CA2224934A1 - Rake receiver architecture for a mobile demodulator used in a cdma communication system - Google Patents

Rake receiver architecture for a mobile demodulator used in a cdma communication system

Info

Publication number
CA2224934A1
CA2224934A1 CA002224934A CA2224934A CA2224934A1 CA 2224934 A1 CA2224934 A1 CA 2224934A1 CA 002224934 A CA002224934 A CA 002224934A CA 2224934 A CA2224934 A CA 2224934A CA 2224934 A1 CA2224934 A1 CA 2224934A1
Authority
CA
Canada
Prior art keywords
datapath
front ends
rake receiver
serviced
shared
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
CA002224934A
Other languages
French (fr)
Other versions
CA2224934C (en
Inventor
Kenneth D. Easton
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
Application filed by Individual filed Critical Individual
Publication of CA2224934A1 publication Critical patent/CA2224934A1/en
Application granted granted Critical
Publication of CA2224934C publication Critical patent/CA2224934C/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
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • 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
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • 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
    • H04B1/06—Receivers
    • 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

Abstract

The present invention involves demodulating a signal in a spread spectrum multiple access system employing a pilot on the foward link. The rake receiver (10) separates the signal processing based on the period over which the processing occurs. Symbol rate processing is performed by a single time-shared mutiply-accumulate datapath (34) that services multiple finger front ends (312) and a searcher front end (314). The front ends (312) are dedicated circuits that perform all chip rate processing, producing a data vector and asserting a flag indicating the results are ready to be serviced by the shared datapath. A datapath controller (308) arbitrates use of the datapath between the finger front ends (312), the searcher front end (314), and combining functions, configuring the datapath to service them on a first-come, firstserve basis. The controller (308) sequences the datapath through a fixed routine as dictated by the signal processing associated with the block being serviced.
CA002224934A 1995-06-20 1996-06-18 Rake receiver architecture for a mobile demodulator used in a cdma communication system Expired - Lifetime CA2224934C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/492,592 US5764687A (en) 1995-06-20 1995-06-20 Mobile demodulator architecture for a spread spectrum multiple access communication system
US08/492,592 1995-06-20
PCT/US1996/010575 WO1997001227A1 (en) 1995-06-20 1996-06-18 Rake receiver architecture for a mobile demodulator used in a cdma communication system

Publications (2)

Publication Number Publication Date
CA2224934A1 true CA2224934A1 (en) 1997-01-09
CA2224934C CA2224934C (en) 2006-01-24

Family

ID=23956850

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002224934A Expired - Lifetime CA2224934C (en) 1995-06-20 1996-06-18 Rake receiver architecture for a mobile demodulator used in a cdma communication system

Country Status (22)

Country Link
US (1) US5764687A (en)
EP (1) EP0834226B1 (en)
JP (1) JP3725552B2 (en)
KR (1) KR100390562B1 (en)
CN (1) CN1115805C (en)
AR (1) AR002539A1 (en)
AT (1) ATE338389T1 (en)
AU (1) AU700715B2 (en)
BR (1) BR9609173B1 (en)
CA (1) CA2224934C (en)
DE (1) DE69636498T2 (en)
EA (1) EA000728B1 (en)
FI (1) FI115270B (en)
HK (1) HK1010956A1 (en)
ID (1) ID19872A (en)
IL (1) IL118665A (en)
MY (1) MY115194A (en)
NO (1) NO975996L (en)
NZ (1) NZ312854A (en)
TW (1) TW295752B (en)
WO (1) WO1997001227A1 (en)
ZA (1) ZA964963B (en)

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