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1. 发明授权

US07957484B2 Candidate list generation and interference cancellation framework for MIMO detection 有权
标题翻译：用于MIMO检测的候选列表生成和干扰消除框架
公开(公告)号：US07957484B2
公开(公告)日：2011-06-07
申请号：US11930259
申请日：2007-10-31
申请人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur , Doron Burshtein , Rafi Dalla Torre , Oren Peles , Daniel Wajcer
发明人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur , Doron Burshtein , Rafi Dalla Torre , Oren Peles , Daniel Wajcer
IPC分类号： H04L27/00
CPC分类号： H04L25/03006 , H04L2025/03426
摘要： A method and system for performing Multiple-Input Multiple-Output (“MIMO”) detection that reduces complexity by decomposing MIMO detection problem into two less complex problems, Candidate List generation and Interference Cancellation (“CLIC”). Embodiments of the CLIC framework parse an N element channel output into a first set containing S elements and a second set containing N−S elements. A first list of candidate vectors is generated from the first set of elements. A set of interference cancelled elements is generated by using the first list of candidate vectors to cancel interference from the second set of elements. A second list of candidate vectors is generated from the set of interference cancelled elements. A minimum cost is computed for each bit of the candidate vectors and from the costs a log-likelihood ratio is computed.
摘要翻译：一种用于执行多输入多输出（“MIMO”）检测的方法和系统，其通过将MIMO检测问题分解成两个较不复杂的问题，候选列表生成和干扰消除（“CLIC”）来降低复杂度。 CLIC框架的实施例将N元素信道输出解析为包含S个元素的第一集合和包含N-S个元素的第二集合。从第一组元素生成候选向量的第一列表。通过使用候选向量的第一列表来消除来自第二组元素的干扰来生成一组干扰消除元素。从干扰消除元素的集合生成候选向量的第二列表。针对候选向量的每一位计算最小成本，并从成本计算对数似然比。

2. 发明授权

US07961826B2 Parameterized sphere detector and methods of using the same 有权
标题翻译：参数化球面探测器及其使用方法
公开(公告)号：US07961826B2
公开(公告)日：2011-06-14
申请号：US11928863
申请日：2007-10-30
申请人： Deric W. Waters , Oren Peles , Anuj Batra , Srinath Hosur , Doron Burshtein
发明人： Deric W. Waters , Oren Peles , Anuj Batra , Srinath Hosur , Doron Burshtein
IPC分类号： H04B7/10 , H04L1/02
CPC分类号： H04L25/03242 , H04L2025/03414 , H04L2025/03426
摘要： A Multiple-input Multiple-Output (MIMO) receiver is provided. The MIMO receiver comprises a parameterized sphere detector having two search modes. During a first search mode, the parameterized sphere detector enumerates a number of best candidate vectors up to a fixed parameter value. During a second search mode, the parameterized sphere detector enumerates additional candidate vectors using a greedy search until a predetermined number of candidate vectors have been enumerated.
摘要翻译：提供多输入多输出（MIMO）接收机。 MIMO接收机包括具有两个搜索模式的参数化球体检测器。在第一搜索模式期间，参数化球体检测器枚举多达一个固定参数值的最佳候选向量。在第二搜索模式期间，参数化球体检测器使用贪婪搜索枚举附加候选向量，直到已经列举了预定数量的候选向量。

3. 发明授权

US08040959B2 Dynamic resource allocation to improve MIMO detection performance 有权
标题翻译：动态资源分配，以提高MIMO检测性能
公开(公告)号：US08040959B2
公开(公告)日：2011-10-18
申请号：US11926966
申请日：2007-10-29
申请人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur
发明人： Deric W. Waters , Naftali Sommer , Anuj Batra , Srinath Hosur
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L25/03006 , H04L2025/03414 , H04L2025/03426
摘要： A method and apparatus for detecting symbols in a Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (“MIMO-OFDM”) system. A MIMO-OFDM receiver includes a first detector that estimates a symbol of a first MIMO-OFDM sub-carrier and a second detector that estimates a symbol of a second MIMO-OFDM sub-carrier. The second detector differs in complexity from the first detector. A detector control block is coupled to the detectors. The detector control block assigns the first detector to process the first MIMO-OFDM sub-carrier and assigns the second detector to process the second MIMO-OFDM sub-carrier. The detector control block computes a list metric for a sub-carrier. Based on the list metric the detector control block assigns a candidate symbol list length to the detector processing the sub-carrier. Alternately, the detector control block assigns one of a variety of detector types to a sub-carrier based on the sub-carrier list metric.
摘要翻译：一种用于在多输入多输出正交频分复用（“MIMO-OFDM”）系统中检测符号的方法和装置。 MIMO-OFDM接收机包括估计第一MIMO-OFDM子载波的符号的第一检测器和估计第二MIMO-OFDM子载波的符号的第二检测器。第二检测器的复杂性与第一检测器不同。检测器控制块耦合到检测器。检测器控制块分配第一检测器来处理第一MIMO-OFDM子载波，并且分配第二检测器来处理第二MIMO-OFDM子载波。检测器控制块计算子载波的列表度量。基于列表度量，检测器控制块将候选符号列表长度分配给处理子载波的检测器。或者，检测器控制块基于子载波列表度量将各种检测器类型中的一种分配给子载波。

4. 发明授权

US08054914B2 Noise variance estimation 有权
标题翻译：噪声方差估计
公开(公告)号：US08054914B2
公开(公告)日：2011-11-08
申请号：US12022461
申请日：2008-01-30
申请人： Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H04L27/2647 , H04L1/206
摘要： A method and system for estimating noise variance. A method for noise variance estimation comprises receiving a first multi-sample symbol and receiving a second multi-sample symbol. The first multi-sample symbol is subtracted from the second multi-sample symbol to produce a set of noise samples. The set of noise samples is used to produce a noise variance estimate. The noise variance estimate is applied in various tasks (e.g. channel estimation, log-likelihood ratio computation, and/or minimum mean squared error equalization) to process data provided to a user.
摘要翻译：一种用于估计噪声方差的方法和系统。一种用于噪声方差估计的方法包括接收第一多样本符号并接收第二多样本符号。从第二多样本符号中减去第一多样本符号以产生一组噪声样本。噪声样本集用于产生噪声方差估计。在各种任务（例如信道估计，对数似然比计算和/或最小均方误差均衡）中应用噪声方差估计以处理提供给用户的数据。

5. 发明申请

US20100180173A1 Hybrid-ARQ (HARQ) with Scrambler and Diversity 有权
标题翻译：混合ARQ（HARQ）与扰码器和多样性
公开(公告)号：US20100180173A1
公开(公告)日：2010-07-15
申请号：US12686929
申请日：2010-01-13
申请人： Anuj Batra , Deric W. Waters , Srinath Hosur
发明人： Anuj Batra , Deric W. Waters , Srinath Hosur
IPC分类号： H04L1/18 , H03M13/05 , G06F11/10 , G06F11/14
CPC分类号： H04L1/1812 , H04L1/188 , H04L1/1893
摘要： Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.
摘要翻译：本发明的实施例提供了一种混合自动重传请求（HARQ）处理的系统和方法。维特比解码器耦合到并跟随解扰器。在信号被解除加扰之后，如果需要与另一个数据包重新组合，则可将其存储在存储器中。这意味着每个发送的比特的对数似然比LLRs使用有限数量的比特（例如，在4比特和12比特之间）存储在存储器中。如果当前处理的分组包含重发信息，则可以将包含相同信息的先前分组存储的去加扰输出加载并与当前分组组合。

6. 发明授权

US08699554B2 Scaling to reduce wireless signal detection complexity 有权
标题翻译：缩小无线信号检测复杂度
公开(公告)号：US08699554B2
公开(公告)日：2014-04-15
申请号：US11928050
申请日：2007-10-30
申请人： Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H03H7/30 , H03K5/159
CPC分类号： H04L25/03006 , H04L2025/03426 , H04L2025/03605
摘要： In at least some embodiments, a receiver for a wireless communication system is provided. The receiver includes an equalizer that provides an equalized channel matrix. The receiver also includes scaling logic coupled to the equalizer, the scaling logic selectively scales coefficients of the equalized channel matrix. The receiver also includes a decoder coupled to the scaling logic. The decoder decodes a signal based on the equalized channel matrix with scaled coefficients.
摘要翻译：在至少一些实施例中，提供了一种用于无线通信系统的接收机。接收机包括提供均衡信道矩阵的均衡器。接收机还包括耦合到均衡器的缩放逻辑，缩放逻辑选择性地缩放均衡信道矩阵的系数。接收机还包括耦合到缩放逻辑的解码器。解码器基于具有缩放系数的均衡信道矩阵来解码信号。

7. 发明授权

US08392781B2 Hybrid-ARQ (HARQ) with scrambler 有权
标题翻译：混合ARQ（HARQ）与扰频器
公开(公告)号：US08392781B2
公开(公告)日：2013-03-05
申请号：US12686929
申请日：2010-01-13
申请人： Anuj Batra , Deric W. Waters , Srinath Hosur
发明人： Anuj Batra , Deric W. Waters , Srinath Hosur
IPC分类号： G08C25/02 , H03M13/00
CPC分类号： H04L1/1812 , H04L1/188 , H04L1/1893
摘要： Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.
摘要翻译：本发明的实施例提供了一种混合自动重传请求（HARQ）处理的系统和方法。维特比解码器耦合到并跟随解扰器。在信号被解除加扰之后，如果需要与另一个数据包重新组合，则可将其存储在存储器中。这意味着每个发送的比特的对数似然比LLRs使用有限数量的比特（例如，在4比特和12比特之间）存储在存储器中。如果当前处理的分组包含重发信息，则可以将包含相同信息的先前分组存储的去加扰输出加载并与当前分组组合。

8. 发明授权

US08306139B2 Systems and methods for low-complexity MIMO detection using leaf-node prediction via look-up tables 有权
标题翻译：用于通过查找表使用叶节点预测的低复杂度MIMO检测的系统和方法
公开(公告)号：US08306139B2
公开(公告)日：2012-11-06
申请号：US12016921
申请日：2008-01-18
申请人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H04B7/02
CPC分类号： H04L27/2601 , H04L25/0202
摘要： Systems and methods for providing multiple-input multiple-output (MIMO) detection, comprising a leaf node predictor for receiving a processed communications stream, computing at least one channel metric corresponding to the communications stream for a given channel realization, and generating at least one parameter corresponding to at least one predicted best leaf node candidate for the given channel realization. A MIMO engine receives the at least one parameter and enumerates at least one list of candidate vectors corresponding to the leaf nodes specified by the generated at least one parameter. Some embodiments simulate a MIMO detector over many channel realizations, track channel metric and parameter values used for each channel realization resulting from such simulating, and store, in a look-up table, best values of the tracked values used for a particular channel metric.
摘要翻译：用于提供多输入多输出（MIMO）检测的系统和方法，包括用于接收经处理的通信流的叶节点预测器，为给定的信道实现计算对应于通信流的至少一个信道度量，以及生成至少一个参数对应于给定信道实现的至少一个预测的最佳叶节点候选。 MIMO引擎接收所述至少一个参数，并且列举与由所生成的至少一个参数指定的叶节点相对应的候选向量的至少一个列表。一些实施例通过许多信道实现来模拟MIMO检测器，跟踪信道度量和用于每个信道实现的参数值，由这样的模拟和存储在查找表中，用于特定信道度量的跟踪值的最佳值。

9. 发明授权

US08243843B2 Systems and methods for low-complexity MIMO detection using leaf-node prediction via look-up tables 有权
标题翻译：用于通过查找表使用叶节点预测的低复杂度MIMO检测的系统和方法
公开(公告)号：US08243843B2
公开(公告)日：2012-08-14
申请号：US13079944
申请日：2011-04-05
申请人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
发明人： David L. Milliner , Deric W. Waters , Anuj Batra , Srinath Hosur
IPC分类号： H04B7/02
CPC分类号： H04L27/2601 , H04L25/0202
摘要： A method for building a look-up table for a receiver in a multiple-input multiple-output (MIMO) detection system simulates a MIMO detector over many channel realizations, tracks channel metric and parameter values used for each channel realization resulting from such simulating, and stores, in a look-up table, best values of the tracked values used for a particular channel metric.
摘要翻译：用于构建多输入多输出（MIMO）检测系统中的接收机的查找表的方法通过许多信道实现来模拟MIMO检测器，跟踪由这样的模拟产生的每个信道实现所使用的信道度量和参数值，并且在查找表中存储用于特定信道度量的被跟踪值的最佳值。

10. 发明授权

US08023577B2 Systems and methods for efficient channel classification 有权
标题翻译：高效渠道分类的系统和方法
公开(公告)号：US08023577B2
公开(公告)日：2011-09-20
申请号：US12024029
申请日：2008-01-31
申请人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
发明人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
IPC分类号： H04B17/00 , H04B3/46 , H04Q1/20
CPC分类号： H04L25/0204 , H04B7/0417 , H04B7/066 , H04L2025/03426
摘要： Embodiments provide a system and method for efficiently classifying different channel types in an orthogonal frequency division multiplexing (OFDM) system. Embodiments quantify the frequency selectivity in a channel by measuring the variation in a particular channel statistic across sub-carriers in an OFDM system, involve minimal complexity in implementation, and can be used in a variety of scenarios. One embodiment is a method for classifying channels in an OFDM system, comprising measuring variation of at least one channel statistic across sub-carriers, quantifying the variation to determine a measurement value, and applying the measurement value to at least one threshold to classify the channel.
摘要翻译：实施例提供了一种用于在正交频分复用（OFDM）系统中有效地分类不同信道类型的系统和方法。实施例通过测量OFDM系统中跨子载波的特定信道统计量的变化来量化信道中的频率选择性，涉及实现中的最小复杂度，并且可以用于各种情况。一个实施例是一种用于对OFDM系统中的信道进行分类的方法，包括测量跨越子载波的至少一个信道统计量的变化，量化变化以确定测量值，以及将测量值应用于至少一个阈值以对信道进行分类。

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