CA2191882A1 - A multi-user communication system architecture with distributed receivers - Google Patents

A multi-user communication system architecture with distributed receivers

Info

Publication number
CA2191882A1
CA2191882A1 CA002191882A CA2191882A CA2191882A1 CA 2191882 A1 CA2191882 A1 CA 2191882A1 CA 002191882 A CA002191882 A CA 002191882A CA 2191882 A CA2191882 A CA 2191882A CA 2191882 A1 CA2191882 A1 CA 2191882A1
Authority
CA
Canada
Prior art keywords
fht
receiver
analog
processing
channel
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
CA002191882A
Other languages
French (fr)
Other versions
CA2191882C (en
Inventor
David S. Miller
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
David S. Miller
Qualcomm Incorporated
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 David S. Miller, Qualcomm Incorporated filed Critical David S. Miller
Publication of CA2191882A1 publication Critical patent/CA2191882A1/en
Application granted granted Critical
Publication of CA2191882C publication Critical patent/CA2191882C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B7/0891—Space-time diversity
    • 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
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
    • 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
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]

Abstract

Method and apparatus for receiving signals in gateways for satellite repeater type spread spectrum communication systems making more efficient use of data transfer capacity and diversity processing.
Several communication signals are received by multiple analog receivers (62M) and converted into digital format. The digital communication signals are transferred from each analog receiver (62M) into a series of demodulation or FHT modules (164) in which they are first despread into encoded data symbols using predetermined PN coding sequences, and then mapped into symbol energy metrics using orthogonal transformers (192), such as fast Hadamard transformers. The transformation output for each communication channel from each analog receiver (62M) is input to a single metric receiver (166N) for a data channel or subscriber, where it is subjected to conventional metric signal processing to reconstruct the data. A set of dedicated modules (164MN) is coupled to each analog receiver (62M) for handling each diversity path or subscriber active communication system channel being transferred through that receiver or analog path. Each demodulation or FHT module (164MN) comprises despreading elements (176, 178) and FHT components (192) that are easily distributed in processing arrays within the gateway.

spreading elements (176, 178) and FHT components (192) that are easily distributed in processing arrays within the gateway.
CA002191882A 1995-04-03 1996-03-29 A multi-user communication system architecture with distributed receivers Expired - Fee Related CA2191882C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/415,958 US5608722A (en) 1995-04-03 1995-04-03 Multi-user communication system architecture with distributed receivers
US08/415,958 1995-04-03
PCT/US1996/004336 WO1996031960A1 (en) 1995-04-03 1996-03-29 A multi-user communication system architecture with distributed receivers

Publications (2)

Publication Number Publication Date
CA2191882A1 true CA2191882A1 (en) 1996-10-10
CA2191882C CA2191882C (en) 2004-10-19

Family

ID=23647932

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002191882A Expired - Fee Related CA2191882C (en) 1995-04-03 1996-03-29 A multi-user communication system architecture with distributed receivers

Country Status (14)

Country Link
US (1) US5608722A (en)
EP (1) EP0763290B1 (en)
JP (1) JP3043425B2 (en)
KR (1) KR100387277B1 (en)
CN (1) CN1096159C (en)
AT (1) ATE241875T1 (en)
AU (1) AU698946B2 (en)
BR (1) BR9606291A (en)
CA (1) CA2191882C (en)
DE (1) DE69628382T2 (en)
FI (1) FI114594B (en)
HK (1) HK1015200A1 (en)
RU (1) RU2156033C2 (en)
WO (1) WO1996031960A1 (en)

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CN1149947A (en) 1997-05-14
JPH10501676A (en) 1998-02-10
FI114594B (en) 2004-11-15
KR100387277B1 (en) 2003-08-25
FI964820A (en) 1997-02-03
EP0763290B1 (en) 2003-05-28
RU2156033C2 (en) 2000-09-10
WO1996031960A1 (en) 1996-10-10
US5608722A (en) 1997-03-04
DE69628382T2 (en) 2004-04-01
CN1096159C (en) 2002-12-11
EP0763290A1 (en) 1997-03-19
FI964820A0 (en) 1996-12-02
AU5529996A (en) 1996-10-23
AU698946B2 (en) 1998-11-12
CA2191882C (en) 2004-10-19
JP3043425B2 (en) 2000-05-22
ATE241875T1 (en) 2003-06-15
BR9606291A (en) 1997-09-02
HK1015200A1 (en) 1999-10-08
DE69628382D1 (en) 2003-07-03

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