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    Techniques for reduction of delayed reflection inter-symbol interference
    2.
    发明授权
    Techniques for reduction of delayed reflection inter-symbol interference 有权
    减少延迟反射符号间干扰的技术

    公开(公告)号：US07724847B2

    公开(公告)日：2010-05-25

    申请号：US11121853

    申请日：2005-05-03

    申请人： Baruch Bublil ,  Amir Mezer

    发明人： Baruch Bublil ,  Amir Mezer

    IPC分类号： H04L27/06 ,  H03D1/06

    CPC分类号： H04L25/03343 ,  H04L25/03012 ,  H04L25/03127 ,  H04L25/03267 ,  H04L25/03286

    摘要： Techniques are described to reduce delayed reflection inter-symbol interference (ISI) in signals. In some implementations, a channel reflection canceller is provided at a signal receiver to reduce delayed reflection ISI in received signals. The channel reflection canceller may be provided with a signal from an equalizer output or a tentative or final decision from a forward-error correction (FEC) decoder. Based on the signal from the equalizer output or tentative or final decisions from the FEC decoder, the channel reflection canceller may generate a signal to reduce delayed reflection ISI in received signals. In addition or as an alternative, in some implementations, the remote transmitter of the signal generates a delayed reflection ISI reducing signal to reduce delayed reflection ISI present in the signal transmitted over a channel. The transmitter may generate the delayed reflection ISI reducing signal using information provided by the remote signal receiver.

    摘要翻译： 描述了减少信号中的延迟反射符号间干扰（ISI）的技术。 在一些实现中，在信号接收器处提供信道反射消除器以减少接收信号中的延迟反射ISI。 信道反射消除器可以被提供有来自均衡器输出的信号或来自前向纠错（FEC）解码器的暂定或最终决定。 基于来自均衡器输出的信号或来自FEC解码器的暂定或最终决定，信道反射消除器可以生成信号以减少接收信号中的延迟反射ISI。 另外或作为替代方案，在一些实施方案中，信号的远程发射器产生延迟反射ISI降低信号，以减少通过信道传输的信号中存在的延迟反射ISI。 发射机可以使用由远程信号接收机提供的信息产生延迟反射ISI降低信号。

    GFSK/GMSK detector with enhanced performance in co-channel interference and AWGN channels
    3.
    发明申请
    GFSK/GMSK detector with enhanced performance in co-channel interference and AWGN channels 有权

    公开(公告)号：US20060268973A1

    公开(公告)日：2006-11-30

    申请号：US11141439

    申请日：2005-05-31

    申请人： Ganning Yang

    发明人： Ganning Yang

    IPC分类号： H03H7/40

    CPC分类号： H04L27/2331 ,  H04L25/03127 ,  H04L25/03133 ,  H04L27/2017

    摘要： A detector for detecting a received signal according to a Gaussian shift keying (“GFSK/GMSK”) modulation scheme. The detector may enhance a detection performance of the receiver while limiting one or more implementation impacts. An implementation impact may include an implementation complexity impact, an implementation cost impact, or other impacts. The detection performance of the detector may be enhanced in relation to one or more performance aspects, such as, an ISI aspect, an AWGN aspect, a co-channel interference aspect, a sensitivity aspect, an error propagation aspect, or other aspects. The detector may be configured or reconfigured to enhance one or more particular performance aspects. The enhancement of the particular performance aspects may affect, adversely or otherwise, one or more related performance aspects that may be related to the particular performance aspects. The detector may be configured or reconfigured according to a current application of the detector.

    Low-power, high-frequency finite impulse finite response (FIR) filter and method of use
    4.
    发明申请
    Low-power, high-frequency finite impulse finite response (FIR) filter and method of use 失效
    低功耗，高频有限脉冲有限响应（FIR）滤波器及其使用方法

    公开(公告)号：US20040193669A1

    公开(公告)日：2004-09-30

    申请号：US10679107

    申请日：2003-10-02

    发明人： Ramin Shirani

    IPC分类号： G06G007/02

    CPC分类号： H04B3/142 ,  H04L25/0292 ,  H04L25/03127 ,  H04L25/03146 ,  H04L25/03878

    摘要： A finite impulse response (FIR) filter is disclosed. The finite impulse response (FIR) filter comprises a passive delay line and a plurality of delay stages coupled to the passive delay line. The plurality of delay stages comprises a multiplier stage. The finite impulse response (FIR) filter includes an amplifier coupled to the delay line. A finite impulse response (FIR) filter in accordance with the present invention compensates the low-pass and/or dispersive characteristics of a communication channel (cable, fiber, etc.) in a multi-Gaps link. The receiver uses the filter to cancel the inter-symbol interference (ISI) caused by the channel on the received data. In a second aspect, a decision feedback equalizer (DFE) is a non-linear filter that can cancel the non-linear dispersion effects of a channel, and therefore extends its application to a very wide range of communication channels, including but not limited to channels with linear multi-path and/or nonlinear distortion.

    摘要翻译： 公开了一种有限脉冲响应（FIR）滤波器。 有限脉冲响应（FIR）滤波器包括被动延迟线和耦合到被动延迟线的多个延迟级。 多个延迟级包括乘法器级。 有限脉冲响应（FIR）滤波器包括耦合到延迟线的放大器。 根据本发明的有限脉冲响应（FIR）滤波器补偿多间隙链路中的通信信道（电缆，光纤等）的低通和/或色散特性。 接收机使用滤波器来消除由接收到的数据上的信道引起的符号间干扰（ISI）。 在第二方面，判决反馈均衡器（DFE）是可以消除信道的非线性色散效应的非线性滤波器，因此将其应用扩展到非常广泛的通信信道，包括但不限于 具有线性多径和/或非线性失真的通道。

    Method and apparatus converting digital signals to analog signals and simultaneous transmission of AC power and signals over wire conductors
    5.
    发明授权
    Method and apparatus converting digital signals to analog signals and simultaneous transmission of AC power and signals over wire conductors 失效
    方法和装置将数字信号转换为模拟信号，并通过电线导体同时传输交流电源和信号

    公开(公告)号：US5065133A

    公开(公告)日：1991-11-12

    申请号：US398784

    申请日：1989-08-25

    申请人： Gary Howard

    发明人： Gary Howard

    IPC分类号： H04L12/10 ,  H04L25/03

    CPC分类号： H04L25/03127 ,  H04L12/10

    摘要： A method and apparatus for enhancing digital signal transmission is provided for (1) converting a digital signal to an enhanced analog signal having a specified polarity and angular velocity; (2) transmitting that enhanced analog signal from one electronic component to another electronic component; and (3) converting the enhanced analog signal back to a reconstituted digital signal. The enhanced analog signal comprises a smooth non-periodic function of voltage, current and time which preferably has the waveform of a versine function signal with specified polarity. A method of supplying power to remote locations of the apparatus for enhancing digital signals is also presented.

    摘要翻译： 提供一种用于增强数字信号传输的方法和装置，用于（1）将数字信号转换成具有指定极性和角速度的增强模拟信号; （2）将增强的模拟信号从一个电子部件发送到另一个电子部件; 和（3）将增强的模拟信号转换回重构的数字信号。 增强的模拟信号包括电压，电流和时间的平滑非周期性函数，其优选地具有指定极性的正弦函数信号的波形。 还提出了一种向装置的远程位置供电以增强数字信号的方法。

    Intersymbol interference component eliminating system
    6.
    发明授权
    Intersymbol interference component eliminating system 失效
    INTERSYMBOL干扰组件消除系统

    公开(公告)号：US3750026A

    公开(公告)日：1973-07-31

    申请号：US3750026D

    申请日：1972-07-24

    申请人： NIPPON TT PUBLIC CORP

    发明人： WATANABE K

    IPC分类号： H04L25/03 ,  H04L27/06 ,  H04B1/16

    CPC分类号： H04L25/03127 ,  H04L25/03885 ,  H04L27/066

    摘要： An intersymbol interference component eliminating system having a demodulator supplied with a carrier wave to demodulate an amplitude modulated digital symbol synchronized with a timing signal, and an intersymbol interference component eliminating circuit including a delay line supplied with a demodulated digital symbol derived from the demodulator, a weighting circuit Aj(j n, -(n- 1), . . . -1, 0, +1, . . . +(n-1) and +n) supplied with an output derived from a terminal Qj of the delay line, a circuit for summing outputs of the weighting circuits and a circuit for generating a weight coefficient control signal Dj based on the output of the summing circuit and the timing signal, the circuit Aj being controlled in its weight coefficient Cj by the signal Dj, in which circuits are provided for generating carrier wave and timing signal phase control signals respectively based on the signals D n, D (n 1), . . . D 1, D 1, . . . D (n 1) and D n, the carrier wave and timing signal phase control signals corresponding to C respectively (k -n, -(n-1), . . . -1, +1, . . . +(n-1) and +n) and Alpha k and Alpha ''k being predetermined weight coefficients corresponding to the coefficient Ck in the case where only the phases of the carrier wave and the timing signal shift by predetermined amounts respectively, and circuits are provided for shifting the phases of the carrier wave and the timing signal based on the carrier wave and timing signal phase control signals respectively.

    摘要翻译： 一种符号间干扰分量消除系统，具有提供有载波的解调器，以解调与定时信号同步的幅度调制数字符号，以及符号间干扰分量消除电路，包括提供有从解调器导出的解调数字符号的延迟线， 加权电路Aj（j = n， - （n- 1），...，-1，0，+1，... +（n-1）和+ n） 延迟线，用于对加权电路的输出进行求和的电路和用于根据加法电路和定时信号的输出产生加权系数控制信号Dj的电路，电路Aj被其加权系数Cj控制为信号Dj ，其中分别基于信号Dn，D（n-1）来产生载波和定时信号相位控制信号的电路。 。 。 D-1，D + 1，。 。 。 D +（n-1）和D + n分别对应于C的载波和定时信号相位控制信号（k = -n， - （n-1），... -1，+1，... + （n-1）和+ n），并且αk和α'k分别是在载波和定时信号的相位分别移位预定量和提供电路的情况下对应于系数C k的预定加权系数 用于分别基于载波和定时信号相位控制信号来移位载波和定时信号的相位。