1996-04-02 1997-04-01 Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002222928A Division CA2222928C (en) 1996-04-02 1997-04-01 Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel

Publications (2)

Publication Number Publication Date
CA2496605A1 true CA2496605A1 (en) 1997-10-09
CA2496605C CA2496605C (en) 2008-08-19

Family

ID=34423906

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002496605A Expired - Fee Related CA2496605C (en) 1996-04-02 1997-04-01 Using orthogonal waveforms to enable multiple transmitters to share a single cdm channel

Country Status (1)

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CA (1) CA2496605C (en)

Also Published As

Publication number Publication date
CA2496605C (en) 2008-08-19

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