公开(公告)号：US08831149B2

公开(公告)日：2014-09-09

申请号：US12553855

申请日：2009-09-03

申请人： Bahadir Canpolat ,  Farrokh Abrishamkar ,  Divaydeep Sikri

发明人： Bahadir Canpolat ,  Farrokh Abrishamkar ,  Divaydeep Sikri

IPC分类号： H04L27/06 ,  H04L25/03

CPC分类号： H04L25/03178 ,  H04L25/0328

摘要： A novel symbol estimation method produces intersymbol interference free symbols by detecting interfering symbols in an interfering channel. A channel estimate is refined for additional improvements. The method can lends itself as a serial or parallel algorithm implementation. The symbol estimation method includes using an initial estimate of received symbols and calculating a refined estimate of the received symbols using a channel estimate. The refined estimate is calculated by performing parameterization of intersymbol interference by symbols other than the symbol being refined and selecting a refined value for the symbol being refined by evaluating an optimization function. Symbol estimates are refined in multiple iterations, until a predetermined iteration termination criterion is met. Parameterization of ISI contribution of other symbols results in reduced computation by reducing total number of unknown variables in the refinement operation.

摘要翻译： 新颖的符号估计方法通过检测干扰信道中的干扰符号来产生符号间无干扰码元。 改进渠道估算值以进行其他改进。 该方法可以作为串行或并行算法实现。 符号估计方法包括使用接收到的符号的初始估计并使用信道估计来计算接收到的符号的精细估计。 精确估计是通过对符号进行改进的符号进行符号间干扰的参数化来计算的，并通过评估优化函数来选择要精炼的符号的精细值。 符号估计在多个迭代中被精炼，直到满足预定的迭代终止标准。 其他符号的ISI贡献的参数化导致通过减少细化操作中未知变量的总数来减少计算。

公开(公告)号：US08396440B2

公开(公告)日：2013-03-12

申请号：US12820958

申请日：2010-06-22

申请人： Bahadir Canpolat ,  Ming Yan ,  Farrokh Abrishamkar ,  Divaydeep Sikri

发明人： Bahadir Canpolat ,  Ming Yan ,  Farrokh Abrishamkar ,  Divaydeep Sikri

IPC分类号： H04B1/10

CPC分类号： H04L25/0328 ,  H04L25/0242 ,  H04L25/03292 ,  H04L2025/03726

摘要： A signal reception method includes receiving a signal over a channel, producing a first equalized signal, a first interference suppression filter and a first estimate of the channel using a portion of a the received signal, dividing the received signal into a plurality of signal blocks, and for each one of the plurality of signal blocks, producing a second equalized signal using a portion of the first equalized signal by selecting from one of a linear estimator or a non-linear estimator and estimating symbols received in the one of the plurality of signal blocks based on the second equalized signal.

摘要翻译： 信号接收方法包括通过信道接收信号，使用接收信号的一部分产生第一均衡信号，第一干扰抑制滤波器和信道的第一估计，将接收信号分成多个信号块， 并且对于所述多个信号块中的每一个，使用所述第一均衡信号的一部分，通过从线性估计器或非线性估计器之一中选择并估计在所述多个信号中的一个信号中接收的符号来产生第二均衡信号 基于第二均衡信号的块。

公开(公告)号：US08331504B2

公开(公告)日：2012-12-11

申请号：US12435076

申请日：2009-05-04

申请人： Yingqun Yu ,  Farrokh Abrishamkar ,  Divaydeep Sikri ,  Michael McCloud

发明人： Yingqun Yu ,  Farrokh Abrishamkar ,  Divaydeep Sikri ,  Michael McCloud

IPC分类号： H03D1/04

CPC分类号： H04B1/7107 ,  H04B1/71052 ,  H04B2201/70701

摘要： Systems and methods for multi-user interference cancellation are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users and a detection unit configured to detect user symbols from the received symbols. The apparatus also comprises an interference cancellation unit configured to compute multi-user interference using the detected user symbols and to remove the computed multi-user interference from the received symbols. The apparatus further comprises a redetection unit configured to redetect user symbols from the received symbols with the computed multi-user interference removed.

摘要翻译： 提供了多用户干扰消除的系统和方法。 在本公开的一个方面，提供一种装置。 该装置包括：处理单元，被配置为将接收到的码片处理为多个用户的接收符号;以及检测单元，被配置为从接收的符号检测用户符号。 该装置还包括被配置为使用检测到的用户符号来计算多用户干扰并从所接收的符号中去除所计算的多用户干扰的干扰消除单元。 所述设备还包括重新检测单元，其被配置为从所接收的符号中重新检测用户符号，同时移除所计算的多用户干扰。

公开(公告)号：US20110051864A1

公开(公告)日：2011-03-03

申请号：US12553848

申请日：2009-09-03

申请人： Raghu N. Chalia ,  Bahadir Canpolat ,  Farrokh Abrishamkar ,  Divaydeep Sikri

发明人： Raghu N. Chalia ,  Bahadir Canpolat ,  Farrokh Abrishamkar ,  Divaydeep Sikri

IPC分类号： H04B1/10

CPC分类号： H04L25/0328 ,  H04L25/0202 ,  H04L25/03286 ,  H04L25/03292 ,  H04L25/03299 ,  H04L2025/03726

摘要： A multi-stage interference suppression receiver includes a short equalizer section configured to operate on a first portion of a received signal received over a channel to produce a first equalized signal and a first estimate of the channel, a channel estimator section configured to operate on the first equalized signal to produce a second equalized signal, the channel estimator section comprising a linear estimator and a non-linear estimator, a long equalizer section configured to operate on a second portion of the received signal to produce a first estimate of symbols in the received signal and a second estimate of the channel and an interference canceller section configured to operate on the first estimate of symbols in the received signal to generate a second estimate of symbols in the received signal based on, at least in part, the second estimate of the channel.

摘要翻译： 多级干扰抑制接收机包括短均衡器部分，其被配置为对通过信道接收的接收信号的第一部分进行操作以产生第一均衡信号和信道的第一估计，信道估计器部分被配置为在 第一均衡信号以产生第二均衡信号，所述信道估计器部分包括线性估计器和非线性估计器，长均衡器部分，被配置为在所接收信号的第二部分上操作以产生所接收的符号的第一估计值 信号和信道的第二估计以及干扰消除器部分，被配置为在接收信号中对符号的第一估计进行操作，以至少部分地基于接收信号的第二估计来生成接收信号中的符号的第二估计 渠道。

公开(公告)号：US20100278227A1

公开(公告)日：2010-11-04

申请号：US12433200

申请日：2009-04-30

申请人： Divaydeep Sikri ,  Farrokh Abrishmkar ,  Nico De Laurentiis

发明人： Divaydeep Sikri ,  Farrokh Abrishmkar ,  Nico De Laurentiis

IPC分类号： H04L1/00 ,  H03H7/30

CPC分类号： H04L25/03292 ,  H04L2025/03426

摘要： Systems and methods of receiving data in a communication system are disclosed. The methods include equalizing a plurality of samples to suppress intersymbol interference and provide a first set of detected bits based on a first set of reference bits comprising a training sequence on a first iteration. The methods further include suppressing co-channel interference in the plurality of input samples and provide a set of suppressed samples based on a second set of reference bits comprising the first set of detected bits on a second iteration. The methods further include equalizing the set of suppressed samples to suppress intersymbol interference and provide a second set of detected bits based on the second set of reference bits on the second iteration.

摘要翻译： 公开了在通信系统中接收数据的系统和方法。 所述方法包括均衡多个采样以抑制符号间干扰，并且基于在第一次迭代中包括训练序列的第一组参考比特来提供第一组检测到的比特。 所述方法还包括抑制多个输入样本中的同信道干扰，并且在第二次迭代中基于包括第一组检测到的比特的第二组参考比特提供一组抑制样本。 所述方法还包括均衡所述抑制样本集合以抑制符号间干扰，并且基于所述第二迭代上的第二组参考比特提供第二组检测到的比特。

公开(公告)号：US20100046595A1

公开(公告)日：2010-02-25

申请号：US12193925

申请日：2008-08-19

申请人： Divaydeep Sikri ,  Erdogan Dede ,  Farrokh Abrishamkar ,  Philip J.C. Children ,  Nico De Laurentiis

发明人： Divaydeep Sikri ,  Erdogan Dede ,  Farrokh Abrishamkar ,  Philip J.C. Children ,  Nico De Laurentiis

IPC分类号： H04B17/00

CPC分类号： H04W56/00 ,  H04L7/041 ,  H04L25/0228 ,  H04L25/0328

摘要： A method for estimating timing in a wireless communication comprises the steps of receiving a plurality of symbol bursts corresponding to a plurality of time slots and selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts. The subset comprises a first midamble symbol. The method further comprises the steps of calculating, for each symbol in the subset, a corresponding midamble estimation error, and determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst. The method further comprises the steps of processing the first symbol burst utilizing the timing determined for the first symbol burst, and processing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst.

摘要翻译： 一种用于估计无线通信定时的方法包括以下步骤：接收与多个时隙相对应的多个符号突发，并从所述多个符号突发的第一符号突发中选择符号子集。 子集包括第一中间码符号。 所述方法还包括以下步骤：针对所述子集中的每个符号计算相应的中间码估计误差，以及确定所计算出的最低中值码估计误差以确定所述第一符号突发的定时。 该方法还包括以下步骤：利用为第一符号突发确定的定时来处理第一符号突发，以及利用为第一符号突发确定的定时来处理多个符号突发的第二符号突发。

公开(公告)号：US08804881B2

公开(公告)日：2014-08-12

申请号：US13181268

申请日：2011-07-12

申请人： Zhi-Zhong Yu ,  Divaydeep Sikri

发明人： Zhi-Zhong Yu ,  Divaydeep Sikri

IPC分类号： H03D1/00

CPC分类号： H04L25/03331 ,  H04L25/0328 ,  H04L25/03318

摘要： Data communication devices, methods, and systems are discussed in this application. In one embodiment, a receiving apparatus generally comprises a detector, an indicator, and a decision device. The detector can detect a number of data streams contained in a signal received on a single physical channel. Detection can be made by comparing a received signal with one or more predetermined sequences and identifying one or more of the plural predetermined sequences as being likely contained within the received signal. Each data stream can be associated with at least one predetermined sequences. The indicator can provide an indication of the data streams likely contained in the signal based on the identified sequences. A decision device can provide data defining a receiver configuration based on the indication, the receiver configuration being suitable for configuring a decoder to decode only the one or more data streams indicated as being likely contained in the signal. Other aspects, embodiments, and features are also claimed and discussed.

摘要翻译： 本应用中讨论了数据通信设备，方法和系统。 在一个实施例中，接收设备通常包括检测器，指示器和判定设备。 检测器可以检测包含在单个物理信道上接收的信号中的数据流。 可以通过将接收到的信号与一个或多个预定序列进行比较来识别可能包含在接收信号中的多个预定序列中的一个或多个来进行检测。 每个数据流可以与至少一个预定的序列相关联。 指示符可以基于所识别的序列来提供信号中可能包含的数据流的指示。 决策设备可以基于指示来提供定义接收机配置的数据，接收机配置适于配置解码器以仅解码指示为可能包含在信号中的一个或多个数据流。 还要求和讨论其它方面，实施例和特征。

公开(公告)号：US08675796B2

公开(公告)日：2014-03-18

申请号：US13215984

申请日：2011-08-23

申请人： Divaydeep Sikri ,  Farrokh Abrishamkar ,  Ming Yan ,  Nico De Laurentiis

发明人： Divaydeep Sikri ,  Farrokh Abrishamkar ,  Ming Yan ,  Nico De Laurentiis

IPC分类号： H04B1/10 ,  H04L27/00

CPC分类号： H04W56/00 ,  H04B7/02

摘要： A method for timing and frequency synchronization in a wireless system is provided. The method comprises the steps of receiving a burst of symbols, selecting a subset of the burst of symbols, iteratively adjusting the subset of the burst of symbols by a plurality of timing offsets and calculating, for each timing offset, a first performance metric corresponding to the adjusted subset. The method further comprises the steps of determining one of the plurality of timing offsets to be a preferred timing offset based upon the first performance metric thereof, iteratively rotating the subset of the burst of symbols by a plurality of frequency offsets and calculating, for each frequency offset, a second performance metric corresponding to the rotated subset, and determining one of the plurality of frequency offsets to be a preferred frequency offset based upon the second performance metric thereof.

摘要翻译： 提供了一种用于无线系统中的定时和频率同步的方法。 该方法包括以下步骤：接收符号脉冲串，选择符号脉冲串的子集，通过多个定时偏移迭代地调整符号脉冲串的子集，并且针对每个定时偏移量，计算对应于 调整后的子集。 该方法还包括以下步骤：基于其第一性能度量，将多个定时偏移中的一个定时偏移确定为优选的定时偏移，将符号突发的子集迭代地旋转多个频率偏移，并且针对每个频率 偏移量，对应于旋转的子集的第二性能量度，以及基于其第二性能度量，将所述多个频率偏移中的一个确定为优选频率偏移。

公开(公告)号：US20130294551A1

公开(公告)日：2013-11-07

申请号：US13464695

申请日：2012-05-04

申请人： Divaydeep Sikri

发明人： Divaydeep Sikri

IPC分类号： H04L27/06 ,  G06F11/10 ,  H03M13/23 ,  H04W88/02 ,  H04W88/08

CPC分类号： H03M13/41 ,  H03M13/09 ,  H03M13/23 ,  H03M13/3707 ,  H03M13/3723 ,  H04L1/0054

摘要： Decoders and communications devices including such decoders can obtain a convolutional coded bit stream including a plurality of coded data bits. The convolutional coded bit stream may be coded according to one or more generator polynomials such that each information bit is related to two or more coded data bits in a manner to be determinable from a mathematical combination of the two or more coded data bits of the convolutional coded bit stream. A priori information associated with each information bit can be calculated based at least in part on the mathematical combination of the two or more coded data bits. Employing the a priori information, a binary value for each information bit can be calculated. Other aspects, embodiments, and features are also claimed and described.

摘要翻译： 包括这种解码器的解码器和通信设备可以获得包括多个编码数据位的卷积编码比特流。 卷积编码比特流可以根据一个或多个生成多项式进行编码，使得每个信息比特以两个或多个编码数据比特相关，可以从卷积的两个或更多个编码数据比特的数学组合来确定 编码比特流。 可以至少部分地基于两个或更多个编码数据位的数学组合来计算与每个信息位相关联的先验信息。 使用先验信息，可以计算每个信息位的二进制值。 还要求和描述其它方面，实施例和特征。

公开(公告)号：US08576743B2

公开(公告)日：2013-11-05

申请号：US13333550

申请日：2011-12-21

申请人： Divaydeep Sikri ,  Hassan Rafique ,  Cetin Altan

发明人： Divaydeep Sikri ,  Hassan Rafique ,  Cetin Altan

IPC分类号： G01R31/08

CPC分类号： H04L27/22 ,  H04L1/20 ,  H04L2027/0065 ,  H04L2027/0091 ,  H04L2027/0095

摘要： Estimating an unknown frequency error of a tone signal may comprise sampling, within an error bandwidth, wireless signals including the tone signal that occupy the error bandwidth to generate signal samples, and repeatedly, for different frequency offsets: applying a frequency offset to the signal samples to produce offset values that represent the signals occupying an offset bandwidth equal to the error bandwidth offset by an offset frequency; estimating, within a frequency estimation range less than the error bandwidth, a tone frequency error using the offset values; and measuring a signal-to-noise ratio of the tone signal using the signal samples and the estimated tone frequency error. Other aspects, embodiments, and features are also claimed and discussed.

摘要翻译： 估计音调信号的未知频率误差可以包括在误差带宽内对包括占据误差带宽的音调信号的无线信号进行采样以产生信号采样，并且针对不同的频率偏移重复采样：对信号采样应用频率偏移 以产生表示占据偏移频带等于误差带宽偏移的偏移带宽的信号的偏移值; 在小于误差带宽的频率估计范围内，使用偏移值估计音调频率误差; 以及使用信号样本和估计的音频误差来测量音调信号的信噪比。 还要求和讨论其它方面，实施例和特征。