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    NETWORK ECHO CANCELLER.
    11.
    发明公开
    NETWORK ECHO CANCELLER. 失效
    NETZWERKECHOKOMPENSATOR。

    公开(公告)号：EP0615674A4

    公开(公告)日：1997-08-06

    申请号：EP93923128

    申请日：1993-09-24

    Applicant: QUALCOMM INC

    Inventor： SIH GILBERT C

    IPC: H04M1/60 ,  G10L19/012 ,  H04B3/23 ,  H04M9/08

    CPC classification number: H04B3/234 ,  G10L19/012 ,  H04B3/23 ,  H04M9/082

    Abstract: An echo canceller and method for cancelling in a return channel signal an echoed receive channel signal where the echoed receive channel signal is combined by an echo channel (142) with an input return channel signal. A control unit (152) determines from the receive channel signal, the combined signal, and first and second echo residuals, one of a plurality of control states wherein a first control state is indicative of a receive channel signal above a first predetermined energy level, wherein when the control unit (152) is in the first control state it generates the first control signal and generates the second control signal when at least one of a first energy ratio of the first echo residual signal and the combined signal exceed a predetermined level.

    Abstract translation: 一种回声消除器和方法，用于消除回送信道信号中的回声接收信道信号，其中回声接收信道信号由回声信道（142）与输入返回信道信号组合。 控制单元（152）根据接收信道信号，组合信号以及第一和第二回波残差确定多个控制状态中的一个，其中第一控制状态指示高于第一预定能级的接收信道信号， 其中当所述控制单元（152）处于所述第一控制状态时，其产生所述第一控制信号，并且当所述第一回波剩余信号和所述组合信号的第一能量比中的至少一个超过预定水平时，产生所述第二控制信号。

    DIGITAL SIGNAL PROCESSOR WITH COUPLED MULTIPLY-ACCUMULATE UNITS
    14.
    发明专利
    DIGITAL SIGNAL PROCESSOR WITH COUPLED MULTIPLY-ACCUMULATE UNITS 未知

    公开(公告)号：CA2400647C

    公开(公告)日：2010-06-29

    申请号：CA2400647

    申请日：2001-02-23

    Applicant: QUALCOMM INC

    Inventor： SIH GILBERT C ,  CHEN XUFENG ,  HSU DE D

    IPC: G06F7/00 ,  G06F7/544 ,  G06F17/10

    Abstract: Two multiply-accumulate units are coupled together so that the computation (B*C)+(D*E) can be completed in one cycle. An adder (216) adds together the products of the two multipliers (206), (208). The sum is applied to the first accumulator (220). Preferably, the second product is also applied to the second accumulator (222), and a multiplexer (218) applies either a zero or the second product to the adder (216). If two unrelated computations are to be executed simultaneously, then the zero is applied, and the output of the second accumulator is fed back to the register file (PI2). If a single (B*C) + (D*E) computation is to be executed, then the second product is applied to the adder, and the output of the second accumulator is disregarded.

    16.
    发明专利
    未知

    公开(公告)号：DE69839260D1

    公开(公告)日：2008-04-30

    申请号：DE69839260

    申请日：1998-01-27

    Applicant: QUALCOMM INC

    Inventor： SIH GILBERT C ,  MAURO ANTHONY P

    IPC: H04B3/23 ,  H04M1/60 ,  H04B3/20 ,  H04M9/08

    Abstract: A method and apparatus for controlling various functional elements in a digital telephone system using state determination from an echo canceller. An echo canceller is used to evaluate which one of five talk states two speakers are engaged in during a telephone conversation. This state determination information is used to control a tone detector function, a noise suppressor function, an adaptive equalizer function, a transmission mute function, and a vocoder encoder function within a vocoder. During the talk state where the far-end speaker is active and the near-end speaker is inactive, the echo canceller provides a signal which disables background noise estimates from being performed in the noise suppressor and the vocoder encoder. The same signal is used to disable the tone detector and to enable the transmission mute function during this talk state.

    Apparatus and method of velocity estimation
    19.
    发明专利
    Apparatus and method of velocity estimation 未知

    公开(公告)号：HK1066864A1

    公开(公告)日：2005-04-01

    申请号：HK04109624

    申请日：2004-12-06

    Applicant: QUALCOMM INC

    Inventor： WILBORN THOMAS BRIAN ,  PATEL SHIMMAN ,  SIH GILBERT C ,  ABRISHAMKAR FARROKH

    IPC: G01S11/02 ,  G01S19/25 ,  G01S19/26

    Abstract: A velocity estimate is determined from a received signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope values are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.

    20.
    发明专利
    未知

    公开(公告)号：FI115168B

    公开(公告)日：2005-03-15

    申请号：FI20010422

    申请日：2001-03-02

    Applicant: QUALCOMM INC

    Inventor： ZOU QIUZHEN ,  SIH GILBERT C ,  KANG INYUP

    IPC: G01S1/00 ,  G01S1/04 ,  G01S5/00 ,  G01S19/23 ,  G01S19/25 ,  G01S19/30 ,  G01S19/48 ,  H04M1/725 ,  H04Q7/34 ,  G01S5/14

    Abstract: A mobile device (10) comprises a receiver and a coherent integrator (104), wherein the receiver is configured to receive a first signal from a satellite, the first signal including a navigation message. The coherent integrator is configured to coherently integrate first signal samples for a particular coherent integration interval. When the coherent integration interval straddles a data boundary of the navigation message, the coherent integration is divided into a section before the data boundary of the navigation message and a section after the data boundary of the navigation message

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