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    System and algorithm for multipath mitigation
    3.
    发明授权
    System and algorithm for multipath mitigation 有权
    多径缓解的系统和算法

    公开(公告)号：US09264082B2

    公开(公告)日：2016-02-16

    申请号：US13914691

    申请日：2013-06-11

    申请人： BAE Systems Information And Electronic Systems Integration Inc.

    发明人： Gary R. Lomp

    IPC分类号： H03D1/06 ,  H03D11/04 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L7/00 ,  H04L25/08

    CPC分类号： H04B1/1081 ,  H04L25/03057 ,  H04L2025/03484 ,  H04L2025/03605 ,  H04L2025/03681

    摘要： A system and method for optimally combining multi-path signals is presented. A first signal is received that traveled a first path from a transmitter to a receiving location and a second signal is received that traveled a different second path from the transmitter to the same receiving location. The paths are different so that the first and second signals contain the same signal data but the first signal has a first distortion that is different than a second distortion in the second signal. According to an objective function, the method adaptively generates a first weight value and a second weight value. The first and second weight values are applied to the respective first and second signals to produce respective first and second weighted signals. The first and second weighted signals are linearly combined producing a combined signal with a combined signal degradation.

    摘要翻译： 提出了一种用于最佳组合多路径信号的系统和方法。 接收到从发射机到接收位置行进第一路径的第一信号，并且接收到将不同的第二路径从发射机行进到同一接收位置的第二信号。 路径是不同的，使得第一和第二信号包含相同的信号数据，但是第一信号具有与第二信号中的第二失真不同的第一失真。 根据目标函数，该方法自适应地产生第一权重值和第二权重值。 将第一和第二加权值应用于相应的第一和第二信号以产生相应的第一和第二加权信号。 第一和第二加权信号被线性组合，产生具有组合信号劣化的组合信号。

    Method and apparatus for layer 1 / layer 2 convergence declaration for an adaptive equalizer
    4.
    发明授权
    Method and apparatus for layer 1 / layer 2 convergence declaration for an adaptive equalizer 有权
    自适应均衡器的层1 /层2收敛声明的方法和装置

    公开(公告)号：US07912161B2

    公开(公告)日：2011-03-22

    申请号：US11593652

    申请日：2006-11-07

    申请人： Alex Nicolescu ,  Kenji Suzuki ,  Brian Wall ,  Michael McDonnell

    发明人： Alex Nicolescu ,  Kenji Suzuki ,  Brian Wall ,  Michael McDonnell

    IPC分类号： H03D1/06 ,  H03D11/04 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

    CPC分类号： H04L25/03057 ,  H04J3/0602 ,  H04J2203/006 ,  H04J2203/0089 ,  H04L2025/037

    摘要： A novel method and apparatus is disclosed, that embeds with, or otherwise makes available to an adaptive equalizer, suitable for use in IEEE 1OG-LRM standard compliant receivers, digital logic that monitors some of the Layer 1 and preferably some of the Layer 2 processing that typically occurs after the equalization step during decoding and processing of the record data stream. From this additional logic information, the equalizer is able to make a much more accurate prediction of equalizer convergence by counting processing errors and prove convergence by calculation of BER. The novel method and apparatus are applicable to ASIC embodiments and the complexity of the logic information obtained can be programmably scaled back or enhanced as appropriate in light of the particular communication environment.

    摘要翻译： 公开了一种新颖的方法和装置，其嵌入或以其他方式可用于自适应均衡器，适用于IEEE 1OG-LRM标准兼容接收器，数字逻辑，其监视第1层中的一些，优选地监视第2层处理中的一些 这通常在解码和处理记录数据流之后的均衡步骤之后发生。 根据该附加逻辑信息，均衡器能够通过对处理误差进行计数并通过计算BER来证明收敛，从而对均衡器收敛进行更准确的预测。 新颖的方法和装置适用于ASIC实施例，并且根据特定通信环境，所获得的逻辑信息的复杂性可以根据特定的可编程地缩减或增强。

    Efficient reduced complexity windowed optimal time domain equalizer for discrete multitone-based DSL modems
    5.
    发明授权
    Efficient reduced complexity windowed optimal time domain equalizer for discrete multitone-based DSL modems 失效
    对于离散多媒体DSL调制解调器，有效降低复杂度窗口化的最佳时域均衡器

    公开(公告)号：US07180969B1

    公开(公告)日：2007-02-20

    申请号：US11405860

    申请日：2006-04-18

    申请人： Richard H. Erving ,  Lalitha Sankaranarayanan

    发明人： Richard H. Erving ,  Lalitha Sankaranarayanan

    IPC分类号： H03D1/06 ,  H03D11/04 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10

    CPC分类号： H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L5/0007 ,  H04L25/03114 ,  H04L2025/03414 ,  H04L2025/03445

    摘要： An algorithm for computing an efficient, reduced complexity, windowed optimal linear time domain equalizer for a dispersive channel comprises the steps of determining a window of maximum energy in the impulse response of length equal to or less than a number of cyclic prefix samples associated with a received digital data signal, computing the corresponding inside and outside matrices, performing an inverse Cholesky decomposition of the inside matrix, creating a resultant matrix as the product of the outer and the upper and lower square root inner matrix, followed by Householder reduction and QL transformation to thereby compute the time domain equalizer as the linear transformation of the eigenvector corresponding to the smallest eigenvalue at the receiver. The smallest eigenvalue is determined using the aforementioned orthogonal transformations without determining all the eigenvalues efficiently but without the loss accuracy associated with iterative methods like the conventional power method. The algorithm may be most conveniently implemented, for example, in the form of a thirty-two bit digital signal processor at a data receiver.

    摘要翻译： 一种用于计算用于分散信道的有效的，降低的复杂度的窗口最优线性时域均衡器的算法包括以下步骤：确定长度等于或小于与一个相关联的循环前缀样本的数量的脉冲响应中的最大能量的窗口 接收数字数据信号，计算相应的内外矩阵，执行内部矩阵的逆Cholesky分解，创建一个合成矩阵作为外，上，下平方根内部矩阵的乘积，其次是Householder减少和QL变换 从而计算时域均衡器作为对应于接收机处的最小特征值的特征向量的线性变换。 使用上述正交变换来确定最小特征值，而不是有效地确定所有特征值，而没有与常规功率方法类似的迭代方法相关的损失精度。 该算法可以最方便地实现，例如，在数据接收器处以32位数字信号处理器的形式。

    Reduced-radiation radio signal receivers
    6.
    发明授权
    Reduced-radiation radio signal receivers 失效
    减少辐射无线电信号接收机

    公开(公告)号：US5946609A

    公开(公告)日：1999-08-31

    申请号：US810382

    申请日：1997-03-03

    申请人： Gilles Morey

    发明人： Gilles Morey

    IPC分类号： H03D11/04 ,  H04B1/30 ,  H04B1/16

    CPC分类号： H03D11/04 ,  H04B1/30

    摘要： A radio receiver with isolation between an antenna and a regenerative oscillator/detector. The isolation is provided by periodically (at the receiver's quench frequency) uncoupling the antenna from the regenerative oscillator/detector. The receiver preferably includes an antenna, a super-regenerative oscillator/detector, a clock that indicates the quench frequency, a timing circuit coupled to the clock, and a switch coupled to the antenna, to the oscillator/detector, and to the timing circuit. The timing circuit specifies a first part and a second part of each clock period. During the first part of each clock period, the switch at least partially couples the antenna to the oscillator/detector on the nominal reception frequency. During the second part of each clock period, the switch at least partially uncouples these two elements on the nominal reception frequency. The timing circuit determines the first and second parts of each clock period so that the first part corresponds to a phase of sensitivity for the oscillator/detector, and so that the second part corresponds to phases in which oscillations in the oscillator/detector rise in amplitude, and/or have an increased amplitude, and/or decay in amplitude. Thus, the inadvertent emission of electromagnetic radiation from the regenerative oscillator/detector at the nominal reception frequency is attenuated or suppressed at least during the second part of each clock period.

    摘要翻译： 天线与再生振荡器/探测器之间隔离的无线电接收机。 隔离通过周期性地（在接收器的淬火频率）将天线与再生振荡器/检测器分离。 接收器优选地包括天线，超再生振荡器/检测器，指示猝熄频率的时钟，耦合到时钟的定时电路，以及耦合到天线的开关，振荡器/检测器和定时电路 。 定时电路指定每个时钟周期的第一部分和第二部分。 在每个时钟周期的第一部分期间，开关至少部分地以标称接收频率将天线耦合到振荡器/检测器。 在每个时钟周期的第二部分期间，开关至少部分地将标称接收频率上的这两个元件断开。 定时电路确定每个时钟周期的第一部分和第二部分，使得第一部分对应于振荡器/检测器的灵敏度相位，并且使得第二部分对应于振荡器/检测器中的振荡幅度上升的相位 ，和/或具有增加的幅度和/或振幅衰减。 因此，至少在每个时钟周期的第二部分期间，来自再生振荡器/检测器的标称接收频率的电磁辐射的无意发射被衰减或抑制。

    Electrically tuned RF receiver, apparatus and method therefor
    7.
    发明授权
    Electrically tuned RF receiver, apparatus and method therefor 失效
    电调RF接收机，其设备及方法

    公开(公告)号：US5105162A

    公开(公告)日：1992-04-14

    申请号：US718145

    申请日：1991-06-20

    申请人： Thomas Fleissner ,  Gerald M. Brehmer

    发明人： Thomas Fleissner ,  Gerald M. Brehmer

    IPC分类号： H03J3/20 ,  H03B5/32 ,  H03D11/04 ,  H03J1/00 ,  H04B1/22 ,  H04B1/26

    CPC分类号： H03J1/0033 ,  H03B5/326 ,  H03D11/04 ,  H03J1/0025

    摘要： An electrically tuned super-regenerative receiver (10) comprises a feedback type oscillator having a signal output and a signal input, phase shift components (30) connected in a feedback loop for coupling the signal output to the signal input to cause oscillations, and a quench oscillator (35) coupled to the signal input for switching the oscillator between an oscillating and a non-oscillating condition. A variable capacitance device (40), such as a varactor diode, is connected between the signal output and a reference potential (21), and a microprocessor (105) provides a tuning voltage (42) which is applied at the signal output for varying the current in the varactor diode, thereby varying the oscillator center operating frequency. The oscillator center operating frequency is detected by a spectrum analyzer (112) and compared to a desired center operating frequency by a controller (118). The controller controls a signal generator (123) to transmit a control signal which is received by the receiver and provided to the microprocessor for varying the tuning voltage to change the oscillator center operating frequency to be equal to the desired center operating frequency. An EEPROM (108) is provided for storing the tuning voltage required to produce oscillations at the desired center operating frequency.