公开(公告)号：US07907691B2

公开(公告)日：2011-03-15

申请号：US11579690

申请日：2005-05-11

Applicant: Ivonete Markman

Inventor： Ivonete Markman

IPC: H04B1/10

CPC classification number: H04L25/0307 ,  H04L25/03057 ,  H04L2025/03662 ,  H04L2025/03732 ,  H04N5/211

Abstract: A decision feedback equalizer for processing a data signal provides concurrent equalizer outputs (Zok, Z1k) for hard decision directed and soft decision directed modes. The joint architecture in accordance with the present invention takes advantage of the fact, herein recognized, that for each equalizer output symbol soft decision bit representation, a subset of these bits corresponds to the hard decision representation. As a result, the invention permits the concurrent output of two distinct modes with essentially the same hardware as a one output equalizer.

Abstract translation: 用于处理数据信号的判决反馈均衡器为硬决策导向和软判决定向模式提供并发均衡器输出（Zok，Z1k）。 根据本发明的联合架构利用了这一点所认识到的事实：对于每个均衡器输出符号软判决比特表示，这些比特的子集对应于硬判决表示。 结果，本发明允许两个不同模式的并发输出具有与一个输出均衡器基本上相同的硬件。

公开(公告)号：US5517213A

公开(公告)日：1996-05-14

申请号：US315050

申请日：1994-09-29

Applicant: Bhavesh B. Bhatt ,  Adolf Dsouza

Inventor： Bhavesh B. Bhatt ,  Adolf Dsouza

IPC: H04N5/21 ,  H03H21/00 ,  H04B3/04 ,  H04L25/03 ,  H03H7/30

CPC classification number: H04N5/211 ,  H04L25/0305 ,  H04L2025/03585 ,  H04L2025/03662 ,  H04L2025/03732

Abstract: A blind equalization process (200) for an adaptive equalizer including a plurality of taps, each having a corresponding coefficient, is disclosed which comprises the following steps. Blind equalization (204) is performed on a subset of the coefficients in the adaptive equalizer. Then, if the coefficients have converged (206), a decision directed adaptive equalization process (220) is initiated.

Abstract translation: 公开了一种包括多个抽头的自适应均衡器的盲均衡处理（200），每个抽头具有相应的系数，其包括以下步骤。 对自适应均衡器中的系数子集执行盲均衡（204）。 然后，如果系数已经收敛（206），则启动决策自适应均衡处理（220）。

公开(公告)号：US5283813A

公开(公告)日：1994-02-01

申请号：US834092

申请日：1992-02-12

Applicant: Ofir Shalvi ,  Ehud Weinstein

Inventor： Ofir Shalvi ,  Ehud Weinstein

IPC: H04B3/14 ,  G06F17/10 ,  G06F17/15 ,  G06T5/20 ,  H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H04B3/23 ,  H04L25/03 ,  H03H7/30

CPC classification number: H04L25/0305 ,  H04L2025/03662

Abstract: A method and apparatus for controlling an equalizer receiving the output of an unknown system in order to produce a desired response for recovering the input to the system are characterized by iteratively adjusting the equalizer such that the unknown system combined with the equalizer behaves essentially as a linear system whose (t,n) taps, for some combinations of t and n, are iteratively adjusted according to the following rule: ##EQU1## where s.sub.t,n denotes the (t,n) tap before the iteration, s'.sub.t,n denotes the (t,n) tap after the iteration, I is a preselected integer greater then or equal to one, .alpha..sub.i i=1,2 . . . I are preselected scalars that may vary from iteration to iteration, and p.sub.i, q.sub.i i=1,2, . . . I are preselected non-negative integers such that p.sub.i +q.sub.i .gtoreq.2.

Abstract translation: 用于控制接收未知系统的输出以便产生用于恢复到系统的输入的期望响应的均衡器的方法和装置的特征在于迭代地调整均衡器，使得与均衡器组合的未知系统基本上表现为线性 （t，n）抽头，对于t和n的某些组合，根据以下规则进行迭代调整：（*化学结构*）其中st，n表示迭代​​前的（t，n）抽头，s' t，n表示迭代​​后的（t，n）抽头，I是大于等于1的预选整数，（α）ii = 1,2。 。 。 我是可以从迭代到迭代的预选标量，pi，qi i = 1,2。 。 。 我是预选的非负整数，使得pi + qi> = 2。

公开(公告)号：US4044307A

公开(公告)日：1977-08-23

申请号：US700903

申请日：1976-06-29

Applicant: Richard Borysiewicz ,  Charles W. Roedel

Inventor： Richard Borysiewicz ,  Charles W. Roedel

IPC: H04L25/03 ,  H04M11/00

CPC classification number: H04L25/03133 ,  H04L2025/03662

Abstract: Disclosed is an automatic data communication system having communicating modems equipped with automatic equalizers. The equalizers respond to a first long equalization sequence automatically transmitted from another modem. In response to that long equalization sequence, the equalizer starts from a preset non-equalized condition and assumes a fully equalized condition. That equalized modem is also capable of automatically transmitting its own long equalization sequence to the other modem. Thereafter, second short equalization sequences are employed at the receiving modems to enable a memory storage associated with the automatic equalizers. The memory stores, in response to the long equalization sequence, signals which are indicative of the fully equalized condition. Accordingly, the equalizers do not have to start from a non-equalized condition for each new data message unless a dramatic distortion occurs. If such distortion does occur, it is automatically detected and long equalization sequences are again employed to fully re-equalize. The disclosed modems have detection means for automatically distinguishing between equalization sequences, line drop-outs, and data echoes.

Abstract translation: 公开了具有配备有自动均衡器的通信调制解调器的自动数据通信系统。 均衡器响应从另一个调制解调器自动发送的第一个长均衡序列。 响应于该长均衡序列，均衡器从预设的非均衡条件开始并且采取完全均衡的条件。 该均衡调制解调器还能够自动将其自己的长均衡序列发送到另一个调制解调器。 此后，在接收调制解调器处采用第二短均衡序列，以实现与自动均衡器相关联的存储器存储。 存储器响应于长均衡序列存储指示完全均衡的条件的信号。 因此，除非发生剧烈的失真，否则均衡器不必从每个新数据消息的非均衡条件开始。 如果发生这种失真，则自动检测并且再次使用长均衡序列来完全重新均衡。 所公开的调制解调器具有用于自动区分均衡序列，线路丢失和数据回波的检测手段。

公开(公告)号：US08351556B2

公开(公告)日：2013-01-08

申请号：US13192773

申请日：2011-07-28

Applicant: Mark Kent ,  Uri Landau ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Ning Kong ,  Pieter Roux

Inventor： Mark Kent ,  Uri Landau ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Ning Kong ,  Pieter Roux

IPC: H04B1/10

CPC classification number: H04B7/0413 ,  H04L25/03038 ,  H04L2025/03426 ,  H04L2025/03471 ,  H04L2025/03617 ,  H04L2025/03662 ,  H04L2025/037

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may include updating a plurality of filter taps utilizing at least one channel response vector and at least one correlation vector, for a plurality of received clusters, based on initialized values related to the at least one channel response vector and the at least one correlation vector. At least a portion of the received signal clusters may be filtered utilizing at least a portion of the updated plurality of filter taps. The update may be repeated whenever a specified signal-to-noise ratio (SNR) for the received signal clusters is reached. The initialized values may be updated during a plurality of iterations, and the update may be repeated whenever a specified number of the plurality of iterations is reached.

Abstract translation: 本文公开了一种用于在接收机中处理信号的方法和系统，并且可以包括利用至少一个信道响应向量和至少一个相关向量来更新多个滤波器抽头，对于多个接收到的簇，基于与该at 至少一个信道响应向量和所述至少一个相关向量。 可以利用更新的多个滤波器抽头的至少一部分来对接收信号簇的至少一部分进行滤波。 只要达到接收信号簇的指定信噪比（SNR），就可以重新进行更新。 可以在多次迭代期间更新初始化值，并且可以在达到多次迭代的指定次数时重新进行更新。

公开(公告)号：US07907685B2

公开(公告)日：2011-03-15

申请号：US11895078

申请日：2007-08-23

Applicant: Weizhong Chen

Inventor： Weizhong Chen

IPC: H03D3/00 ,  H04L27/14 ,  H04L1/02 ,  H04L27/06 ,  H04B1/10

CPC classification number: H04L25/03318 ,  H04L2025/03407 ,  H04L2025/03426 ,  H04L2025/0349 ,  H04L2025/03662 ,  H04L2025/03726 ,  H04L2027/0038 ,  H04L2027/0065

Abstract: A GMSK receiver with interference cancellation includes a linear equalizer configured to be coupled to a received signal from a first antenna and to provide first soft bits, an adaptive estimator, e.g., adaptive MLSE coupled to the first soft bits and configured to provide second soft bits; a quality assessor coupled to the first soft bits and configured to provide a quality indication; and a switching function coupled to the linear equalizer and the adaptive MLSE and controlled in accordance with the quality indication to provide output soft bits corresponding to at least one of the first soft bits and the second soft bits. The GMSK receiver can be extended to multiple antennas and corresponding methods for interference cancellation in a GMSK signal are discussed.

Abstract translation: 具有干扰消除的GMSK接收机包括线性均衡器，其被配置为耦合到来自第一天线的接收信号并且提供第一软比特，自适应估计器，例如耦合到第一软比特的自适应MLSE，并且被配置为提供第二软比特 ; 质量评估器，其耦合到所述第一软比特并且被配置为提供质量指示; 以及耦合到所述线性均衡器和所述自适应MLSE并根据所述质量指示进行控制以提供对应于所述第一软比特和所述第二软比特中的至少一个的输出软比特的切换功能。 GMSK接收机可以扩展到多个天线，并讨论了相应的GMSK信号干扰消除方法。

公开(公告)号：US07856052B2

公开(公告)日：2010-12-21

申请号：US11565365

申请日：2006-11-30

Applicant: Mark Kent ,  Uri Landau ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Ning Kong ,  Pieter Roux

Inventor： Mark Kent ,  Uri Landau ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Ning Kong ,  Pieter Roux

IPC: H03K5/159 ,  H03H7/30 ,  H03H7/40

CPC classification number: H04B7/0413 ,  H04L25/03038 ,  H04L2025/03426 ,  H04L2025/03471 ,  H04L2025/03617 ,  H04L2025/03662 ,  H04L2025/037

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may include updating a plurality of filter taps utilizing at least one channel response vector and at least one correlation vector, for a plurality of received clusters, based on initialized values related to the at least one channel response vector and the at least one correlation vector. At least a portion of the received signal clusters may be filtered utilizing at least a portion of the updated plurality of filter taps. The update may be repeated whenever a specified signal-to-noise ratio (SNR) for the received signal clusters is reached. The initialized values may be updated during a plurality of iterations, and the update may be repeated whenever a specified number of the plurality of iterations is reached.

Abstract translation: 本文公开了一种用于在接收机中处理信号的方法和系统，并且可以包括利用至少一个信道响应向量和至少一个相关向量来更新多个滤波器抽头，对于多个接收到的簇，基于与该at 至少一个信道响应向量和所述至少一个相关向量。 可以利用更新的多个滤波器抽头的至少一部分来对接收信号簇的至少一部分进行滤波。 只要达到接收信号簇的指定信噪比（SNR），就可以重新进行更新。 可以在多次迭代期间更新初始化值，并且可以在达到多次迭代的指定次数时重新进行更新。

公开(公告)号：US20100080277A1

公开(公告)日：2010-04-01

申请号：US12239791

申请日：2008-09-28

Applicant: Lin Yang ,  Syang-Myau Hwang ,  Qian Zhuang ,  Jun Lu ,  Shue-Lee Chang

Inventor： Lin Yang ,  Syang-Myau Hwang ,  Qian Zhuang ,  Jun Lu ,  Shue-Lee Chang

IPC: H04L27/01

CPC classification number: H04L25/03057 ,  H04L2025/03617 ,  H04L2025/03662 ,  H04L2025/03668 ,  H04L2025/037

Abstract: A method used in a time domain equalizer is provided. A method comprising the steps of: providing a time domain equalizer comprising a feed forward equalizer and a feedback equalizer; and using a conjugate gradient iteration in order to calculate a set of coefficients of the time domain equalizer.

Abstract translation: 提供了一种在时域均衡器中使用的方法。 一种方法，包括以下步骤：提供包括前馈均衡器和反馈均衡器的时域均衡器; 并使用共轭梯度迭代来计算时域均衡器的一组系数。

公开(公告)号：US07630466B2

公开(公告)日：2009-12-08

申请号：US11281204

申请日：2005-11-15

Applicant: Afshin Momtaz ,  Rajesh Satapathy ,  Chung-Jue Chen

Inventor： Afshin Momtaz ,  Rajesh Satapathy ,  Chung-Jue Chen

IPC: H04B1/10

CPC classification number: H04L25/03057 ,  H03L7/0814 ,  H04L7/0037 ,  H04L7/033 ,  H04L2025/0349 ,  H04L2025/03617 ,  H04L2025/03662 ,  H04L2025/03687 ,  H04L2025/037

Abstract: A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.

Abstract translation: 搜索引擎选择接收均衡器的初始系数。 搜索引擎可以并入到包括判决反馈均衡器和时钟和数据恢复电路的通信接收器中。 这里，搜索引擎可以初始化可以控制例如判决反馈均衡器，时钟和数据恢复电路以及连续时间滤波器的操作的各种适配环路。 接收机可以包括用于产生一些适配环路的软判决数据的模拟 - 数字转换器。

公开(公告)号：US07054354B2

公开(公告)日：2006-05-30

申请号：US10078952

申请日：2002-02-19

Applicant: Alexei Gorokhov ,  Johan Paul Marie Gerard Linnartz

Inventor： Alexei Gorokhov ,  Johan Paul Marie Gerard Linnartz

IPC: H04K1/00

CPC classification number: H04L27/2665 ,  H04L25/03159 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522 ,  H04L2025/03624 ,  H04L2025/03662 ,  H04L2025/03668

Abstract: Described is a transmission system for transmitting a multicarrier signal from a transmitter (10) to a receiver (20). The multicarrier signal comprises a plurality of subcarriers. The receiver (20) comprises a channel estimator (28) for estimating amplitudes of the subcarriers and for estimating time derivatives of the amplitudes. The receiver (20) further comprises an equalizer (24) for canceling intercarrier interference included in the received multicarrier signal in dependence on the estimated amplitudes and derivates (29). The receiver (20) comprises a multiplication by a N×N leakage matrix, and wherein the multiplication is implemented as a sequence of an N-point IFFT (82), N pointwise multiplications (84) and an N-point FFT (86). multiplications (84) and an N-point FFT (86).

Abstract translation: 描述了一种用于从发射机（10）向接收机（20）发送多载波信号的传输系统。 多载波信号包括多个子载波。 接收器（20）包括用于估计子载波的振幅并估计时间的幅度的导数的信道估计器（28）。 接收器（20）还包括一个均衡器（24），用于根据所估计的幅度和导数（29）来消除包含在所接收的多载波信号中的载波间干扰。 接收器（20）包括乘以N×N泄漏矩阵，并且其中乘法被实现为N点IFFT（82），N个点乘法（84）和N点FFT（86）的序列。 乘法（84）和N点FFT（86）。