公开(公告)号：ZA9600186B

公开(公告)日：1996-07-09

申请号：ZA9600186

申请日：1996-01-10

Applicant: QUALCOMM INC

Inventor： LEVIN JEFFREY A ,  WERNER DAVID E ,  EASTON KENNETH D

IPC: H04B7/216 ,  H04B7/26 ,  H04L27/30 ,  H04W88/08 ,  H03K ,  H04B ,  H04J

CPC classification number: H04B7/2628 ,  H04W88/08

Abstract: An integrated demodulation processor used in a modem for a spread spectrum communications system despreads multipath receive signals then uses a time sliced transform processor to process the multiple signals in to a single series of soft decision results. The demodulation processor uses a single transform engine which operates on a time slice basis. The output of the processor engine cascade through a pipeline processor which, on a time slice basis, operates on signals corresponding to each multipath receive signal. The processed results are dual maxima decoded to provide soft decision data.

公开(公告)号：FI962258A0

公开(公告)日：1996-05-29

申请号：FI962258

申请日：1996-05-29

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  LEVIN JEFFREY A

IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20 ,  H04B

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.

公开(公告)号：AU3945195A

公开(公告)日：1996-04-26

申请号：AU3945195

申请日：1995-09-27

Applicant: QUALCOMM INC

Inventor： EASTON KENNETH D ,  LEVIN JEFFREY A

IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20

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.