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    SYSTEM AND METHOD FOR CALCULATING A STATE TRANSITION METRIC IN A VITERBI EQUALIZER
    1.
    发明申请
    SYSTEM AND METHOD FOR CALCULATING A STATE TRANSITION METRIC IN A VITERBI EQUALIZER 审中-公开
    在VITERBI均衡器中计算状态转换公式的系统和方法

    公开(公告)号：WO1993008637A1

    公开(公告)日：1993-04-29

    申请号：PCT/US1992006765

    申请日：1992-08-14

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  MUELLER, Bruce, D. ,  BORTH, David, E. ,  BAUM, Kevin, L.

    IPC: H03D01/00

    CPC classification number: H04L25/03197 ,  H04L27/22 ,  H04L2025/03401

    Abstract: A system and method for calculating survivor metrics in a Viterbi equalizer (424) of a receiver (56), such as a receiver operative to receive a PSK-modulated signal, for example, a π/4, differential, phase-shift-keying, modulated signal. The state transition metric, defined as a function of two successive states, is converted into a function defined by pairwise differences between allowable symbols of the PSK-modulated signal. When operative to receive π/4 DQPSK-modulated signal, the number of calculations required to calculate state transition metrics is reduced significantly.

    A DUAL MODE RADIO COMMUNICATION UNIT
    3.
    发明公开
    A DUAL MODE RADIO COMMUNICATION UNIT 失效
    两种模式RADIO新闻单位。

    公开(公告)号：EP0669025A1

    公开(公告)日：1995-08-30

    申请号：EP93923291.0

    申请日：1993-10-07

    Applicant: MOTOROLA, INC.

    Inventor： BORTH, David, E. ,  HAUG, John, R. ,  RASKY, Phillip, D. ,  CHIASSON, Gregory, M.

    IPC: G06F11 ,  H03M13 ,  H04B7 ,  H04L1 ,  H04W88

    CPC classification number: H04L1/0043 ,  H04L1/06 ,  H04W88/06

    Abstract: A dual mode radio communication unit (102, 104) for a digital communication system is provided having an error controller including an error detection encoder (111) and a forward error correction encoder (112) which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm (261) or an error correction algorithm (202). In addition, the corresponding communication unit includes a mode selector (141) for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

    A DUAL MODE RADIO COMMUNICATION UNIT
    4.
    发明授权
    A DUAL MODE RADIO COMMUNICATION UNIT 失效
    两种模式RADIO新闻单位

    公开(公告)号：EP0669025B1

    公开(公告)日：2000-03-08

    申请号：EP93923291.4

    申请日：1993-10-07

    Applicant: MOTOROLA, INC.

    Inventor： BORTH, David, E. ,  HAUG, John, R. ,  RASKY, Phillip, D. ,  CHIASSON, Gregory, M.

    IPC: G06F11/10 ,  H04L1/00

    CPC classification number: H04L1/0043 ,  H04L1/06 ,  H04W88/06

    Abstract: A dual mode radio communication unit (102, 104) for a digital communication system is provided having an error controller including an error detection encoder (111) and a forward error correction encoder (112) which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm (261) or an error correction algorithm (202). In addition, the corresponding communication unit includes a mode selector (141) for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

    A DUAL MODE RADIO COMMUNICATION UNIT
    7.
    发明申请
    A DUAL MODE RADIO COMMUNICATION UNIT 审中-公开
    双模无线电通信单元

    公开(公告)号：WO1994011819A1

    公开(公告)日：1994-05-26

    申请号：PCT/US1993009565

    申请日：1993-10-07

    Applicant: MOTOROLA INC.

    Inventor： MOTOROLA INC. ,  BORTH, David, E. ,  HAUG, John, R. ,  RASKY, Phillip, D. ,  CHIASSON, Gregory, M.

    IPC: G06F11/10

    CPC classification number: H04L1/0043 ,  H04L1/06 ,  H04W88/06

    Abstract: A dual mode radio communication unit (102, 104) for a digital communication system is provided having an error controller including an error detection encoder (111) and a forward error correction encoder (112) which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm (261) or an error correction algorithm (202). In addition, the corresponding communication unit includes a mode selector (141) for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

    Abstract translation: 提供了一种用于数字通信系统的双模无线电通信单元（102,104），其具有错误控制器，该误差控制器包括将输入信息信号编码为错误保护数据的错误检测编码器（111）和前向纠错编码器（112） 位流。 此外，通信单元包括模式选择器，其能够使得与通信单元的特定操作模式一起使用的错误检测编码器或前向纠错编码器。 此外，提供了相应的双模式无线电通信单元，其具有用于根据由错误检测算法（261）或纠错算法（202）组成的算法组来生成估计信息信号样本的误差控制器。 此外，对应的通信单元包括用于接收根据与对应的通信单元的特定操作模式相关联的算法组中的特定一个的信号的模式选择器（141）。

    SIGNAL WEIGHTING SYSTEM FOR DIGITAL RECEIVER
    8.
    发明申请
    SIGNAL WEIGHTING SYSTEM FOR DIGITAL RECEIVER 审中-公开
    用于数字接收机的信号称重系统

    公开(公告)号：WO1992016054A1

    公开(公告)日：1992-09-17

    申请号：PCT/US1992001162

    申请日：1992-02-12

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  BORTH, David, E. ,  RASKY, Phillip, D. ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

    IPC: H03M13/12

    CPC classification number: H03M13/00 ,  H04B7/005

    Abstract: A signal weighting system for associating a confidence level with portions of a communication signal transmitted upon a multipath channel (44) and received by a receiver (76). A signal received by the receiver is equalized by an equalizer circuit (60), such as a maximum likelihood sequence estimator (116), and the equalized signal generated thereby is supplied to an adaptive filter (92) which synthesizes portions of the multipath channel. The signal received by the receiver is altered responsive to values of a filtered, equalized signal generated by the adaptive filter.

    VITERBI EQUALIZER FOR RADIO RECEIVER
    10.
    发明申请
    VITERBI EQUALIZER FOR RADIO RECEIVER 审中-公开
    用于无线电接收器的VITERBI均衡器

    公开(公告)号：WO1993007688A1

    公开(公告)日：1993-04-15

    申请号：PCT/US1992006767

    申请日：1992-08-14

    Applicant: MOTOROLA, INC.

    Inventor： MOTOROLA, INC. ,  BORTH, David, E. ,  MUELLER, Bruce, D. ,  BAUM, Kevin, L.

    IPC: H04B15/00

    CPC classification number: H04L27/22 ,  H04L25/03197 ,  H04L25/03203 ,  H04L2025/03401

    Abstract: A Viterbi equalizer (366) for decoding a π/4 DQPSK modulated signal. Because symbol values of adjacent symbols of a π/4 DQPSK signal are offset in phase relative to one another, allowable values of succeeding states of a π/4 DQPSK signal are four in number. The signal paths of the Viterbi equalizer are thereby limited in number to four allowable next-states (600) and the Viterbi equalizer (366) is operative to select certain ones of the paths connecting the states at the adjacent time intervals as survivor paths to form maximum likelihood paths thereby.

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