专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080137763A1 CANDIDATE LIST GENERATION AND INTERFERENCE CANCELLATION FRAMEWORK FOR MIMO DETECTION 有权
标题翻译：候选列表生成和干扰消除框架用于MIMO检测
公开(公告)号：US20080137763A1
公开(公告)日：2008-06-12
申请号：US11930259
申请日：2007-10-31
申请人： Deric W. WATERS , Naftali SOMMER , Doron BURSHTEIN , Rafi DALLA TORRE , Oren PELES , Anuj BATRA , Srinath HOSUR , Daniel WAJCER
发明人： Deric W. WATERS , Naftali SOMMER , Doron BURSHTEIN , Rafi DALLA TORRE , Oren PELES , Anuj BATRA , Srinath HOSUR , Daniel WAJCER
IPC分类号： H04L27/28 , H04L27/00 , H04L27/06
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. 发明申请

US20080144746A1 PARAMETERIZED SPHERE DETECTOR AND METHODS OF USING THE SAME 有权
标题翻译：参数球形探测器及其使用方法
公开(公告)号：US20080144746A1
公开(公告)日：2008-06-19
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： H04L27/06 , H03D1/00
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. 发明申请

US20080137762A1 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：US20080137762A1
公开(公告)日：2008-06-12
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： 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. 发明申请

US20080187032A1 SYSTEMS AND METHODS FOR EFFICIENT CHANNEL CLASSIFICATION 有权
标题翻译：用于高效通道分类的系统和方法
公开(公告)号：US20080187032A1
公开(公告)日：2008-08-07
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。

5. 发明申请

US20080181324A1 SYSTEMS AND METHODS FOR SCALING TO EQUALIZE NOISE VARIANCE 审中-公开
标题翻译：用于平均噪声变化的系统和方法
公开(公告)号：US20080181324A1
公开(公告)日：2008-07-31
申请号：US12022927
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： H04L27/28
CPC分类号： H04L27/2647 , H04L1/206 , H04L25/03006 , H04L2025/03426 , H04L2025/03605
摘要： In order to enable multiple input-multiple output (MIMO) equalization, including as an example minimum mean-squared error (MMSE) MIMO equalization, to be implemented using a conventional QR decomposition, it is beneficial to force the noise variance of each of the channel outputs to be equalized. Embodiments scale the channel outputs in order to create an effective channel whose outputs have approximately the same noise variance. Embodiments comprise systems and methods for a channel outputs scaler to apply at least one scaling factor to each channel output of a channel outputs vector to thereby equalize the noise variance among the channel outputs.
摘要翻译：为了实现使用常规QR分解实现的包括作为最小均方误差（MMSE）MIMO均衡的多输入多输出（MIMO）均衡，有利的是强制每个的均衡噪声方差通道输出相等。实施例对信道输出进行缩放，以创建其输出具有大致相同噪声方差的有效信道。实施例包括用于信道输出缩放器的系统和方法，以将至少一个缩放因子应用于信道输出向量的每个信道输出，从而均衡信道输出之间的噪声方差。

6. 发明申请

US20080198943A1 SYSTEMS AND METHODS FOR LATTICE ENUMERATION-AIDED DETECTION 有权
标题翻译：系统和方法用于激光识别辅助检测
公开(公告)号：US20080198943A1
公开(公告)日：2008-08-21
申请号：US12032309
申请日：2008-02-15
申请人： David L. MILLINER , Anuj BATRA , Srinath HOSUR , Deric W. WATERS
发明人： David L. MILLINER , Anuj BATRA , Srinath HOSUR , Deric W. WATERS
IPC分类号： H04B7/02
CPC分类号： H04L25/03242 , H04L27/2647 , H04L2025/03426
摘要： Embodiments provide systems and methods for improved multiple-input, multiple-output (MIMO) detection comprising generating at least one list of candidate vectors by employing lattice enumeration which approximates hyperellipsoid detection search space and calculating a reliability of the candidate vectors. At least one advantage to embodiments is that improved detection occurs because detection can be performed in a search space defined by the eigenvectors (which define the general shape of an ellipsoid/hyperellipsoid, depending upon number of dimensions) and eigenvalues (which provide the appropriate scaling in each direction of the eigenvectors) of the effective channel.
摘要翻译：实施例提供了用于改进多输入多输出（MIMO）检测的系统和方法，包括通过采用接近超声检测搜索空间并计算候选向量的可靠性的点阵列表来生成候选向量的至少一个列表。对于实施例的至少一个优点是发生改进的检测，因为检测可以在由特征向量定义的搜索空间中执行（其定义为椭圆体的一般形状/取决于维数）和特征值（其提供适当的缩放在特征向量的每个方向上）有效信道。

7. 发明申请

US20080181323A1 NOISE VARIANCE ESTIMATION 有权
标题翻译：噪声变化估计
公开(公告)号：US20080181323A1
公开(公告)日：2008-07-31
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： H04L27/28 , H04B1/10
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。

8. 发明申请

US20080181321A1 SYSTEMS AND METHODS FOR LOW-COMPLEXITY MIMO DETECTION USING LEAF-NODE PREDICTION VIA LOOK-UP TABLES 有权
标题翻译：低复杂度MIMO检测系统和方法利用预报表进行叶节点预测
公开(公告)号：US20080181321A1
公开(公告)日：2008-07-31
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： H04L27/28
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. 发明申请

US20080187061A1 SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM 审中-公开
标题翻译：用于重构MIMO-OFDM系统中的转向矩阵的系统和方法
公开(公告)号：US20080187061A1
公开(公告)日：2008-08-07
申请号：US12024064
申请日：2008-01-31
申请人： Tarkesh PANDE , Srinath HOSUR , Anuj BATRA , Deric W. WATERS
发明人： Tarkesh PANDE , Srinath HOSUR , Anuj BATRA , Deric W. WATERS
IPC分类号： H04L27/28
CPC分类号： H04B7/043 , H04L25/0204 , H04L27/2626
摘要： Embodiments provide a system and method for reconstructing steering matrices in a MIMO-OFDM (multiple-input multiple-output orthogonal frequency division multiplexing) system by interpolating steering matrices in transmit beamforming. The reconstructed steering matrices provide a faithful representation to the actual steering matrices. Embodiments receive channel information for a subset of sub-carriers of a channel, interpolate the channel information for the subset of sub-carriers to obtain at least one Givens rotation angle for remaining sub-carriers of the channel which are not members of the subset, and reconstruct missing steering matrices from the interpolated angles.
摘要翻译：实施例提供了一种通过在发射波束形成中内插导引矩阵来重构MIMO-OFDM（多输入多输出正交频分复用）系统中的导向矩阵的系统和方法。重建的导向矩阵为实际的导向矩阵提供忠实的表示。实施例接收信道的子载波的子集的信道信息，内插用于子载波子集的信道信息，以获得不是子集的成员的信道的剩余子载波的至少一个Givens旋转角，并从内插角度重建失踪导向矩阵。

10. 发明申请

US20080137720A1 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：US20080137720A1
公开(公告)日：2008-06-12
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： H03D1/00 , H03H7/40 , H04L27/06
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式