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公开(公告)号：JPH11261531A
公开(公告)日：1999-09-24
申请号：JP36899098
申请日：1998-12-25
Applicant: MOTOROLA INC
Inventor： MADHOW UPAMANYU , FRANK COLIN D , RASKY PHILLIP D
IPC: H03M7/30 , G06F17/14 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B1/7115 , H04B7/26 , H04J13/04
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device to completely suppress an interference vector in a DS-CDMA communications system. SOLUTION: Receiving branches 1 to 4 are allocated to a multi-path from both a sector that performs soft handoff and a sector that does not perform soft handoff (404 and 406). The set of a traffic channel included in a sector signal is decided for each receiving circuit (410). Interference is classified according to a prescribed interference condition for each receiving circuit (412). A set of interference vectors is selected from a classifying list of interference (414) and a desired code of a receiver or orthogonal projection of a Walsh code is calculated (416). Next, the receiving circuit inversely spreads received data by utilizing the orthogonal projection in its correlating device (418).
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公开(公告)号：JPH11266232A
公开(公告)日：1999-09-28
申请号：JP36899198
申请日：1998-12-25
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , MADHOW UPAMANYU , SINGH RAHUL
Abstract: PROBLEM TO BE SOLVED: To provide the improved interference suppression method for a DS- CDMA system. SOLUTION: This communication equipment of a mobile station or the like for a spread spectrum communication system which is provided with a receiver 100 provided with an adaptive equalizer 104 for suppressing interference on received spread spectrum signals and generating equalized signals 126. A pilot channel demodulator 110 demodulates the equalized signals and generates the estimated value 140 of a pilot channel. An adder 112 compares the pilot channel estimated value with a prescribed data pattern and generates error signals 124. A traffic channel demodulator 108 demodulates the equalized signals and generates one or more traffic channels.
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公开(公告)号：GB2333013B
公开(公告)日：2003-01-08
申请号：GB9827917
申请日：1998-12-21
Applicant: MOTOROLA INC
Inventor： MADHOW UPAMANYU , FRANK COLIN D , RASKY PHILLIP D
IPC: H03M7/30 , G06F17/14 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B1/7115 , H04B7/26
Abstract: Method and apparatus for completely suppressing interference vectors in a DS-CDMA communication system (100). Receiver circuits (122, 124, 126, 128) are assigned (404, 406) to multipath from sectors both in soft handoff and not in soft handoff with the receiver. For each receiver circuit, a set of traffic channels present on the sector's signal is determined (410). For each receiver circuit, the interference is ranked (412) according to predetermined interference criteria. A set of interference vectors is selected (414) from the ranked lists of interference and an orthogonal projection is computed (416) of the receiver's desired code or Walsh code relative to the selected set of interference vectors. The receiver circuit then uses the orthogonal projection in its correlator to despread (418) received data.
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公开(公告)号：GB2333422A
公开(公告)日：1999-07-21
申请号：GB9827920
申请日：1998-12-21
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , MADHOW UPAMANYU , SINGH RAHUL
Abstract: A communication device such as a mobile station for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
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公开(公告)号：DE19860094A1
公开(公告)日：1999-07-01
申请号：DE19860094
申请日：1998-12-23
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , MADHOW UPAMANYU , SINGH RAHUL
IPC: H04B1/10 , H04B1/707 , H04B3/10 , H04B7/005 , H04B7/26 , H04L25/03 , H04L27/01 , H04B7/216 , H04B1/69 , G08C17/02
Abstract: The method involves an equalization step using an adaptive equalizer, followed by a demodulation step. An error signal is produced by comparing a pilot channel of the equalized signal with a predetermined data sequence. The adaptive equalizer is adjusted in accordance with the error signal.
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Patent Agency Ranking
公开(公告)号：FR2773290B1
公开(公告)日：2004-10-29
申请号：FR9816207
申请日：1998-12-22
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , SINGH RAHUL , MADHOW UPAMANYU
Abstract: A communication device such as a mobile station (410) for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
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公开(公告)号：BR9806431A
公开(公告)日：1999-12-21
申请号：BR9806431
申请日：1998-12-28
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , MADHOW UPAMANYU , SINGH RAHUL
Abstract: A communication device such as a mobile station (410) for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
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公开(公告)号：FR2773290A1
公开(公告)日：1999-07-02
申请号：FR9816207
申请日：1998-12-22
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , SINGH RAHUL , MADHOW UPAMANYU
Abstract: A communication device such as a mobile station (410) for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
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公开(公告)号：GB2333422B
公开(公告)日：2003-05-14
申请号：GB9827920
申请日：1998-12-21
Applicant: MOTOROLA INC
Inventor： VISOTSKY YEVGENY , FRANK COLIN D , MADHOW UPAMANYU , SINGH RAHUL
Abstract: A communication device such as a mobile station (410) for a spread spectrum communication system includes a receiver (100) having an adaptive equalizer (104) which suppresses interference on a received spread spectrum signal to produce an equalized signal (126). A pilot channel demodulator (110) demodulates the equalized signal to produce an estimate of the pilot channel (140). A summer (112) compares the pilot channel estimate and a predetermined data pattern to produce an error signal (124). A traffic channel demodulator (108) demodulates the equalized signal to produce one or more traffic channels.
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公开(公告)号：GB2333013A
公开(公告)日：1999-07-07
申请号：GB9827917
申请日：1998-12-21
Applicant: MOTOROLA INC
Inventor： MADHOW UPAMANYU , FRANK COLIN D , RASKY PHILLIP D
IPC: H03M7/30 , G06F17/14 , H04B1/10 , H04B1/707 , H04B1/7107 , H04B1/7115 , H04B7/26
Abstract: Method and apparatus for completely suppressing interference vectors in a DS-CDMA communication system (100). Rake receiver circuits (122, 124, 126, 128) are assigned (404, 406) to multipath from sectors both in soft handoff and not in soft handoff with the receiver. For each receiver circuit, a set of traffic channels present on the sector's signal is determined (410). For each receiver circuit, the interference is ranked (412) according to predetermined interference criteria. A set of interference vectors is selected (414) from the ranked lists of interference and an orthogonal projection is computed (416) of the receiver's desired code or Walsh code relative to the selected set of interference vectors. The receiver circuit then uses the orthogonal projection in its correlator to despread (418) received data.
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