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1. 发明申请

US20130039436A1 TECHNIQUES FOR DETECTION OF SIGNALS IN MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATION SYSTEMS 失效
标题翻译：用于检测多输入多输出通信系统中的信号的技术
公开(公告)号：US20130039436A1
公开(公告)日：2013-02-14
申请号：US13545010
申请日：2012-07-10
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Tanumay Datta
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Tanumay Datta
IPC分类号： H04B7/02 , H04L27/34
CPC分类号： H04B7/0413 , H04L25/0204 , H04L25/0246 , H04L25/03292 , H04L25/03331 , H04L27/38
摘要： A receiver of a multiple-input multiple-output (MIMO) system performs QR decomposition of the channel matrix to enable detection of a transmitted vector in a layered manner. In each layer, a sub-vector of the transmitted vector is estimated. A reactive tabu search is performed if an estimated symbol differs from a nearest symbol in the alphabet by a predetermined value. The receiver may order the entries of the channel matrix prior to QR decomposition to enable estimation in an optimum order. In another embodiment, a receiver performs multiple reactive tabu searches to estimate a transmitted vector. The receiver employs a fixed threshold or a variable threshold for a cost function used in the multiple reactive tabu searches depending on whether the MIMO system is under-determined or not. The techniques enable low bit-error rate (BER) performance in MIMO systems with large number of antennas and when higher-order modulation techniques are used.
摘要翻译：多输入多输出（MIMO）系统的接收机执行信道矩阵的QR分解，以便以分层方式检测传输的矢量。在每个层中，估计传输矢量的子向量。如果估计的符号与字母表中最近的符号不同，则执行反应性禁忌搜索预定值。接收机可以在QR分解之前对信道矩阵的条目进行排序，以便以最佳顺序进行估计。在另一个实施例中，接收机执行多个反应禁忌搜索以估计传输的向量。接收机对于多个反应禁忌搜索中使用的成本函数采用固定阈值或可变阈值，这取决于MIMO系统是否未被确定。这些技术使得具有大量天线的MIMO系统中的低比特误码率（BER）性能和使用高阶调制技术时都能够实现。

2. 发明授权

US08634490B2 Techniques for detection of signals in multiple-input multiple-output communication systems 失效
标题翻译：用于在多输入多输出通信系统中检测信号的技术
公开(公告)号：US08634490B2
公开(公告)日：2014-01-21
申请号：US13545010
申请日：2012-07-10
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Tanumay Datta
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Tanumay Datta
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0413 , H04L25/0204 , H04L25/0246 , H04L25/03292 , H04L25/03331 , H04L27/38
摘要： A receiver of a multiple-input multiple-output (MIMO) system performs QR decomposition of the channel matrix to enable detection of a transmitted vector in a layered manner. In each layer, a sub-vector of the transmitted vector is estimated. A reactive tabu search is performed if an estimated symbol differs from a nearest symbol in the alphabet by a predetermined value. The receiver may order the entries of the channel matrix prior to QR decomposition to enable estimation in an optimum order. In another embodiment, a receiver performs multiple reactive tabu searches to estimate a transmitted vector. The receiver employs a fixed threshold or a variable threshold for a cost function used in the multiple reactive tabu searches depending on whether the MIMO system is under-determined or not. The techniques enable low bit-error rate (BER) performance in MIMO systems with large number of antennas and when higher-order modulation techniques are used.
摘要翻译：多输入多输出（MIMO）系统的接收机执行信道矩阵的QR分解，以便以分层方式检测传输的矢量。在每个层中，估计传输矢量的子向量。如果估计的符号与字母表中最近的符号不同，则执行反应性禁忌搜索预定值。接收机可以在QR分解之前对信道矩阵的条目进行排序，以便以最佳顺序进行估计。在另一个实施例中，接收机执行多个反应禁忌搜索以估计传输的向量。接收机对于多个反应禁忌搜索中使用的成本函数采用固定阈值或可变阈值，这取决于MIMO系统是否未被确定。这些技术使得具有大量天线的MIMO系统中的低比特误码率（BER）性能和使用高阶调制技术时都能够实现。

3. 发明申请

US20140133591A1 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TRANSMITTED SIGNAL VECTOR ESTIMATION EMPLOYING MONTE CARLO SAMPLING TECHNIQUES 审中-公开
标题翻译：使用MONTE CARLO采样技术的多输入多输出（MIMO）传输信号矢量估计
公开(公告)号：US20140133591A1
公开(公告)日：2014-05-15
申请号：US14159461
申请日：2014-01-21
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
IPC分类号： H04B7/04
CPC分类号： H04B7/0413 , H04L25/03203 , H04L25/03891
摘要： A method of determining a transmitted vector (x) in a MIMO receiver includes the steps of receiving a received vector (y) representative of the transmitted vector (x), generating a first random number and forming, in a first iteration, a first symbol of a first candidate vector, the candidate vector representing a potential solution vector. The step of forming is based on a first approach if the first random number is greater than a first predetermined value (q), but is based on a second approach if the random number is less than or equal to the first predetermined value (q). The first approach randomly selects the first symbol from a uniform distribution of symbols in the transmission alphabet. The second approach selects the first symbol based on Gibbs sampling. The method represents a randomized Markov Chain Monte Carlo (RMCMC) sampling technique.
摘要翻译：一种在MIMO接收机中确定发射矢量（x）的方法包括以下步骤：接收表示所发射矢量（x）的接收矢量（y），产生第一随机数，并在第一迭代中形成第一符号第一候选向量，候选向量表示潜在的解向量。如果第一随机数大于第一预定值（q），则形成步骤基于第一方法，但是如果随机数小于或等于第一预定值（q），则基于第二方法，。第一种方法是从发送字母表中的符号的均匀分布中随机选择第一个符号。第二种方法选择基于吉布斯抽样的第一个符号。该方法代表随机的马尔可夫链蒙特卡罗（RMCMC）采样技术。

4. 发明授权

US08675780B2 Multiple input multiple output (MIMO) transmitted signal vector estimation employing Monte Carlo sampling techniques 失效
标题翻译：采用蒙特卡罗抽样技术的多输入多输出（MIMO）传输信号向量估计
公开(公告)号：US08675780B2
公开(公告)日：2014-03-18
申请号：US13472519
申请日：2012-05-16
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
IPC分类号： H04L27/06 , H04L27/00
CPC分类号： H04B7/0413 , H04L25/03203 , H04L25/03891
摘要： A method of determining a transmitted vector (x) in a MIMO receiver includes the steps of receiving a received vector (y) representative of the transmitted vector (x), generating a first random number and forming, in a first iteration, a first symbol of a first candidate vector, the candidate vector representing a potential solution vector. The step of forming is based on a first approach if the first random number is greater than a first predetermined value (q), but is based on a second approach if the random number is less than or equal to the first predetermined value (q). The first approach randomly selects the first symbol from a uniform distribution of symbols in the transmission alphabet. The second approach selects the first symbol based on Gibbs sampling. The method represents a randomized Markov Chain Monte Carlo (RMCMC) sampling technique.
摘要翻译：一种在MIMO接收机中确定发射矢量（x）的方法包括以下步骤：接收表示所发射矢量（x）的接收矢量（y），产生第一随机数，并在第一迭代中形成第一符号第一候选向量，候选向量表示潜在的解向量。如果第一随机数大于第一预定值（q），则形成步骤基于第一方法，但是如果随机数小于或等于第一预定值（q），则基于第二方法，。第一种方法是从发送字母表中的符号的均匀分布中随机选择第一个符号。第二种方法选择基于吉布斯抽样的第一个符号。该方法代表随机的马尔可夫链蒙特卡罗（RMCMC）采样技术。

5. 发明申请

US20120307924A1 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TRANSMITTED SIGNAL VECTOR ESTIMATION EMPLOYING MONTE CARLO SAMPLING TECHNIQUES 失效
标题翻译：使用MONTE CARLO采样技术的多输入多输出（MIMO）传输信号矢量估计
公开(公告)号：US20120307924A1
公开(公告)日：2012-12-06
申请号：US13472519
申请日：2012-05-16
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Tanumay Datta , Ashok Kumar. N
IPC分类号： H04L27/28
CPC分类号： H04B7/0413 , H04L25/03203 , H04L25/03891
摘要： A method of determining a transmitted vector (x) in a MIMO receiver includes the steps of receiving a received vector (y) representative of the transmitted vector (x), generating a first random number and forming, in a first iteration, a first symbol of a first candidate vector, the candidate vector representing a potential solution vector. The step of forming is based on a first approach if the first random number is greater than a first predetermined value (q), but is based on a second approach if the random number is less than or equal to the first predetermined value (q). The first approach randomly selects the first symbol from a uniform distribution of symbols in the transmission alphabet. The second approach selects the first symbol based on Gibbs sampling. The method represents a randomized Markov Chain Monte Carlo (RMCMC) sampling technique.
摘要翻译：一种在MIMO接收机中确定发射矢量（x）的方法包括以下步骤：接收表示所发射矢量（x）的接收矢量（y），产生第一随机数，并在第一迭代中形成第一符号第一候选向量，候选向量表示潜在的解向量。如果第一随机数大于第一预定值（q），则形成步骤基于第一方法，但是如果随机数小于或等于第一预定值（q），则基于第二方法，。第一种方法是从发送字母表中的符号的均匀分布中随机选择第一个符号。第二种方法选择基于吉布斯抽样的第一个符号。该方法代表随机的马尔可夫链蒙特卡罗（RMCMC）采样技术。

6. 发明授权

US08503544B2 Techniques for decoding transmitted signals using reactive taboo searches (RTS) 有权
标题翻译：使用反应式禁忌搜索（RTS）对发送信号进行解码的技术
公开(公告)号：US08503544B2
公开(公告)日：2013-08-06
申请号：US12771730
申请日：2010-04-30
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Saif Khan Mohammed
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi Nagaraja , Saif Khan Mohammed
IPC分类号： H04L27/00
CPC分类号： H04B7/0413 , H04L1/0631 , H04L25/0204 , H04L25/03178 , H04L25/03331
摘要： Techniques for enabling an estimate of a transmitted signal vector, given a received signal vector and a channel matrix to be computed, are provided. An initial solution signal vector for the estimate is calculated, and based on the initial estimate, a pool of possible solutions is generated. Methods described herein may be iterative in nature, and may cycle through possible estimates of the transmitted signal vector so as to continually improve the estimates and the pool of possible estimates. The methods may terminate once stopping criteria are reached. In some example methods, solutions may be marked at taboo and a taboo period can be established that indicates a number of subsequent iterations for which the current solution signal vector cannot be considered.
摘要翻译：提供给定接收信号向量和要计算的信道矩阵的用于使发送信号向量的估计的技术。计算用于估计的初始解信号向量，并且基于初始估计，生成可能解的池。本文描述的方法本质上可以是迭代的，并且可以循环通过传输的信号向量的可能估计，以便不断改进估计和可能估计的汇总。一旦达到停止标准，方法可能会终止。在一些示例性方法中，可以在禁忌中标记解，并且可以建立禁忌期，其指示不能考虑当前解信号向量的多个后续迭代。

7. 发明授权

US08605808B2 Method to detect data transmitted by multiple antennas 失效
标题翻译：检测由多个天线发射的数据的方法
公开(公告)号：US08605808B2
公开(公告)日：2013-12-10
申请号：US12672273
申请日：2009-02-25
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Saif Khan Mohammed
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Saif Khan Mohammed
IPC分类号： H04B7/02
CPC分类号： H04B7/0854 , H04B7/0669 , H04B7/0891 , H04L1/0643
摘要： Disclosed is a method and system to detect data transmitted by multiple transmit antennas. The method comprises selecting a starting data block that is either a random data block or an output data block from known detectors. Also, the method comprises changing each symbol of the starting data block one symbol at a time to identify a data block which has minimum euclidean distance from the starting data block as detected data block. Next, changing two symbols of the detected data block at a time to identify a data block which has minimum euclidean distance from the starting data block as second data block and assigning the second data block as the starting data block. Repeating the above steps, if the minimum euclidean distance of second data block is better than that of the detected data block, and determining the detected data block as the data transmitted.
摘要翻译：公开了一种检测由多个发射天线发射的数据的方法和系统。该方法包括从已知检测器中选择作为随机数据块或输出数据块的起始数据块。此外，该方法包括一次改变一个符号的起始数据块的每个符号，以识别作为检测数据块的起始数据块具有最小欧几里德距离的数据块。接下来，一次改变检测数据块的两个符号，以识别从起始数据块具有最小欧几里得距离的数据块作为第二数据块，并将第二数据块分配为起始数据块。重复上述步骤，如果第二数据块的最小欧几里德距离比检测到的数据块的最小欧几里德距离更好，并且将检测到的数据块确定为所发送的数据。

8. 发明授权

US08116411B2 Method to detect data transmitted from multiple antennas and system thereof 失效
标题翻译：检测从多个天线发射的数据及其系统的方法
公开(公告)号：US08116411B2
公开(公告)日：2012-02-14
申请号：US11842963
申请日：2007-08-22
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Kalepalli Vishnu Vardhan , Saif Khan Mohammed
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Kalepalli Vishnu Vardhan , Saif Khan Mohammed
IPC分类号： H04L27/06
CPC分类号： H04L1/0631 , H04L1/0643 , H04L1/0656 , H04L2025/03414 , H04L2025/03426
摘要： A method to detect data transmitted from multiple antennas, said method comprising steps of: selecting a starting data block and calling it as previous data block; defining a set of indices of bits to be checked for possible flip in the previous data block as a check candidate set; applying update rule to obtain updated data block using the previous data block and the check candidate set, wherein the update is made in such a manner that change in likelihood is positive; checking if the updated data block and several consecutive previous data blocks are the same; if yes, declare the updated data block as the detected data block; if no, make updated data block as previous data block and repeat updation of data block.
摘要翻译：一种检测从多个天线发送的数据的方法，所述方法包括以下步骤：选择起始数据块并将其称为先前的数据块; 定义一组待检查的位的索引索引，作为检查候选集合在先前数据块中的可能翻转; 应用更新规则以使用所述先前数据块和所述检查候选集获得更新的数据块，其中所述更新以可能性变化为正的方式进行; 检查更新的数据块和几个连续的先前数据块是否相同; 如果是，则将更新的数据块声明为检测到的数据块; 如果没有，则将更新的数据块作为先前的数据块并重新更新数据块。

9. 发明申请

US20110268203A1 Techniques for Decoding Transmitted Signals Using Reactive Taboo Searches (RTS) 有权
标题翻译：使用反应禁忌搜索（RTS）解码传输信号的技术
公开(公告)号：US20110268203A1
公开(公告)日：2011-11-03
申请号：US12771730
申请日：2010-04-30
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi N. , Saif Khan Mohammed
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Srinidhi N. , Saif Khan Mohammed
IPC分类号： H04K1/10
CPC分类号： H04B7/0413 , H04L1/0631 , H04L25/0204 , H04L25/03178 , H04L25/03331
摘要： Techniques for enabling an estimate of a transmitted signal vector, given a received signal vector and a channel matrix to be computed, are provided. An initial solution signal vector for the estimate is calculated, and based on the initial estimate, a pool of possible solutions is generated. Methods described herein may be iterative in nature, and may cycle through possible estimates of the transmitted signal vector so as to continually improve the estimates and the pool of possible estimates. The methods may terminate once stopping criteria are reached. In some example methods, solutions may be marked at taboo and a taboo period can be established that indicates a number of subsequent iterations for which the current solution signal vector cannot be considered.
摘要翻译：提供给定接收信号向量和要计算的信道矩阵的用于使发送信号向量的估计的技术。计算用于估计的初始解信号向量，并且基于初始估计，生成可能解的池。本文描述的方法本质上可以是迭代的，并且可以循环通过传输的信号向量的可能估计，以便不断改进估计和可能估计的汇总。一旦达到停止标准，方法可能会终止。在一些示例性方法中，可以在禁忌中标记解，并且可以建立禁忌期，其指示不能考虑当前解信号向量的多个后续迭代。

10. 发明授权

US08320432B1 Device and method for precoding vectors in a communication system 有权
标题翻译：通信系统中预编码矢量的装置和方法
公开(公告)号：US08320432B1
公开(公告)日：2012-11-27
申请号：US12430635
申请日：2009-04-27
申请人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Saif Khan Mohammed
发明人： Ananthanarayanan Chockalingam , Balaji Sundar Rajan , Saif Khan Mohammed
IPC分类号： H04B1/38
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0626 , Y02D70/00 , Y02D70/142 , Y02D70/146 , Y02D70/444
摘要： A device and method for precoding vectors in a communication system is provided. A transmitter may precode a data vector using information regarding a communication channel prior to transmitting the data vector. The transmitter may precode the data vector in a manner that reduces an energy value of a resulting transmit data vector so as to minimize interference in a received signal at a receiver. The transmitter may perturb entries of the data vector one-by-one in an iterative fashion until a minimum in an energy value of the transmit data vector is obtained.
摘要翻译：提供了一种用于在通信系统中预编码矢量的装置和方法。发送器可以在发送数据向量之前使用关于通信信道的信息对数据向量进行预编码。发射机可以以降低所得到的发送数据向量的能量值的方式来对数据向量进行预编码，以便最小化在接收机处的接收信号中的干扰。发射机可以以迭代方式一个接一个地扰乱数据向量的条目，直到获得发送数据向量的能量值中的最小值。

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