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

US20090268833A1 METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A 2X2 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM 失效
标题翻译：用于预测2X2多输入多输出（MIMO）无线系统中最大比特率（ML）检测的信道质量指数（CQI）值的方法和系统
公开(公告)号：US20090268833A1
公开(公告)日：2009-10-29
申请号：US12430286
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L5/12 , H04L27/06
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/24 , H04B17/336 , H04B17/373 , H04L1/0009 , H04L1/0016 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L27/2601 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value.
摘要翻译：提出了一种用于在2x2 MIMO系统中预测ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以基于所计算的信道实现，通过将计算的信道实现反向映射到相应的CQI值来计算MIMO通信系统的CQI值。基于所计算的CQI值，可以选择编码率。编码率可以从查找表中选择，其中所计算的CQI值被用作查找表的索引。反向映射可以利用使用径向基函数网络来计算的函数。在系统的另一方面，可以为MIMO通信系统计算联合互信息值。可以基于香农互信息值和匹配滤波器互信息值来计算联合互信息值。

2. 发明授权

US08472543B2 Method and system for predicting channel quality index (CQI) values for maximum likelihood (ML) detection in a 2×2 multiple input multiple output (MIMO) wireless system 失效
标题翻译：用于在2×2多输入多输出（MIMO）无线系统中预测用于最大似然（ML）检测的信道质量指数（CQI）值的方法和系统
公开(公告)号：US08472543B2
公开(公告)日：2013-06-25
申请号：US12430286
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L23/02
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/24 , H04B17/336 , H04B17/373 , H04L1/0009 , H04L1/0016 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L27/2601 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value.
摘要翻译：提出了一种用于在2×2 MIMO系统中预测ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以基于所计算的信道实现，通过将计算的信道实现反向映射到相应的CQI值来计算MIMO通信系统的CQI值。基于所计算的CQI值，可以选择编码率。编码率可以从查找表中选择，其中所计算的CQI值被用作查找表的索引。反向映射可以利用使用径向基函数网络来计算的函数。在系统的另一方面，可以为MIMO通信系统计算联合互信息值。可以基于香农互信息值和匹配滤波器互信息值来计算联合互信息值。

3. 发明申请

US20090268834A1 METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A KXK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM 审中-公开
标题翻译：用于在KXK多输入多输出（MIMO）无线系统中用于最大似然（ML）检测的信道质量指数（CQI）值的预测方法和系统
公开(公告)号：US20090268834A1
公开(公告)日：2009-10-29
申请号：US12430294
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L5/12 , H04L27/06
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/373 , H04L1/0009 , H04L1/0025 , H04L1/0618 , H04L1/20 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a K×K MIMO system are presented. In one aspect of the system, a CQI value for a K×K MIMO communication system may be computed by decomposing the K×K MIMO system into a series of 2×2 MIMO systems. For each 2×2 MIMO system a CQI value may be computed by reverse mapping a PER computed for the 2×2 MIMO system and an SNR value for a SISO communication system. By summing CQI values among the series of 2×2 MIMO systems a CQI value for the K×K MIMO system may be computed. Based on the computed CQI value for the K×K MIMO system, a coding rate may be selected. The selected coding rate may be selected to maximize a computed information throughput rate at a MIMO receiver that utilizes ML detection.
摘要翻译：提出了一种用于预测KxK MIMO系统中ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以通过将KxK MIMO系统分解成一系列2x2MIMO系统来计算用于KxK MIMO通信系统的CQI值。对于每个2x2 MIMO系统，可以通过对针对2x2 MIMO系统计算的PER和SISO通信系统的SNR值进行反映射来计算CQI值。通过对2×2 MIMO系统的CQI值进行求和，可以计算K×K MIMO系统的CQI值。基于所计算的KxK MIMO系统的CQI值，可以选择编码率。可以选择所选择的编码率以使利用ML检测的MIMO接收机处的计算的信息吞吐率最大化。

4. 发明申请

US20090074114A1 Method and System for Approximate Maximum Likelihood (ML) Detection in a Multiple Input Multiple Output (MIMO) Receiver 审中-公开
标题翻译：在多输入多输出（MIMO）接收机中近似最大似然（ML）检测的方法和系统
公开(公告)号：US20090074114A1
公开(公告)日：2009-03-19
申请号：US12207721
申请日：2008-09-10
申请人： Eric Ojard , Sirikiat Ariyavisitakul
发明人： Eric Ojard , Sirikiat Ariyavisitakul
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04L27/2647 , H04L2025/03375 , H04L2025/03426
摘要： Aspects of a method and system for approximate maximum likelihood (ML) detection in a multiple input multiple output (MIMO) receiver may comprise computing soft decision values for bits that may be decoded from a received signal vector by utilizing approximate ML detection. The soft decision values may be computed for at least a portion bits carried within a received signal vector by decomposing a candidate constellation vector into segments, with each dimension representing a spatial stream signal. After decomposition, soft decision values for at least a portion of the bits may be computed by selecting values in a search dimension and computing values in a plurality of slice dimensions. Values within the search dimension may be determined by selecting constellation points within a constellation map for the search dimension. Values within each slice dimension may be computed for each selected constellation point.
摘要翻译：在多输入多输出（MIMO）接收机中用于近似最大似然（ML）检测的方法和系统的方面可以包括通过利用近似ML检测从可以从接收信号向量解码的比特计算软判决值。可以通过将候选星座矢量分解为段来计算在接收信号向量内承载的至少一部分比特的软判决值，其中每个维度表示空间流信号。在分解之后，可以通过选择搜索维度中的值和计算多个切片维度中的值来计算至少一部分比特的软判决值。可以通过在搜索维度的星座图中选择星座点来确定搜索维度内的值。可以为每个选定的星座点计算每个切片维数内的值。

5. 发明授权

US08233557B2 Method and system for subspace beamforming for near capacity multiple input multiple output (MIMO) performance 有权
标题翻译：用于近容量多输入多输出（MIMO）性能的子空间波束成形的方法和系统
公开(公告)号：US08233557B2
公开(公告)日：2012-07-31
申请号：US12246206
申请日：2008-10-06
申请人： Sirikiat Ariyavisitakul , Eric Ojard
发明人： Sirikiat Ariyavisitakul , Eric Ojard
IPC分类号： H04B7/02
CPC分类号： H04L25/03343 , H04B7/0434 , H04L25/0204
摘要： Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (θf) based on a channel estimate matrix (H). In instances when each rotation angle is computed based on a Euclidean distance criterion, each value θf may also be computed based on a computed Euclidean distance. Alternatively, in instances when each rotation angle is computed based on a bit error rate (BER) criterion, each value θf may also be computed based on a signal noise power level (N0). A plurality of spatial stream signals (xi) may be generated utilizing one or more constellation types. The constellation map for each constellation type may be rotated based on a corresponding value θf. A plurality of transmit chain signals (txi) may be generated based on the signals xi and transmitted via a communication medium characterized by matrix H.
摘要翻译：用于近容量MIMO性能的用于子空间波束成形的系统的方面可以包括基于信道估计矩阵（H）来计算一个或多个旋转角度值（＆amp; t; f）的MIMO发射机。在每个旋转角度基于欧几里德距离标准计算的情况下，也可以基于计算的欧氏距离来计算每个值＆amp; t; f。或者，在基于误码率（BER）准则计算每个旋转角度的情况下，也可以基于信号噪声功率电平（N0）来计算每个值＆amp; t。f。可以利用一个或多个星座类型来生成多个空间流信号（xi）。每个星座类型的星座图可以基于相应的值＆thetas旋转; f。可以基于信号xi生成多个发送链信号（txi），并通过由矩阵H表征的通信介质发送。

6. 发明申请

US20070258536A1 Method and system for reordered QRV-LST (layered space time) detection for efficient processing for multiple input multiple output (MIMO) communication systems 有权
标题翻译：用于多输入多输出（MIMO）通信系统的有效处理的重新排序的QRV-LST（分层时空）检测方法和系统
公开(公告)号：US20070258536A1
公开(公告)日：2007-11-08
申请号：US11417688
申请日：2006-05-04
申请人： Joonsuk Kim , Sirikiat Ariyavisitakul , Eric Ojard
发明人： Joonsuk Kim , Sirikiat Ariyavisitakul , Eric Ojard
IPC分类号： H04L1/02
CPC分类号： H04L1/0656 , H04B7/0426 , H04L1/0631 , H04L25/0206 , H04L27/2647 , H04L2025/03426
摘要： Aspects of a method and system for reordered QRV-LST (layered space time) detection for efficient processing for multiple input multiple output (MIMO) communication systems are presented. The method may include receiving an ordered plurality of signals wherein each of the ordered plurality of received signals comprises information contained in an ordered plurality of spatial streams. Each spatial stream may comprise one or more frequency carriers, or tones. Information, or data, contained in a corresponding one of the ordered plurality of spatial streams may be detected. The order in which the information is detected may be determined for each individual frequency carrier.
摘要翻译：提出了用于多输入多输出（MIMO）通信系统的有效处理的重新排序的QRV-LST（分层时空）检测方法和系统的方面。该方法可以包括接收有序多个信号，其中有序多个接收信号中的每一个包括包含在有序多个空间流中的信息。每个空间流可以包括一个或多个频率载波或音调。可以检测包含在有序多个空间流中的对应的一个空间流中的信息或数据。可以针对每个单独的频率载波确定检测信息的顺序。

7. 发明申请

US20090190691A1 Method and System for Subspace Beamforming for Near Capacity Multiple Input Multiple Output (MIMO) Performance 有权
标题翻译：用于近容量多输入多输出（MIMO）性能的子空间波束成形的方法和系统
公开(公告)号：US20090190691A1
公开(公告)日：2009-07-30
申请号：US12246206
申请日：2008-10-06
申请人： Sirikiat Ariyavisitakul , Eric Ojard
发明人： Sirikiat Ariyavisitakul , Eric Ojard
IPC分类号： H04L27/00
CPC分类号： H04L25/03343 , H04B7/0434 , H04L25/0204
摘要： Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (θf) based on a channel estimate matrix (H). In instances when each rotation angle is computed based on a Euclidean distance criterion, each value θf may also be computed based on a computed Euclidean distance. Alternatively, in instances when each rotation angle is computed based on a bit error rate (BER) criterion, each value θf may also be computed based on a signal noise power level (N0). A plurality of spatial stream signals (xi) may be generated utilizing one or more constellation types. The constellation map for each constellation type may be rotated based on a corresponding value θf. A plurality of transmit chain signals (txi) may be generated based on the signals xi and transmitted via a communication medium characterized by matrix H.
摘要翻译：用于近容量MIMO性能的子空间波束形成系统的方面可以包括基于信道估计矩阵（H）来计算一个或多个旋转角度值（thetaf）的MIMO发射机。在每个旋转角度基于欧氏距离标准计算的情况下，也可以基于计算的欧氏距离来计算每个值。或者，在基于误码率（BER）准则来计算每个旋转角度的情况下，也可以基于信号噪声功率电平（N0）来计算每个值。可以利用一个或多个星座类型来生成多个空间流信号（xi）。每个星座类型的星座图可以基于相应的值totaf来旋转。可以基于信号xi生成多个发送链信号（txi），并通过由矩阵H表征的通信介质发送。

8. 发明授权

US08442142B2 Method and system for beamforming signal transmission under a per-antenna power constraint 有权
标题翻译：在每个天线功率约束下波束成形信号传输的方法和系统
公开(公告)号：US08442142B2
公开(公告)日：2013-05-14
申请号：US12761567
申请日：2010-04-16
申请人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
发明人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
IPC分类号： H01Q3/00 , G01S1/00
CPC分类号： H01Q25/00
摘要： A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna.
摘要翻译：提出了一种在每个天线功率约束下波束成形信号传输的方法和系统。在一个方面，多输入多输出（MIMO）发射站可以为多个发射链信号中的每一个计算每天线功率增益因子。发射链信号可以在MIMO发射台处由多个发射天线同时发射。多个发射链信号可以对应于通过在多个时空信号上执行空间映射而生成的波束形成信号。可以基于每天线功率约束来计算多个功率增益因子。或者，可以基于联合每天线功率和总功率约束来计算多个功率增益因子。每个发射链信号可以基于相应的天线增益因子被放大或衰减。放大或衰减的信号然后由相应的发射天线发射。

9. 发明授权

US08144794B2 Efficient optimal ML detector 有权
标题翻译：有效的最优ML检测器
公开(公告)号：US08144794B2
公开(公告)日：2012-03-27
申请号：US12760665
申请日：2010-04-15
申请人： Eric Ojard
发明人： Eric Ojard
IPC分类号： H04L7/04
CPC分类号： H04B7/0854 , H04L1/0048 , H04L25/03184 , H04L25/03331
摘要： An efficient optimal maximum-likelihood output detector reducing the complexity of demodulation/decoding computations in multiple-input multiple-output communication systems. A plurality of received signals may be combined into a plurality of combined received signals by multiplication of a matrix representing the plurality of received signals with another matrix that meets certain conditions. The plurality of combined received signals may then allow for slicing operations as well as calculation of distance metrics with significantly reduced complexity.
摘要翻译：一种有效的最佳最大似然输出检测器，可降低多输入多输出通信系统中解调/解码计算的复杂度。多个接收信号可以通过将表示多个接收信号的矩阵与满足某些条件的另一个矩阵相乘来组合成多个组合的接收信号。然后，多个组合的接收信号可以允许切片操作以及具有显着降低的复杂度的距离度量的计算。

10. 发明申请

US20110176633A1 METHOD AND SYSTEM FOR ORTHOGONALIZED BEAMFORMING IN MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于多用户多输入多输出（MU-MIMO）通信系统中正交波束成像的方法和系统
公开(公告)号：US20110176633A1
公开(公告)日：2011-07-21
申请号：US12834411
申请日：2010-07-12
申请人： Eric Ojard , Sirikiat Lek Ariyavisitakul
发明人： Eric Ojard , Sirikiat Lek Ariyavisitakul
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0617
摘要： A method and system for orthogonalized beamforming in multiple user multiple input multiple output (MU-MIMO) communication systems are presented. Aspects of the method and system include an iterative method for computing a plurality of beamforming matrices in a MU-MIMO system. A transmitting station, such as an access point (AP) for example, may use computed channel estimates, and/or singular vector matrices, to compute orthogonal beamforming matrices. The computed orthogonal beamforming matrices may be used to generate a plurality of signals, which may be concurrently transmitted to the plurality of user devices.
摘要翻译：提出了一种用于多用户多输入多输出（MU-MIMO）通信系统中正交波束成形的方法和系统。该方法和系统的方面包括用于在MU-MIMO系统中计算多个波束形成矩阵的迭代方法。诸如接入点（AP）的发射站可以使用计算的信道估计和/或奇异向量矩阵来计算正交波束形成矩阵。所计算的正交波束形成矩阵可以用于生成可以同时发送到多个用户设备的多个信号。

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