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公开(公告)号：US08599677B2
公开(公告)日：2013-12-03
申请号：US12435114
申请日：2009-05-04
申请人： Wenjun Li , Yingqun Yu , Farrokh Abrishamkar , Divaydeep Sikri , Insung Kang
发明人： Wenjun Li , Yingqun Yu , Farrokh Abrishamkar , Divaydeep Sikri , Insung Kang
IPC分类号： H04J11/00
CPC分类号： H04B1/71052
摘要： Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, 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 computation unit configured to compute a multi-user matrix using a Hadamard matrix, wherein the multi-user matrix relates user symbols for the plurality of users to the received symbols. The apparatus further comprises a detection unit configured to detect the user symbols for the plurality of users using the received symbols and the computed multi-user matrix.
摘要翻译： 提供了一种用于多访问系统中多用户检测的系统和方法。 一方面，提供了一种装置。 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;以及计算单元，被配置为使用哈达玛矩阵来计算多用户矩阵，其中多用户矩阵涉及多个用户的用户符号 到收到的符号。 所述装置还包括检测单元，被配置为使用所接收的符号和所计算的多用户矩阵来检测所述多个用户的用户符号。
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公开(公告)号：US08509293B2
公开(公告)日：2013-08-13
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： H04B3/46
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。
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公开(公告)号：US08503591B2
公开(公告)日：2013-08-06
申请号：US12193995
申请日：2008-08-19
IPC分类号： H04B1/10
CPC分类号： H04W56/00
摘要： A method for suppressing interference in a wireless communication is provided. The method comprises receiving a burst of symbols, generating a plurality of timing hypotheses for the burst of symbols, and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis, filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights, and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols based upon the selected one of the plurality of timing hypotheses.
摘要翻译： 提供了一种用于抑制无线通信中的干扰的方法。 该方法包括：接收符号脉冲串，产生符号脉冲串的多个定时假设，以及基于符号脉冲串的子集，针对每个时序假设计算干扰抑制滤波器的多个权重。 该方法还包括对于每个时序假设，使用具有对应的多个权重的干扰抑制滤波器对符号突发的子集进行滤波，并且选择与选择标准相对应的多个定时假设之一。 该方法还包括基于所选择的多个定时假设之一来均衡和解码经过滤波的符号突发。
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公开(公告)号：US20130148711A1
公开(公告)日：2013-06-13
申请号：US13493203
申请日：2012-06-11
IPC分类号： H04L27/01
CPC分类号： H04L27/01 , H04L25/0202 , H04L25/03012
摘要： A two stage interference cancellation (IC) process includes a linear IC stage that suppresses co-channel interference (CCI) and adjacent channel interference (ACI). The linear IC stage disambiguates otherwise super-trellis data for non-linear cancellation. Soft linear IC processing is driven by a-posteriori probability (Apop) information. A second stage performs expectation maximization/Baum Welch (EM-BW) processing that reduces residual ISI left over from the first stage and also generates the Apop which drives the soft linear IC in an iterative manner.
摘要翻译： 两级干扰消除（IC）处理包括抑制同信道干扰（CCI）和相邻信道干扰（ACI）的线性IC级。 线性IC阶段消除了非线性消除的超网格数据。 软线性IC处理由后验概率（Apop）信息驱动。 第二级执行预期最大化/ Baum Welch（EM-BW）处理，其减少从第一级剩余的剩余ISI，并且还产生以迭代方式驱动软线性IC的Apop。
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公开(公告)号：US20110305303A1
公开(公告)日：2011-12-15
申请号：US13215984
申请日：2011-08-23
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。
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16.发明授权Coherent single antenna interference cancellation for GSM/GPRS/EDGE 有权用于GSM / GPRS / EDGE的相干单天线干扰消除公开(公告)号：US07933256B2
公开(公告)日：2011-04-26
申请号：US12038724
申请日：2008-02-27
IPC分类号： H04J3/06
CPC分类号： H04L7/042 , H04L7/048 , H04L25/0228
摘要： A method for midamble estimation comprises the steps of receiving a burst of symbols, selecting a subset of the burst of symbols that comprises a first midamble symbol, calculating, for each symbol in the subset, a corresponding midamble estimation error, and determining the lowest calculated midamble estimation error to locate the first midamble symbol. A receiver comprises an antenna configured to receive a burst of symbols, a timing estimator configured to select a subset of the burst of symbols that comprises a first midamble symbol, a midamble estimator configured to calculate, for each symbol in the subset, a corresponding midamble estimation error, and a processor configured to select the symbol in the subset corresponding to a lowest calculated midamble estimation error as the first midamble symbol.
摘要翻译： 一种用于中间码估计的方法包括以下步骤：接收符号脉冲串，选择包括第一中间码符号的符号突发的子集，为该子集中的每个符号计算相应的中间码估计误差，以及确定最低计算 中间码估计误差来定位第一个midamble符号。 接收机包括被配置为接收符号突发的天线，定时估计器，被配置为选择包括第一中间码符号的符号突发的子集，中间码估计器，被配置为针对子集中的每个符号计算相应的中间码 估计误差，以及被配置为选择对应于最低计算的中间码估计误差的子集中的符号作为第一中间码符号的处理器。
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17.发明授权Advanced interference cancellation for precoded GSM edge radio access network (GERAN) 有权预编码GSM边缘无线接入网（GERAN）的高级干扰消除公开(公告)号：US08737499B2
公开(公告)日：2014-05-27
申请号：US13477288
申请日：2012-05-22
CPC分类号： H04B7/005 , H04L25/022 , H04L25/03012 , H04L25/03159 , H04L25/03821
摘要： An interference cancellation receiver for a pre-coded orthogonal frequency division multiplexed (OFDM) based system combines temporal interference cancellation within the OFDM framework. Multi-path equalization and inter-symbol interference (ISI) cancellation are performed on a time domain channel estimate of a received signal. An output from the multi-path equalization is transformed to the frequency domain. Inter-channel interference (ICI) is performed in the frequency domain on an equalized signal from the multi-path equalization after transforming the equalized signal from the time domain to the frequency domain.
摘要翻译： 用于基于预编码的正交频分复用（OFDM））系统的干扰消除接收机在OFDM框架内组合时间干扰消除。 对接收信号的时域信道估计执行多径均衡和符号间干扰（ISI）消除。 来自多路径均衡的输出被转换到频域。 在将均衡信号从时域变换到频域之后，在来自多路径均衡的均衡信号的频域中执行信道间干扰（ICI）。
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公开(公告)号：US20110312275A1
公开(公告)日：2011-12-22
申请号：US12820958
申请日：2010-06-22
IPC分类号： H04B15/00
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。
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公开(公告)号：US20100310026A1
公开(公告)日：2010-12-09
申请号：US12478195
申请日：2009-06-04
IPC分类号： H04B1/10
CPC分类号： H04L25/03019 , H04L25/0228
摘要： A method for suppressing interference in a wireless communication comprises receiving a burst of symbols, filtering the burst of symbols using an interference suppression filter with a first plurality of weights, decoding the filtered burst of symbols to generate data corresponding to the burst of symbols, encoding the data to generate a re-encoded burst of symbols, calculating a second plurality of weights for the interference suppression filter based upon the re-encoded burst of symbols, filtering the re-encoded burst of symbols using the interference suppression filter with the second plurality of weights, and decoding the filtered re-encoded burst of symbols.
摘要翻译： 一种用于抑制无线通信中的干扰的方法包括：接收符号脉冲串，使用具有第一多个权重的干扰抑制滤波器对码元突发进行滤波，对经过滤波的码元突发进行解码以产生对应于符号突发的数据，编码 所述数据用于生成重新编码的符号突发，基于所述重新编码的符号突发，计算所述干扰抑制滤波器的第二多个权重，使用具有所述第二多个干扰抑制滤波器的所述重新编码的码元突发 并对经滤波的重新编码的符号突发进行解码。
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公开(公告)号：US20100046682A1
公开(公告)日：2010-02-25
申请号：US12193995
申请日：2008-08-19
IPC分类号： H04B1/10
CPC分类号： H04W56/00
摘要： A method for suppressing interference in a wireless communication is provided. The method comprises receiving a burst of symbols, generating a plurality of timing hypotheses for the burst of symbols, and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis, filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights, and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols based upon the selected one of the plurality of timing hypotheses.
摘要翻译： 提供了一种用于抑制无线通信中的干扰的方法。 该方法包括：接收符号脉冲串，产生符号脉冲串的多个定时假设，以及基于符号脉冲串的子集，针对每个时序假设计算干扰抑制滤波器的多个权重。 该方法还包括对于每个时序假设，使用具有对应的多个权重的干扰抑制滤波器对符号突发的子集进行滤波，并且选择与选择标准相对应的多个定时假设之一。 该方法还包括基于所选择的多个定时假设之一来均衡和解码经过滤波的符号突发。
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