公开(公告)号：US20070121718A1

公开(公告)日：2007-05-31

申请号：US11668012

申请日：2007-01-29

申请人： Chin-Liang WANG ,  Yuan-Shuo Chang

发明人： Chin-Liang WANG ,  Yuan-Shuo Chang

IPC分类号： H03H7/30 ,  H04L5/12 ,  H04B1/10

CPC分类号： H04L25/03057 ,  H04L27/2647 ,  H04L2025/03617

摘要： A novel time-domain equalizer (TEQ) is provided for the receiver of a Discrete Multi-tone (DMT) system to shorten the length of the effective channel impulse response. The TEQ is based on a variant of the conventional decision-feedback equalizer (DFE) structure along with a training method for the TEQ settings. By using this DFE-based TEQ for DMT systems, the data symbols transmitted through the effective shortened channel would be more reliable.

摘要翻译： 为离散多音调（DMT）系统的接收机提供新颖的时域均衡器（TEQ），以缩短有效信道脉冲响应的长度。 TEQ基于传统的判决反馈均衡器（DFE）结构的变体以及TEQ设置的训练方法。 通过将这种基于DFE的TEQ用于DMT系统，通过有效缩短的信道传输的数据符号将更加可靠。

公开(公告)号：US07200172B2

公开(公告)日：2007-04-03

申请号：US10439068

申请日：2003-05-15

申请人： Markku Pukkila ,  Gian-Paolo Mattellini ,  Pekka A. Ranta

发明人： Markku Pukkila ,  Gian-Paolo Mattellini ,  Pekka A. Ranta

IPC分类号： H03H7/30

CPC分类号： H04L25/0212 ,  H04L25/0328 ,  H04L2025/03484 ,  H04L2025/03617

摘要： A method of operation of a receiver of a mobile station or a base station of a radio access network and corresponding equipment, the method for especial use in providing interference cancellation according to a single antenna interference cancellation (SAIC) algorithm. The method includes a step (22) in which a channel estimator (12) estimates channel impulse response components for use by a SAIC equalizer (14); in estimating the channel impulse response components, the channel estimator (12) minimizes a special cost function (Jch(h)) with respect to the components of the channel impulse response h. In some embodiments, the method uses an iterative least mean squares procedure to minimize the cost function (Jch(h)).

摘要翻译： 一种无线接入网的移动台或基站的接收机操作方法及相应的设备，该方法特别用于根据单天线干扰消除（SAIC）算法提供干扰消除。 该方法包括步骤（22），其中信道估计器（12）估计由SAIC均衡器（14）使用的信道脉冲响应分量; 在估计信道脉冲响应分量时，信道估计器（12）相对于信道脉冲响应h的分量最小化特殊成本函数（J H（h））。 在一些实施例中，该方法使用迭代最小均方程来最小化成本函数（J H（h））。

公开(公告)号：US07184475B2

公开(公告)日：2007-02-27

申请号：US10054551

申请日：2002-01-22

申请人： Ralf Dohmen ,  Christoph Schulien ,  Herbert Haunstein ,  Achim Herzberger ,  Georg Roell ,  Konrad Sticht

发明人： Ralf Dohmen ,  Christoph Schulien ,  Herbert Haunstein ,  Achim Herzberger ,  Georg Roell ,  Konrad Sticht

IPC分类号： H03H7/30 ,  H03K5/159 ,  G06F17/10 ,  H04B3/14

CPC分类号： H04L25/03038 ,  H04L1/0045 ,  H04L25/063 ,  H04L2025/03617

摘要： A method of adjusting equalization parameters in a receiver wherein a bit error rate (BER) in a data stream is measured from the number of corrected bits in data blocks which have an information section and an error correction section. A predetermined equalization parameter is changed, and the bit error rate (BER) after change is again measured to find out how to change the predetermined equalization parameter until an optimum is reached.When adjusting the threshold value of the receiver, the history of occurring bits preceding the actual sampled bit is taken into consideration in that the amount and direction of adjustment is derived from a look-up table.

摘要翻译： 一种在接收机中调整均衡参数的方法，其中根据具有信息部分和纠错部分的数据块中的校正比特数来测量数据流中的误码率（BER）。 改变预定的均衡参数，并且再次测量改变之后的误码率（BER），以找出如何改变预定的均衡参数，直到达到最佳值。 当调整接收机的阈值时，考虑到实际采样位之前出现位的历史，因为从查找表导出调整的量和方向。

公开(公告)号：US07167883B2

公开(公告)日：2007-01-23

申请号：US10320767

申请日：2002-12-16

申请人： Israel Greiss ,  Baruch Bublil ,  Jeffrey Jacob ,  Dimitry Taich

发明人： Israel Greiss ,  Baruch Bublil ,  Jeffrey Jacob ,  Dimitry Taich

IPC分类号： G06F17/10 ,  H03H7/03

CPC分类号： H04B1/0003 ,  H04L1/0054 ,  H04L5/16 ,  H04L7/0004 ,  H04L7/0029 ,  H04L7/0058 ,  H04L7/007 ,  H04L25/03057 ,  H04L25/0307 ,  H04L25/14 ,  H04L2025/0349 ,  H04L2025/03617

摘要： A finite impulse response filter, including a plurality of taps arranged to receive and process a sequence of input data samples so as to generate a filter output. Each tap consists of a multiplier operating in one's complement arithmetic, the multiplier being coupled to multiply a respective input sample from the sequence by a respective equalization coefficient, and an adder, which sums an output from the multiplier. The taps are arranged in sequence so that the input sample to each of the taps, except to a first tap in the sequence, is delayed relative to a preceding tap in the sequence. The filter also includes an adjustment-accumulator coupled to receive the filter output and responsive thereto to generate an adjustment that is adapted to correct the filter output to a twos complement result, and an adjustment-adder which sums the adjustment and the filter output to generate a final output.

摘要翻译： 一种有限脉冲响应滤波器，包括多个抽头，其布置成接收和处理一系列输入数据样本以产生滤波器输出。 每个抽头包括以补码运算运算的乘法器，该乘法器被耦合以将来自该序列的相应输入采样乘以相应的均衡系数，以及将来自乘法器的输出相加的加法器。 抽头按顺序排列，使得除序列中的第一次抽头之外的每个抽头的输入样本相对于序列中的先前抽头而被延迟。 滤波器还包括耦合以接收滤波器输出并对其进行响应的调整 - 累加器，以产生适于将滤波器输出校正为二进制补码结果的调整，以及调整加法器，其将调整和滤波器输出相加以产生 最终输出。

公开(公告)号：US07161980B2

公开(公告)日：2007-01-09

申请号：US10223151

申请日：2002-08-19

申请人： Andreas Dittrich ,  Wolfgang Emil Michael Sauer-Greff ,  Ralph Steffen Urbansky

发明人： Andreas Dittrich ,  Wolfgang Emil Michael Sauer-Greff ,  Ralph Steffen Urbansky

IPC分类号： H03H7/30 ,  H03D1/24

CPC分类号： H03H21/0012 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03617

摘要： A system and method for processing received transmission signal(s) adapted to be used in high rate communication systems without impairing the received signal energy and without additional expensive components. The system and method are adapted to transmission system(s) having at the receiver-side a compound system of a feed-forward equalizer (FFE) and a subsequent decision feedback equalizer (DFE). A feed forward equalization and/or a decision feedback equalization is performed on the received high rate signal by deriving adaptation information from the equalized signal after a signal decision is performed for adjusting all intended feed forward equalization and/or decision feedback equalization coefficients and/or table entries in dependence on said information.

摘要翻译： 一种用于处理适于在高速率通信系统中使用的接收的传输信号的系统和方法，而不损害所接收的信号能量，而不损耗额外的昂贵的组件。 系统和方法适用于在接收机侧具有前馈均衡器（FFE）和随后的判决反馈均衡器（DFE）的复合系统的传输系统。 通过在执行用于调整所有预期的前馈均衡和/或判决反馈均衡系数的信号决定之后从均衡信号中导出适配信息，并对其进行前馈均衡和/或判决反馈均衡。 表条目依赖于所述信息。

公开(公告)号：US20060245487A1

公开(公告)日：2006-11-02

申请号：US11257810

申请日：2005-10-25

申请人： Oscar Agazzi ,  David Kruse ,  Arthur Abnous ,  Mehdi Hatamian

发明人： Oscar Agazzi ,  David Kruse ,  Arthur Abnous ,  Mehdi Hatamian

IPC分类号： H03H7/30

CPC分类号： H04L7/0062 ,  G01R31/3004 ,  G01R31/3008 ,  G01R31/3016 ,  G01R31/31715 ,  G01R31/318502 ,  G01R31/318552 ,  G01R31/318594 ,  H03M13/256 ,  H03M13/41 ,  H03M13/6331 ,  H04B3/23 ,  H04B3/32 ,  H04L1/005 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/242 ,  H04L7/0334 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03146 ,  H04L25/03267 ,  H04L25/067 ,  H04L25/14 ,  H04L25/4917 ,  H04L25/497 ,  H04L2025/03363 ,  H04L2025/03369 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03496 ,  H04L2025/03503 ,  H04L2025/03617 ,  H04L2025/03745

摘要： A method and a system for providing an input signal from a multiple decision feedback equalizer to a decoder based on a tail value and a subset of coefficient values received from a decision-feedback equalizer. A set of pre-computed values based on the subset of coefficient values is generated. Each of the pre-computed values is combined with the tail value to generate a tentative sample. One of the tentative samples is selected as the input signal to the decoder. In one aspect of the system, tentative samples are saturated and then stored in a set of registers before being outputted to a multiplexer which selects one of the tentative samples as the input signal to the decoder. This operation of storing the tentative samples in the registers before providing the tentative samples to the multiplexer facilitates high-speed operation by breaking up a critical path of computations into substantially balanced first and second portions, the first portion including computations in the decision-feedback equalizer and the multiple decision feedback equalizer, the second portion including computations in the decoder.

公开(公告)号：US07110447B2

公开(公告)日：2006-09-19

申请号：US10142108

申请日：2002-05-09

申请人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Sedar Ozen

发明人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Sedar Ozen

IPC分类号： H03H7/30 ,  H04B1/69

CPC分类号： H04L25/0236 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/025 ,  H04L2025/03382 ,  H04L2025/03477 ,  H04L2025/03605 ,  H04L2025/03617 ,  H04L2025/03726 ,  H04L2025/03789

摘要： An impulse response of a channel is estimated by cross-correlating a known training signal with a received training signal to produce a cross-correlation vector. The cross-correlation vector is characterized by a known noise component resulting from the finiteness of the correlation. A correction vector is estimated based on the known training signal, where the correction vector is related to the noise component. Truncated representations of the correction vector are iteratively subtracted from the cross-correlation vector in order to produce a succession of cross-correlation outputs of increased accuracy. When the cross-correlation output is sufficiently accurate, it may be used to determine the weights to be given to the taps of an equalizer.

公开(公告)号：US20060182172A1

公开(公告)日：2006-08-17

申请号：US11230856

申请日：2005-09-20

申请人： Chia-Liang Lin

发明人： Chia-Liang Lin

IPC分类号： H03H7/30

CPC分类号： H04L25/03057 ,  H04L2025/03363 ,  H04L2025/0349 ,  H04L2025/03617

摘要： A feedback equalizer is provided that minimizes the critical path time in a multi-level modulation receiver. The critical path is reduced by parallel operation of some summation components of the feedback equalizer. The critical path is further reduced by pre-computing coefficients for the feedback equalizer. Further, the critical path is reduced using an adaptive feedback equalizer which uses parallelism or pre-computation to calculate the feedback equalization coefficients using an adaptation engine.

公开(公告)号：US20060171451A1

公开(公告)日：2006-08-03

申请号：US11265373

申请日：2005-11-02

申请人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H03K5/159

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04L27/0014 ,  H04L2025/03509 ,  H04L2025/03547 ,  H04L2025/03585 ,  H04L2025/03611 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0065

摘要： An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

公开(公告)号：US20060146925A1

公开(公告)日：2006-07-06

申请号：US10534806

申请日：2003-11-10

申请人： Dagnachew Birru

发明人： Dagnachew Birru

IPC分类号： H03H7/30 ,  H04B1/10

CPC分类号： H03H21/0027 ,  H04L25/03057 ,  H04L25/03082 ,  H04L25/03159 ,  H04L2025/03484 ,  H04L2025/0349 ,  H04L2025/03522 ,  H04L2025/03528 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/0038

摘要： A method for performing equalization on an input signal in a receiver creates multiple delayed samples of the input signal and orthogonally transforms each of the delayed input samples before weighting them using transformed adaptive coefficients. The weighted orthogonally-transformed delayed input samples are summed along with a feedback signal and the result is output as the equalizer output signal. In a first exemplary embodiment, the feedback signal is formed from delayed samples of a receiver decision signal, which are orthogonally transformed, then weighted using transformed adaptive coefficients, and finally summed and fed back as feedback signal. In a second exemplary embodiment, the feedback signal is formed from delayed samples of a receiver decision signal, which are weighted using adaptive coefficients, and finally summed and fed back as the feedback signal.

摘要翻译： 用于对接收机中的输入信号执行均衡的方法产生输入信号的多个延迟采样，并且在使用变换后的自适应系数对它们进行加权之前对每个延迟输入样本进行正交变换。 将加权的正交变换的延迟输入样本与反馈信号一起求和，并将结果作为均衡器输出信号输出。 在第一示例性实施例中，反馈信号由接收机判决信号的延迟样本形成，接收器判决信号被正交变换，然后使用变换的自适应系数进行加权，并且最后相加并反馈为反馈信号。 在第二示例性实施例中，反馈信号由接收器判定信号的延迟采样形成，接收器判定信号使用自适应系数进行加权，最后相加并反馈为反馈信号。