公开(公告)号：US20140328380A1

公开(公告)日：2014-11-06

申请号：US13995410

申请日：2011-12-29

申请人： Evgeny Pustovalov ,  Andrey Turlikov

发明人： Evgeny Pustovalov ,  Andrey Turlikov

IPC分类号： H04L25/03

CPC分类号： H04L25/03885 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0238 ,  H04L25/03159 ,  H04L25/03171 ,  H04L2025/03414 ,  H04L2025/03535 ,  H04L2025/03611 ,  H04L2025/0363 ,  H04L2025/03636 ,  H04L2025/03675 ,  H04L2025/03687 ,  H04L2025/03726

摘要： Frequency domain based methods and systems to perform adaptive multi-mode pre-decoding linear equalization, adaptive channel estimation, turbo equalization, turbo equalization iteration control, and noise variance estimation. An adaptive linear pre-decoder equalizer may include a multi-mode equalizer, which may include a blind equalizer to determine initial equalization coefficients and a decision-directed equalizer to refine the initial equalization coefficients. Turbo equalization may include a dynamic iteration termination criterion and/or a fixed termination criterion. Turbo equalization may be based in part on an adaptive estimated noise variance. Methods and systems disclosed herein may be implemented with respect to single-carrier signals such as digital video broadcast signals.

摘要翻译： 基于频域的方法和系统执行自适应多模式预解码线性均衡，自适应信道估计，Turbo均衡，Turbo均衡迭代控制和噪声方差估计。 自适应线性预解码器均衡器可以包括多模均衡器，其可以包括用于确定初始均衡系数的盲均衡器和用于细化初始均衡系数的判决引导均衡器。 Turbo均衡可以包括动态迭代终止标准和/或固定终止标准。 Turbo均衡可以部分地基于自适应估计噪声方差。 本文公开的方法和系统可以针对诸如数字视频广播信号的单载波信号来实现。

公开(公告)号：US08654884B2

公开(公告)日：2014-02-18

申请号：US13087168

申请日：2011-04-14

申请人： Benjamin James Kerr

发明人： Benjamin James Kerr

IPC分类号： H04B15/00

CPC分类号： H04L25/03057 ,  H04L25/03343 ,  H04L25/03885 ,  H04L2025/03535

摘要： A method and circuit for performing channel equalization in a high speed transmission system comprising a transmitter and receiver. An application specific digital signal processor, ASDSP, performs channel equalization and compensation on digital data received from an analogue-to digital converter of the receiver. The ASDSP is operable to execute an application specific set of op-codes needed for performing channel equalization and compensation. An ASDSP register is coupled between the ASDSP and a system CPU in a feedback loop for performing channel equalization at the receiver. The ASDSP stores equalizer parameters and bit error rate measurements used by the ASDSP for performing channel equalization and compensation. An ASDSP program storage memory, coupled to and accessible by the ASDSP, stores an ASDSP micro-sequence program for controlling the processing steps for channel equalization and dataflow through the ASDSP.

摘要翻译： 一种用于在包括发射机和接收机的高速传输系统中执行信道均衡的方法和电路。 应用专用数字信号处理器ASDSP对从接收机的模数转换器接收的数字数据进行信道均衡和补偿。 ASDSP可操作以执行用于执行信道均衡和补偿所需的特定应用操作码集合。 ASDSP寄存器耦合在ASDSP和用于在接收器处执行信道均衡的反馈回路中的系统CPU之间。 ASDSP存储ASDSP用于执行信道均衡和补偿的均衡器参数和误码率测量。 ASDSP程序存储器，耦合到和可由ASDSP访问，存储用于通过ASDSP控制用于信道均衡和数据流的处理步骤的ASDSP微程序程序。

公开(公告)号：US20130114770A1

公开(公告)日：2013-05-09

申请号：US13576092

申请日：2010-12-23

申请人： Maryline Helard ,  Matthieu Crussiere ,  Karima Ragoubi

发明人： Maryline Helard ,  Matthieu Crussiere ,  Karima Ragoubi

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H04L25/0216 ,  H04L25/03019 ,  H04L2025/03535 ,  H04L2025/0377

摘要： A method and apparatus are provided for reducing a channel length. The method implements a channel-length reduction filter that takes into account a pulse response of the channel. The method includes the following steps: cutting the filter into at least one first and one second portion; optimizing said first portion of the filter according to a first criterion in order to output a first set of filtering coefficients; reducing the length of the channel by optimizing said second portion of the filter according to a second criterion different from the first one and based on the first set of filtering coefficients of said first portion of the filter in order to output a second set of filtering coefficients.

摘要翻译： 提供了一种减少通道长度的方法和装置。 该方法实现了考虑通道的脉冲响应的信道长度减小滤波器。 该方法包括以下步骤：将过滤器切割成至少一个第一和第二部分; 根据第一标准优化滤波器的第一部分以便输出第一组滤波系数; 通过根据与第一标准不同的第二标准优化滤波器的第二部分并且基于滤波器的所述第一部分的第一组滤波系数来减小信道的长度，以便输出第二组滤波系数 。

公开(公告)号：US08325790B2

公开(公告)日：2012-12-04

申请号：US12534359

申请日：2009-08-03

申请人： Haim Primo ,  Yosef Stein ,  Wei An

发明人： Haim Primo ,  Yosef Stein ,  Wei An

IPC分类号： H03H7/00 ,  H04J11/00

CPC分类号： H04L25/0212 ,  H04L25/0218 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03535 ,  H04L2025/03726

摘要： The problem of inefficient channel impulse-response processing is addressed by processing different parts of a channel impulse response to accurately locate channel taps, and to generate more than one set of equalization coefficients. This allows the most-suited equalization coefficient to be selected based on a selection criterion.

摘要翻译： 通过处理信道脉冲响应的不同部分来精确地定位信道抽头并产生多于一组的均衡系数来解决低效率信道脉冲响应处理的问题。 这允许基于选择标准来选择最合适的均衡系数。

公开(公告)号：US08290024B2

公开(公告)日：2012-10-16

申请号：US11151104

申请日：2005-06-13

申请人： Ashwin Sampath ,  Toshio Nagata

发明人： Ashwin Sampath ,  Toshio Nagata

IPC分类号： H04B1/69

CPC分类号： H04L25/03019 ,  H04B1/707 ,  H04B2201/70701 ,  H04L2025/03535 ,  H04L2025/03783 ,  H04L2025/03808

摘要： Methods and apparatus to facilitate improve code division multiple access (CDMA) receivers are disclosed. An example method disclosed herein comprises: receiving a signal containing first portions that are based on known data and second portions that are based on unknown data; generating a training signal, from the received signal, that substantially represents one or more of the first portions; adapting filter coefficients using the training signal; and equalizing the received signal using the adapted filter coefficients.

摘要翻译： 公开了促进改进码分多址（CDMA）接收机的方法和装置。 本文公开的示例性方法包括：接收包含基于已知数据的第一部分的信号和基于未知数据的第二部分; 从所接收的信号产生基本上代表所述第一部分中的一个或多个的训练信号; 使用训练信号调整滤波器系数; 以及使用适配的滤波器系数来均衡所接收的信号。

公开(公告)号：US08180005B2

公开(公告)日：2012-05-15

申请号：US12096641

申请日：2006-11-07

申请人： Ju-Yeun Kim ,  Young-Su Kim ,  Jae-Hwui Bae ,  Hyun Lee ,  Jong-Soo Lim ,  Soo-In Lee

发明人： Ju-Yeun Kim ,  Young-Su Kim ,  Jae-Hwui Bae ,  Hyun Lee ,  Jong-Soo Lim ,  Soo-In Lee

IPC分类号： H04B7/10

CPC分类号： H04B7/0814 ,  H04L25/03012 ,  H04L2025/03426 ,  H04L2025/03535

摘要： Provided are an apparatus and method for selecting an optimal signal using auxiliary equalization in a diversity receiver. The optimal signal selecting apparatus includes: a plurality of sync recovery units for extracting sync information from baseband signals, which are candidate signals, except a baseband signal selected as a current optimal signal a plurality of auxiliary equalizers for channel-equalizing the candidate signals based on the extracted sync information; a plurality of SNR measuring units for measuring signal-to-noise ratios (SNRs) of the candidate signals inputted to the auxiliary equalizers and the candidates signals equalized in the auxiliary equalizers; and an optimal signal selector for selecting an optimal candidate signal from the candidate signals by using the extracted sync information and the measured SNRs, and replacing the optimal signal with the optimal candidate signal when reception quality of the current optimal signal is poor.

摘要翻译： 提供了一种用于在分集接收机中使用辅助均衡来选择最佳信号的装置和方法。 最佳信号选择装置包括：多个同步恢复单元，用于从作为候选信号的基带信号中提取同步信息，除了选择为当前最优信号的基带信号，多个辅助均衡器，用于对候选信号进行信道均衡，基于 提取的同步信息; 多个SNR测量单元，用于测量输入到辅助均衡器的候选信号的信噪比（SNR）和在辅助均衡器中均衡的候选信号; 以及最优信号选择器，用于通过使用所提取的同步信息和测量的SNR从候选信号中选择最佳候选信号，并且当当前最佳信号的接收质量差时，用最佳候选信号替换最佳信号。

公开(公告)号：US07433432B2

公开(公告)日：2008-10-07

申请号：US11027102

申请日：2004-12-31

申请人： Min Chuin Hoo

发明人： Min Chuin Hoo

IPC分类号： H04L1/02

CPC分类号： H04B7/0891 ,  H04B7/0413 ,  H04B7/0848 ,  H04L1/206 ,  H04L25/03216 ,  H04L2025/03426 ,  H04L2025/03535

摘要： An adaptive, reduced-complexity soft-output maximum-likelihood detector that is operable to process data by adaptively selecting a processing scheme based on a determination of signal quality. The signal quality is derived as a function of the noise, the modulation format, the channel (the communication environment), the transmit signal power and the receive signal power. If the signal quality is low, the signal is processed using a maximum likelihood detector. If, however, the signal quality is high, a simpler sub-optimal detector is used. By estimating the signal quality and choosing an appropriate detection method, the present invention ensures accurate detection of incoming data signals in a MIMO communication system while maintaining the highest possible processing speed.

摘要翻译： 一种自适应，低复杂度的软输出最大似然检测器，其可操作以通过基于信号质量的确定自适应地选择处理方案来处理数据。 信号质量作为噪声，调制格式，信道（通信环境），发射信号功率和接收信号功率的函数导出。 如果信号质量低，则使用最大似然检测器处理信号。 然而，如果信号质量高，则使用更简单的次优检测器。 通过估计信号质量并选择适当的检测方法，本发明在保持尽可能高的处理速度的同时确保在MIMO通信系统中准确检测输入数据信号。

公开(公告)号：US07321632B2

公开(公告)日：2008-01-22

申请号：US10673267

申请日：2003-09-30

申请人： Yona Perets ,  Daniel Yellin

发明人： Yona Perets ,  Daniel Yellin

IPC分类号： H04L5/12

CPC分类号： H04L25/03006 ,  H04B7/08 ,  H04L25/03178 ,  H04L2025/03535 ,  H04L2025/03605 ,  H04L2025/03726

摘要： Embodiments of the present invention provide a method, apparatus and system for detecting a transmitted signal according to a detection algorithm selected from two or more detection algorithms based on a predetermined selection criterion.

摘要翻译： 本发明的实施例提供了一种根据从两个或更多个检测算法中选出的基于预定选择标准的检测算法检测发送信号的方法，装置和系统。

公开(公告)号：US20070153942A1

公开(公告)日：2007-07-05

申请号：US11325751

申请日：2006-01-05

申请人： Huaiyu Zeng ,  Jie Lai ,  Yueheng Sun ,  Nelson Sollenberger ,  Arie Heiman ,  Yossy Pruzanski

发明人： Huaiyu Zeng ,  Jie Lai ,  Yueheng Sun ,  Nelson Sollenberger ,  Arie Heiman ,  Yossy Pruzanski

IPC分类号： H04L27/06

CPC分类号： H04L25/0328 ,  H04B1/1027 ,  H04B1/707 ,  H04L2025/03407 ,  H04L2025/03535

摘要： Aspects of a method and system for decoding single antenna interference cancellation (SAIC) and redundancy processing adaptation using frame process are provided. A receiver may decode video, voice, and/or speech bit sequences based on a first decoding algorithm that may utilize data redundancy and that may impose physical constraints. The receiver may also decode a bit sequence based on a second decoding algorithm that utilizes SAIC. The first and second decoding algorithms may be adapted to perform in parallel and a decoded received bit sequence may be selected based on a redundancy verification parameter. The first and second decoding algorithms may also be adapted to be performed sequentially where the subsequent decoding operation may be conditioned to the initial decoding operation. Moreover, either the first or the second decoding algorithm may be selected for decoding the received bit sequence. The selection may be based on noise and/or interference measurements.

摘要翻译： 提供了使用帧处理解码单天线干扰消除（SAIC）和冗余处理适配的方法和系统的方面。 接收机可以基于可以利用数据冗余并且可能施加物理约束的第一解码算法来解码视频，语音和/或语音比特序列。 接收机还可以基于利用SAIC的第二解码算法来解码比特序列。 第一和第二解码算法可以适于并行执行，并且可以基于冗余验证参数来选择解码的接收的比特序列。 第一和第二解码算法也可以适于顺序地执行，其中随后的解码操作可以被调节到初始解码操作。 此外，可以选择第一或第二解码算法来解码所接收的比特序列。 该选择可以基于噪声和/或干扰测量。

公开(公告)号：US07130345B2

公开(公告)日：2006-10-31

申请号：US10251733

申请日：2002-09-20

申请人： Fernando A. Mujica ,  Arthur John Redfern

发明人： Fernando A. Mujica ,  Arthur John Redfern

IPC分类号： H03H7/30

CPC分类号： H04L25/03006 ,  H04L2025/03414 ,  H04L2025/03535

摘要： A number of basic equalization and demodulation structures have been shown to be appropriate for DMT systems depending on the channel, noise, and system parameters. These include single path, dual path, oversampled, and double rate structures. Using the fundamental computation units of two TEQs (FIR filters) and two FFTs, in conjunction with simple delays, downsampling and routing, single path, dual path, oversampled and double rate equalization structures can be realized from a common equalization structure.

摘要翻译： 根据信道，噪声和系统参数，已经显示出许多基本的均衡和解调结构适用于DMT系统。 这些包括单路径，双路径，过采样和双速率结构。 使用两个TEQ（FIR滤波器）和两个FFT的基本计算单元，结合简单的延迟，下采样和路由，可以从公共均衡结构实现单路径，双路径，过采样和双速率均衡结构。