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公开(公告)号：DE69531096T2
公开(公告)日：2004-04-08
申请号：DE69531096
申请日：1995-09-27
Applicant: QUALCOMM INC
Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. This reduces the searching process related workload of the microprocessor and also reduces the modem costs by allowing a complete channel element modem circuit to be produced in a single IC.
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公开(公告)号：DE69531096D1
公开(公告)日：2003-07-24
申请号：DE69531096
申请日：1995-09-27
Applicant: QUALCOMM INC
Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. This reduces the searching process related workload of the microprocessor and also reduces the modem costs by allowing a complete channel element modem circuit to be produced in a single IC.
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公开(公告)号：DE69624698T2
公开(公告)日：2003-08-21
申请号：DE69624698
申请日：1996-05-02
Applicant: QUALCOMM INC
Inventor： ZIV A , PADOVANI ROBERTO , LEVIN A , EASTON D
Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. The search is done in a linear fashion independent of the probability that a signal being searched for was transmitted at any given time.
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Patent Agency Ranking
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公开(公告)号：DE69636498T2
公开(公告)日：2007-03-29
申请号：DE69636498
申请日：1996-06-18
Applicant: QUALCOMM INC
Inventor： EASTON D
IPC: H04B7/26 , H04B1/7115 , H04B1/7117
Abstract: The present invention involves demodulating a signal in a spread spectrum multiple access system employing a pilot on the forward link. The rake receiver separates the signal processing based on the period over which the processing occurs. Symbol rate processing is performed by a single time-shared multiply-accumulate datapath that services multiple finger front ends and a searcher front end. The front ends 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 arbitrates use of the datapath between the finger front ends, the searcher front end, and combining functions, configuring the datapath to service them on a first-come, first-serve basis. The controller sequences the datapath through a fixed routine as dictated by the signal processing associated with the block being serviced.
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公开(公告)号：DE69636498D1
公开(公告)日：2006-10-12
申请号：DE69636498
申请日：1996-06-18
Applicant: QUALCOMM INC
Inventor： EASTON D
IPC: H04B7/26 , H04B1/7115 , H04B1/7117
Abstract: The present invention involves demodulating a signal in a spread spectrum multiple access system employing a pilot on the forward link. The rake receiver separates the signal processing based on the period over which the processing occurs. Symbol rate processing is performed by a single time-shared multiply-accumulate datapath that services multiple finger front ends and a searcher front end. The front ends 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 arbitrates use of the datapath between the finger front ends, the searcher front end, and combining functions, configuring the datapath to service them on a first-come, first-serve basis. The controller sequences the datapath through a fixed routine as dictated by the signal processing associated with the block being serviced.
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公开(公告)号：DE69624698D1
公开(公告)日：2002-12-12
申请号：DE69624698
申请日：1996-05-02
Applicant: QUALCOMM INC
Inventor： ZIV A , PADOVANI ROBERTO , LEVIN A , EASTON D
Abstract: An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps through a search as configured by a microprocessor specified search parameter set, which can include the group of antennas to search over, the starting offset and width of the search window to search over, and the number of Walsh symbols to accumulate results at each offset. The search processor calculates the correlation energy at each offset, and presents a summary report of the best paths found in the search to use for demodulation element reassignment. The search is done in a linear fashion independent of the probability that a signal being searched for was transmitted at any given time.
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