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1. 发明授权

US08694851B1 Adaptive multiple-input multiple-ouput successive interference cancellation receivers 有权
标题翻译：自适应多输入多输出连续干扰消除接收机
公开(公告)号：US08694851B1
公开(公告)日：2014-04-08
申请号：US13210812
申请日：2011-08-16
申请人： Yakun Sun , Jihwan P. Choi , Jiwoong Choi , Hui-Ling Lou
发明人： Yakun Sun , Jihwan P. Choi , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H03M13/00
CPC分类号： H04L1/0054 , H03M13/09 , H03M13/27 , H03M13/29 , H03M13/3738 , H03M13/3746 , H03M13/3776 , H03M13/6331 , H04J11/004 , H04L1/208 , H04L25/03891 , H04L25/067 , H04L2025/03426
摘要： A system including a first receiver module and a first interference canceller module. The first receiver module is configured to receive a first signal including a first set of codewords and to generate a first set of decoded codewords by decoding at least one of the first set of codewords. The first interference canceller module is configured to measure first reliability metrics of codewords corresponding to the first set of decoded codewords; based on the first reliability metrics, select a second set of decoded codewords from the first set; generate a second signal based on the second set of decoded codewords; and subtract at least a portion of the second signal from the first signal to cancel interference of codewords corresponding to the second set of decoded codewords on the second set of codewords in the first signal.
摘要翻译：一种包括第一接收机模块和第一干扰消除器模块的系统。第一接收器模块被配置为接收包括第一组码字的第一信号，并且通过解码第一组码字中的至少一个来生成第一组解码码字。第一干扰消除器模块被配置为测量与第一组解码码字相对应的码字的第一可靠性度量; 基于所述第一可靠性度量，从所述第一集合中选择第二组解码码字; 基于所述第二组解码码字生成第二信号; 并且从所述第一信号中减去所述第二信号的至少一部分，以消除所述第一信号中所述第二码字集合上对应于所述第二解码码字集合的码字的干扰。

2. 发明授权

US08699644B1 Adaptive low-complexity channel estimation 有权
标题翻译：自适应低复杂度信道估计
公开(公告)号：US08699644B1
公开(公告)日：2014-04-15
申请号：US13282952
申请日：2011-10-27
申请人： Yakun Sun , Jiwoong Choi , Hui-Ling Lou , Rapheal Cendrillon
发明人： Yakun Sun , Jiwoong Choi , Hui-Ling Lou , Rapheal Cendrillon
IPC分类号： H04B1/10
CPC分类号： H04L25/0206 , H04L25/0204 , H04L25/0212 , H04L25/022 , H04L25/0228 , H04L27/2647 , H04L27/2649 , H04L27/38 , H04L2025/03535
摘要： Systems, methods, and other embodiments associated with adaptive low-complexity channel estimation are illustrated. In one embodiment a device includes a receiver configured to receive an orthogonal frequency-division multiplexed (OFDM) signal. The device also includes a controller configured to control a switch to select between processing paths based, at least in part, on the channel conditions of the OFDM signal. The processing paths selectable by the switch include a first processing path and a second processing path.
摘要翻译：示出了与自适应低复杂度信道估计相关联的系统，方法和其他实施例。在一个实施例中，设备包括被配置为接收正交频分复用（OFDM）信号的接收机。该设备还包括控制器，其被配置为至少部分地基于OFDM信号的信道条件来控制交换机在处理路径之间进行选择。由开关可选择的处理路径包括第一处理路径和第二处理路径。

3. 发明授权

US08964789B1 Method and system for data synchronization in communication systems using repetitive preamble patterns 有权
标题翻译：使用重复前导码模式的通信系统中数据同步的方法和系统
公开(公告)号：US08964789B1
公开(公告)日：2015-02-24
申请号：US12609862
申请日：2009-10-30
申请人： Jungwon Lee , Jiwoong Choi , Qing Zhao , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Qing Zhao , Hui-Ling Lou
IPC分类号： H04J3/06
CPC分类号： H04L27/2643 , H04L7/042 , H04L27/2613 , H04L27/2656 , H04L2027/0026
摘要： Methods and apparatus for data synchronization in communication systems using repetitive preamble patterns. In one embodiment, a method includes receiving a signal, where the received signal includes a data unit. The data unit includes a preamble symbol, and the preamble symbol has a start time and includes Q portions, each having the same pattern. The method further includes determining multiple possible values of a frame timing (FT). The method further includes determining multiple correlation functions including at least one correlation function corresponding to each of the multiple possible values of the FT, such that a given correlation function corresponding to a given possible value of the FT represents a correlation between data in two non-adjacent portions of the Q portions associated with the given FT. The method further includes selecting one of the multiple possible values of the FT based at least in part on the multiple determined correlation functions.
摘要翻译：使用重复前导码模式的通信系统中的数据同步的方法和装置。在一个实施例中，一种方法包括接收信号，其中所接收的信号包括数据单元。数据单元包括前导符号，并且前导码符号具有开始时间，并且包括各自具有相同模式的Q个部分。该方法还包括确定帧定时（FT）的多个可能值。该方法还包括确定包括与FT的多个可能值中的每一个相对应的至少一个相关函数的多个相关函数，使得对应于FT的给定可能值的给定相关函数表示两个非可变值中的数据之间的相关性，与给定FT相关联的Q部分的相邻部分。该方法还包括至少部分地基于多个确定的相关函数来选择FT的多个可能值中的一个。

4. 发明授权

US08428169B1 MIMO soft demodulation using hard-decision candidate selection 有权
标题翻译：使用硬判决候选选择的MIMO软解调
公开(公告)号：US08428169B1
公开(公告)日：2013-04-23
申请号：US12510037
申请日：2009-07-27
申请人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04L25/03891 , H04B7/0413 , H04B7/0854 , H04L25/067
摘要： Systems and methods for reconstructing digital information in a multiple-input receiver from signals transmitted by a multiple-output transmitter, in a multiple-input multiple-output (MIMO) communications channel are provided. A plurality of signal streams are obtained from a plurality of transmitted signals and a first candidate signal value is selected for each of the plurality of signal streams. A plurality of additional candidate signal values are also selected for each of the plurality of signal streams in response to selecting the first candidate signal value. A log-likelihood ratio (LLR) is computed from the plurality of signal streams based on all of the selected candidate signal values. Digital information may then be estimated based on the computed LLR.
摘要翻译：提供了在多输入多输出（MIMO）通信信道中由多输出发射机发送的信号重建多输入接收机中的数字信息的系统和方法。从多个发送信号中获得多个信号流，并且为多个信号流中的每一个选择第一候选信号值。响应于选择第一候选信号值，还为多个信号流中的每一个选择多个附加候选信号值。基于所选择的所有候选信号值，从多个信号流计算对数似然比（LLR）。然后可以基于所计算的LLR来估计数字信息。

5. 发明授权

US08401127B1 Multi-stream soft demodulation using hard-decision schemes 有权
标题翻译：使用硬判决方案的多流软解调
公开(公告)号：US08401127B1
公开(公告)日：2013-03-19
申请号：US12469382
申请日：2009-05-20
申请人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H04B7/02 , H04B7/08 , H04L1/06 , H04L27/06
CPC分类号： H04B7/0413 , H04L1/0041 , H04L1/0045 , H04L1/06 , H04L25/03242 , H04L25/067
摘要： A method of decoding a signal transmitted via a multiple input multiple output (MIMO) communication channel includes receiving a data symbol vector including multiple data symbols that are received at substantially the same time. The received data symbol vector corresponds to a transmitted data symbol vector including multiple transmitted data symbols corresponding to the plurality of data symbols. The method further includes estimating values for transmitted data symbols in a first group of transmitted data symbols using a hard-decision technique. The method further includes calculating likelihood values for bits in a second group of transmitted data symbols using a soft-decision technique based on the estimated values of transmitted data symbols in the first group of transmitted data symbols. The first group of transmitted data symbols does not overlap with the second group of transmitted symbols.
摘要翻译：一种对通过多输入多输出（MIMO）通信信道发送的信号进行解码的方法包括：接收包括多个数据符号的数据符号向量，该数据符号向量基本上同时被接收。所接收的数据符号向量对应于包括对应于多个数据符号的多个发送数据符号的发送数据符号向量。该方法还包括使用硬判决技术估计第一组发送数据符号中的发送数据符号的值。该方法还包括使用基于所发送的数据符号的第一组中所发送的数据符号的估计值的软判决技术来计算第二组发送数据符号中的比特的似然值。第一组发送数据符号与第二组发送符号不重叠。

6. 发明授权

US08351549B1 Multi-stream demodulation scheme using multiple detectors 有权
标题翻译：使用多个检测器的多流解调方案
公开(公告)号：US08351549B1
公开(公告)日：2013-01-08
申请号：US12562687
申请日：2009-09-18
申请人： Jiwoong Choi , Jungwon Lee , Hui-Ling Lou
发明人： Jiwoong Choi , Jungwon Lee , Hui-Ling Lou
IPC分类号： H04L27/06 , H04L27/28
CPC分类号： H04L1/0631 , H04B7/0413 , H04L1/0054 , H04L25/067 , H04L27/2647 , H04L27/34
摘要： The present disclosure provides methods and apparatus for demodulating a signal transmitted via a multiple input multiple output (MIMO) communication channel. In one embodiment, a method of demodulating a signal transmitted via a MIMO communication channel includes receiving a data symbol vector including multiple data symbols that are received at substantially the same time. The received data symbol vector corresponds to a transmitted data symbol vector. The method further includes generating multiple candidate vectors for the transmitted data symbol vector. The multiple candidate vectors are less than all possible vectors for the transmitted data symbol vector. The method further includes selecting one candidate vector from the multiple candidate vectors using a maximum-likelihood (ML) technique.
摘要翻译：本公开提供了用于解调经由多输入多输出（MIMO）通信信道发送的信号的方法和装置。在一个实施例中，一种解调经由MIMO通信信道发送的信号的方法包括：接收包括在同一时间被接收的多个数据符号的数据符号向量。接收到的数据符号向量对应于发送的数据符号向量。该方法还包括为所发送的数据符号向量生成多个候选向量。多个候选向量小于所发送的数据符号向量的所有可能向量。该方法还包括使用最大似然（ML）技术从多个候选向量中选择一个候选向量。

7. 发明授权

US08238488B1 Multi-stream maximum-likelihood demodulation based on bitwise constellation partitioning 有权
标题翻译：基于逐位星座分割的多流最大似然解调
公开(公告)号：US08238488B1
公开(公告)日：2012-08-07
申请号：US12547285
申请日：2009-08-25
申请人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L25/03203 , H04L25/03331
摘要： A method of decoding a signal includes receiving multiple data symbols corresponding to multiple transmitted data symbols. The method further includes selecting one candidate data symbol from multiple candidate data symbols corresponding to the multiple transmitted data symbols. The method further includes determining a global optimum candidate value for the selected one candidate data symbol. The method further includes grouping all possible values of the selected one candidate data symbol into two or more bit groups. The method further includes selecting a bit group from the two or more bit groups that does not include the global optimum value. The method further includes determining a local optimum candidate value from values in the selected bit group. The method further includes calculating a likelihood value for a bit in the selected one candidate data symbol based at least in part on the determined global and local optimum candidate values.
摘要翻译：解码信号的方法包括接收与多个发送的数据符号对应的多个数据符号。该方法还包括从对应于多个发送的数据符号的多个候选数据符号中选择一个候选数据符号。该方法还包括确定所选择的一个候选数据符号的全局最佳候选值。该方法还包括将所选择的一个候选数据符号的所有可能值分组为两个或更多位组。该方法还包括从不包括全局最优值的两个或多个比特组中选择一个比特组。该方法还包括从所选位组中的值确定局部最佳候选值。该方法还包括至少部分地基于所确定的全局和局部最佳候选值来计算所选择的一个候选数据符号中的比特的似然值。

8. 发明授权

US08437434B1 Multi-stream maximum-likelihood demodulation based on bitwise constellation partitioning 有权
标题翻译：基于逐位星座分割的多流最大似然解调
公开(公告)号：US08437434B1
公开(公告)日：2013-05-07
申请号：US13567960
申请日：2012-08-06
申请人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L25/03203 , H04L25/03331
摘要： A plurality of received data symbols is received, and a first received data symbol is selected from the plurality of received data symbols. A plurality of global optimum candidate values of a first estimated transmitted data symbol corresponding to the first received data symbol is determined for different given candidate values of second estimated transmitted data symbols corresponding to second received data symbols. Likelihood values for bits corresponding to the second estimated transmitted data symbols are calculated using the plurality of global optimum candidate values. All possible values of the first estimated transmitted data symbol are grouped into two or more bit groups, and a plurality of local optimum candidate values are determined for different bit groups. Likelihood values for bits corresponding to the first estimated transmitted data symbol are calculated using the plurality of global optimum candidate values and the plurality of local optimum candidate values.
摘要翻译：接收多个接收到的数据符号，并且从多个接收的数据符号中选择第一接收数据符号。针对对应于第二接收数据符号的第二估计发送数据符号的不同给定候选值确定与第一接收数据符号对应的第一估计发送数据符号的多个全局最优候选值。使用多个全局最优候选值来计算与第二估计发送数据符号对应的位的似然值。第一估计发送数据符号的所有可能值被分组为两个或多个位组，并且针对不同位组确定多个局部最优候选值。使用多个全局最优候选值和多个局部最优候选值来计算与第一估计发送数据符号对应的位的似然值。

9. 发明授权

US07782751B1 Systems and methods for computing a relative path delay between multiple transmission sources 有权
标题翻译：用于计算多个传输源之间相对路径延迟的系统和方法
公开(公告)号：US07782751B1
公开(公告)日：2010-08-24
申请号：US12176976
申请日：2008-07-21
申请人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
发明人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04W40/38 , H04J11/0063 , H04L25/0202 , H04L27/2601
摘要： Systems and methods are provided for computing a relative path delay between multiple transmitting source to select a source that is closest to a receiving device. Preamble sequences unique to each source are received by a receiving device. The receiving devices determines based on a channel estimation or differential algorithm which transmitting source is closer to the receiving device. The channel estimation algorithm computes the path delay based on a channel estimation correlation at different preamble sequence indices. The differential algorithm computes the path delay based on a correlation between the received and transmitted preamble sequences at different preamble sequence indices. The receiving device selects the closer of the multiple sources to be the source from which to extract data.
摘要翻译：提供的系统和方法用于计算多个发送源之间的相对路径延迟，以选择最接近接收设备的源。每个源独有的前导序列由接收设备接收。接收装置基于信道估计或差分算法确定发射源更靠近接收装置。信道估计算法基于在不同前同步码序列索引处的信道估计相关性来计算路径延迟。差分算法基于在不同前同步码序列索引处的接收和发送前同步码序列之间的相关性来计算路径延迟。接收设备选择要从中提取数据的源的更多的源。

10. 发明授权

US08379508B1 Systems and methods for computing a relative path delay between multiple transmission sources 有权
标题翻译：用于计算多个传输源之间的相对路径延迟的系统和方法
公开(公告)号：US08379508B1
公开(公告)日：2013-02-19
申请号：US12835904
申请日：2010-07-14
申请人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
发明人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04W40/38 , H04J11/0063 , H04L25/0202 , H04L27/2601
摘要： Systems and methods are provided for computing a relative path delay between multiple transmitting source to select a source that is closest to a receiving device. Preamble sequences unique to each source are received by a receiving device. The receiving devices determines based on a channel estimation or differential algorithm which transmitting source is closer to the receiving device. The channel estimation algorithm computes the path delay based on a channel estimation correlation at different preamble sequence indices. The differential algorithm computes the path delay based on a correlation between the received and transmitted preamble sequences at different preamble sequence indices. The receiving device selects the closer of the multiple sources to be the source from which to extract data.
摘要翻译：提供的系统和方法用于计算多个发送源之间的相对路径延迟，以选择最接近接收设备的源。每个源独有的前导序列由接收设备接收。接收装置基于信道估计或差分算法确定发射源更靠近接收装置。信道估计算法基于在不同前同步码序列索引处的信道估计相关性来计算路径延迟。差分算法基于在不同前同步码序列索引处的接收和发送前同步码序列之间的相关性来计算路径延迟。接收设备选择要从中提取数据的源的更多的源。

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