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1. 发明授权

US08687751B1 Multiple-input multiple-output receivers using successive interference cancellation based on cyclic redundancy check 有权
标题翻译：使用基于循环冗余校验的连续干扰消除的多输入多输出接收机
公开(公告)号：US08687751B1
公开(公告)日：2014-04-01
申请号：US13047056
申请日：2011-03-14
申请人： Jungwon Lee , Yakun Sun , Jiwoong Choi , Leilie Song , Adina Matache
发明人： Jungwon Lee , Yakun Sun , Jiwoong Choi , Leilie Song , Adina Matache
IPC分类号： H04B7/10
CPC分类号： H04L1/0048 , H04B7/0413 , H04J11/004
摘要： A system including a first receiver module and a first interference canceller module. The first receiver module generates a first set of decoded codewords by decoding codewords in a received signal and determines if any of the first set of decoded codewords fails cyclic redundancy check (CRC). The first interference canceller module generates a second signal based on a first decoded codeword from the first set of decoded codewords when (i) any of the first set of decoded codewords fails CRC and (ii) the first decoded codeword passes CRC. By subtracting the second signal from the first signal, the first interference canceller module (i) cancels interference of a first codeword, which corresponds to the first decoded codeword, on a second set of codewords, which includes the plurality of codewords and excludes the first codeword and (ii) generates a third signal, which includes the second set of codewords.
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。第一接收机模块通过对接收信号中的码字进行解码来生成第一组解码码字，并且确定第一组解码码字中的任何一个是否失败循环冗余校验（CRC）。当（i）第一组解码码字中的任何一个失败CRC时，和（ii）第一解码码字通过CRC，第一干扰消除器模块基于来自第一组解码码字的第一解码码字生成第二信号。通过从第一信号中减去第二信号，第一干扰消除器模块（i）在包括多个码字的第二组码字上消除与第一解码码字相对应的第一码字的干扰，并且排除第一信号码字和（ii）产生包括第二组码字的第三信号。

2. 发明授权

US08699592B1 Systems and methods for estimating decoder noise power in OFDM systems 有权
标题翻译： OFDM系统中解码器噪声功率估计的系统和方法
公开(公告)号：US08699592B1
公开(公告)日：2014-04-15
申请号：US13157917
申请日：2011-06-10
申请人： Jiwoong Choi , Yakun Sun , Jungwon Lee , Jianyi Huang
发明人： Jiwoong Choi , Yakun Sun , Jungwon Lee , Jianyi Huang
IPC分类号： H04K1/10
CPC分类号： H04B7/0413 , H04L1/0036 , H04L25/0202 , H04L25/0204 , H04L27/2647
摘要： Systems and methods for computing a decoder noise power estimate are provided. A pilot signal transmitted through a fading channel from a wireless transmission source is received. Signal power of the received pilot signal, channel noise power, and channel estimation error are computed. The decoder noise power estimate is determined based on the computed signal power, channel noise power, and channel estimation error.
摘要翻译：提供了用于计算解码器噪声功率估计的系统和方法。接收通过衰落信道从无线发送源发送的导频信号。计算接收到的导频信号的信号功率，信道噪声功率和信道估计误差。基于所计算的信号功率，信道噪声功率和信道估计误差来确定解码器噪声功率估计。

3. 发明授权

US08687750B1 Signal detection with adjustable number of interfering signals 失效
标题翻译：信号检测与可调数量的干扰信号
公开(公告)号：US08687750B1
公开(公告)日：2014-04-01
申请号：US13159931
申请日：2011-06-14
申请人： Jungwon Lee , Jiwoong Choi , Yakun Sun
发明人： Jungwon Lee , Jiwoong Choi , Yakun Sun
IPC分类号： H03D1/04
CPC分类号： H04B1/10 , H04L25/03891 , H04L2025/03426
摘要： Systems, methods, and other embodiments associated with signal detection with an adjustable number of interfering signals. According to one embodiment an apparatus includes an interferer counter, a detection method selector, and a signal detector. The interferer counter is configured to identify a number of active interfering signals in a received signal. The detection method selector is configured to select a signal detection method based, at least in part, on the number of active interfering signals identified by the interferer counter. The signal detector is configured to process the received signal according to the signal detection method selected by the detection method selector to detect an intended signal in the received signal.
摘要翻译：与可调节数量的干扰信号的信号检测相关的系统，方法和其它实施例。根据一个实施例，一种装置包括干扰计数器，检测方法选择器和信号检测器。干扰计数器被配置为识别接收信号中的多个有源干扰信号。检测方法选择器被配置为至少部分地基于由干扰计数器识别的有源干扰信号的数量来选择信号检测方法。信号检测器被配置为根据由检测方法选择器选择的信号检测方法处理接收信号，以检测接收信号中的预期信号。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 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。

10. 发明授权

US08595578B1 Significance of retransmission used in subsequent decoding 有权
标题翻译：在后续解码中使用重传的意义
公开(公告)号：US08595578B1
公开(公告)日：2013-11-26
申请号：US12940784
申请日：2010-11-05
申请人： Jungwon Lee , Jiwoong Choi
发明人： Jungwon Lee , Jiwoong Choi
IPC分类号： H04L1/18
CPC分类号： H04L1/1845 , G06F11/1004 , H04L1/1816 , H04L1/1819
摘要： Systems and techniques relating to wireless communications are described. A described technique includes receiving signals representing wireless data transmissions that are based on a symbol, the received signals including one or more first signals and a second signal, where a decoded version of the one or more first signals previously failed to successfully resolve the symbol. The second signal can be transmitted in response to the one or more first signals failing to successfully resolve the symbol. The technique includes determining the symbol based on the received signals, where the determining places more significance to the second signal than the one or more first signals.
摘要翻译：描述与无线通信相关的系统和技术。所描述的技术包括接收表示基于符号的无线数据传输的信号，所接收的信号包括一个或多个第一信号和第二信号，其中一个或多个第一信号的解码版本先前未成功地解析该符号。可以响应于一个或多个第一信号不能成功解析符号而发送第二信号。该技术包括基于接收到的信号确定符号，其中确定比第一信号比第二信号更有意义。

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