CA2072876A1 - Diversity receiver in a cdma cellular telephone system - Google Patents

Diversity receiver in a cdma cellular telephone system

Info

Publication number
CA2072876A1
CA2072876A1 CA002072876A CA2072876A CA2072876A1 CA 2072876 A1 CA2072876 A1 CA 2072876A1 CA 002072876 A CA002072876 A CA 002072876A CA 2072876 A CA2072876 A CA 2072876A CA 2072876 A1 CA2072876 A1 CA 2072876A1
Authority
CA
Canada
Prior art keywords
signal
spread spectrum
receiver
searcher
cellular telephone
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
CA002072876A
Other languages
French (fr)
Other versions
CA2072876C (en
Inventor
Klein S. Gilhousen
Roberto Padovani
Charles E. Wheatley, Iii
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
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=23716632&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2072876(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
Publication of CA2072876A1 publication Critical patent/CA2072876A1/en
Application granted granted Critical
Publication of CA2072876C publication Critical patent/CA2072876C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Abstract

A spread spectrum receiver subsystem for utili-zation in a CDMA cellular telephone having a searcher receiver (44) for scanning the time domain so as to use the PN processing gain and time discri-mination properties of spread spectrum coding to de-termine the location in the time domain and the re-ceived signal strength of multiple receptions of a pilot signal traveling upon one or more physical propaga-tion paths to reception. The searcher receiver (44) provides a control signal indicative of the received pi-lot signals of greatest strength and corresponding time relationship. A data receiver (40, 42) receives spread spectrum communication signals accompany-ing each received pilot signal and is responsive to the searcher control signal for acquiring and demodulat-ing a spread spectrum communication signal, con-comitant with the pilot signal of greatest signal strength, and thus providing a corresponding en-coded output signal bearing information.
CA002072876A 1989-11-07 1990-11-05 Diversity receiver in a cdma cellular telephone system Expired - Lifetime CA2072876C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/432,552 US5109390A (en) 1989-11-07 1989-11-07 Diversity receiver in a cdma cellular telephone system
US432,552 1989-11-07
PCT/US1990/006417 WO1991007036A1 (en) 1989-11-07 1990-11-05 Diversity receiver in a cdma cellular telephone system

Publications (2)

Publication Number Publication Date
CA2072876A1 true CA2072876A1 (en) 1991-05-08
CA2072876C CA2072876C (en) 2002-03-12

Family

ID=23716632

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002072876A Expired - Lifetime CA2072876C (en) 1989-11-07 1990-11-05 Diversity receiver in a cdma cellular telephone system

Country Status (22)

Country Link
US (1) US5109390A (en)
EP (1) EP0500761B2 (en)
JP (1) JP3073767B2 (en)
KR (1) KR100218177B1 (en)
CN (1) CN1036429C (en)
AT (1) ATE163244T1 (en)
AU (1) AU649987B2 (en)
BR (1) BR9007827A (en)
CA (1) CA2072876C (en)
DE (1) DE69032044T3 (en)
DK (1) DK0500761T4 (en)
ES (1) ES2113353T5 (en)
FI (1) FI108973B (en)
GR (1) GR3026464T3 (en)
HK (1) HK1020138A1 (en)
IL (1) IL96220A (en)
MX (1) MX173030B (en)
MY (1) MY104809A (en)
NO (1) NO304207B1 (en)
SG (1) SG52745A1 (en)
WO (1) WO1991007036A1 (en)
ZA (1) ZA908856B (en)

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