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    Method and apparatus for determining signal strength in a spread spectrum communication system having a variable data rate
    184.
    发明专利
    Method and apparatus for determining signal strength in a spread spectrum communication system having a variable data rate 未知

    公开(公告)号：AU6386296A

    公开(公告)日：1997-01-15

    申请号：AU6386296

    申请日：1996-06-17

    Applicant: QUALCOMM INC

    Inventor： ZIV NOAM ABRAHAM ,  PADOVANI ROBERTO

    IPC: H04J13/04 ,  H04B7/005 ,  H04B17/00 ,  H04L1/00 ,  H04B7/26

    Abstract: A method and apparatus of determining signal strength, regardless of the signal data rate, in a receiver receiving signals from a variable rate transmitter. The incoming signal is comprised of a series of frames. Each frame is comprised of a number of power control groups containing data. The number of the power control groups containing data within each frame is dependent on the unknown data rate. The position of the power control groups within the frame is a pseudorandom. The signal strength of an incoming signal of unknown data rate is determined based upon an active set of power control groups within a frame. The active set of power control groups contain data independent of the unknown data rate. This signal strength information may be used to indicate that the signal strength is sufficient to perform further signal processing.

    METHOD OF RECEIVING AND SEARCHING A SIGNAL TRANSMITTING IN BURSTS
    186.
    发明专利
    METHOD OF RECEIVING AND SEARCHING A SIGNAL TRANSMITTING IN BURSTS 未知

    公开(公告)号：CA2220224A1

    公开(公告)日：1996-11-07

    申请号：CA2220224

    申请日：1996-05-02

    Applicant: QUALCOMM INC

    Inventor： EASTON KENNETH D ,  PADOVANI ROBERTO ,  LEVIN JEFFREY A ,  ZIV NOAM A

    IPC: H04B1/69 ,  H04Q7/22 ,  H04J13/02

    Abstract: An integrated search processor (128) used in a modem (110) for a spread spectrum communications system buffers in a buffer (172) received signals samples and utilizes a time sliced transform processor (120) operating on successive offsets from the buffer (172). The search processor (128) autonomously steps through a search as configured by a microprocessor (136) 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 (128) 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 (122) reassignment. The search is done in a linar fashion independent of the probability that a signal being searched for was transmitted at any given time.

    Method of searching for a bursty signal
    187.
    发明专利
    Method of searching for a bursty signal 未知

    公开(公告)号：ZA963188B

    公开(公告)日：1996-10-23

    申请号：ZA963188

    申请日：1996-04-22

    Applicant: QUALCOMM INC

    Inventor： ZIV NOAM A ,  PADOVANI ROBERTO ,  LEVIN JEFFREY A ,  EASTON KENNETH D

    IPC: H04L1/02 ,  H04B1/707 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L27/30 ,  H04Q7/20 ,  H04B ,  H04J

    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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