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41. 发明授权

US08989314B1 Method and apparatus for jointly decoding independently encoded signals 有权
标题翻译：用于联合解码独立编码信号的方法和装置
公开(公告)号：US08989314B1
公开(公告)日：2015-03-24
申请号：US14215160
申请日：2014-03-17
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jihwan P. Choi
IPC分类号： H03D1/24
CPC分类号： H04L1/0048 , H04L1/0041 , H04L25/03248 , H04L27/3488 , H04L2001/0093
摘要： A computer-readable medium stores instructions causing one or more processors to demodulate a received signal including a plurality of user signals. Respective user data in each of at least some of the plurality of user signals is encoded with a respective finite state machine encoder having a respective number of states Si, wherein i=1, 2, . . . , N, N being the number of users, and wherein at least a first user signal and a second user signal are encoded independently of each other. The instructions cause the processor(s) to calculate distances between transmit symbols in the received signal and an expected joint symbol value, and jointly decode, with a finite state machine decoder, user data in the demodulated received signal, including at least first user data corresponding to the first user signal, based on the calculated distances. The finite state machine decoder has S1*S2* . . . *SN states.
摘要翻译：计算机可读介质存储使一个或多个处理器解调包括多个用户信号的接收信号的指令。多个用户信号中的至少一些用户信号中的每一个中的相应用户数据用具有相应数量的状态Si的相应的有限状态机编码器进行编码，其中i = 1,2。。。，N，N是用户的数量，并且其中至少第一用户信号和第二用户信号被彼此独立地编码。指令使处理器计算接收信号中的发送符号与期望的联合符号值之间的距离，并且与有限状态机解码器共同解码解调的接收信号中的用户数据，包括至少第一用户数据对应于第一用户信号，基于所计算的距离。有限状态机解码器具有S1 * S2 *。。。 * SN状态。

42. 发明授权

US08958287B1 Systems and methods for directing a beam towards a device in the presence of interference based on reciprocity 有权
标题翻译：在存在基于互易性的干扰的情况下将光束引向设备的系统和方法
公开(公告)号：US08958287B1
公开(公告)日：2015-02-17
申请号：US13942156
申请日：2013-07-15
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jihwan P. Choi
IPC分类号： G01R31/08 , H04B7/04
CPC分类号： H04B7/0456 , H04B7/0617
摘要： Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received at a receiving device. The received beam is affected by an interference signal from an interfering source. The receiving device computes a covariance matrix that represents a channel estimate associated with the interfering source. The receiving device modifies a predetermined sounding signal based on the covariance matrix for transmission to the transmission source. The receiving device causes the transmission source to estimate an equivalent channel matrix based on the predetermined sounding signal and the modified predetermined sounding signal. The equivalent channel matrix represents the channel estimate associated with the interfering source and a channel estimate associated with the transmission source.
摘要翻译：提供了用于在存在干扰的情况下将光束引向接收装置的方法和装置。在接收装置处接收由发送源发送的波束。接收的波束受来自干扰源的干扰信号的影响。接收设备计算表示与干扰源相关联的信道估计的协方差矩阵。接收装置根据用于发送到发送源的协方差矩阵修改预定的发声信号。接收装置使得发送源基于预定的探测信号和修改的预定探测信号来估计等效信道矩阵。等效信道矩阵表示与干扰源相关联的信道估计和与传输源相关联的信道估计。

43. 发明授权

US08917584B1 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：US08917584B1
公开(公告)日：2014-12-23
申请号：US13751707
申请日：2013-01-28
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi , Jihwan P. Choi
IPC分类号： H04J11/00 , H04J3/06 , H04W40/38
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。

44. 发明授权

US08861658B1 Signal power estimation for cellular OFDM systems 有权
标题翻译：蜂窝OFDM系统的信号功率估计
公开(公告)号：US08861658B1
公开(公告)日：2014-10-14
申请号：US13762046
申请日：2013-02-07
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Sayandev Mukherjee , Adina Matache
IPC分类号： H03D1/00 , H04W24/00
CPC分类号： H04W24/00 , H04B7/10 , H04B17/327 , H04L27/2601
摘要： Signal power of a received signal, which has a plurality of preamble sequences associated with sub-carrier signals received from a plurality of sub-carriers, in a cellular Orthogonal Frequency Division Multiplexing system may be estimated by estimating as power for at least one preamble sequence of a signal received at a selected receive antenna. The preamble sequence is associated with a base station and a set of sub-carriers. A differential received signal developed for one of the set of sub-carriers is correlated with a normalized differential transmit signal for the preamble sequence, and the estimate of the power for the at least one preamble sequence is extracted based on the correlation.
摘要翻译：在蜂窝正交频分复用系统中，具有与从多个子载波接收的子载波信号相关联的多个前导码序列的接收信号的信号功率可以通过估计作为至少一个前同步码序列的功率来估计在选定的接收天线处接收的信号。前导序列与基站和一组子载波相关联。对于一组子载波中的一个发展的差分接收信号与用于前导码序列的归一化差分发送信号相关，并且基于相关性提取至少一个前导序列的功率估计。

45. 发明授权

US08811462B1 Frame synchronization method and apparatus 有权
标题翻译：帧同步方法和装置
公开(公告)号：US08811462B1
公开(公告)日：2014-08-19
申请号：US13942255
申请日：2013-07-15
申请人： Marvell International Ltd.
发明人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
IPC分类号： H04B3/46 , H04B17/00 , H04Q1/20
CPC分类号： H04L27/2656 , H04L27/2676
摘要： A receiver device detects a plurality of symbols in a signal and determines, based on the one of the plurality of detected symbols, an estimated beginning of a subsequent frame. The receiver device determines whether the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. When the estimated start of the subsequent frame corresponds to the actual start of the subsequent frame, the receiver is synchronized to the actual start of the frame. When the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the receiver device determines, based on a further one of the plurality of detected symbols, an estimated beginning of another subsequent frame. The receiver device determines whether the estimated start of the other subsequent frame corresponds to an actual start of the other subsequent frame.
摘要翻译：接收机设备检测信号中的多个符号，并且基于多个检测符号中的一个确定后续帧的估计开始。接收机设备确定后续帧的估计开始是否对应于后续帧的实际开始。当后续帧的估计开始对应于后续帧的实际开始时，接收机与帧的实际开始同步。当后续帧的估计开始不对应于后续帧的实际开始时，接收机设备基于多个检测到的符号中的另一个确定另一后续帧的估计开始。接收机设备确定其他后续帧的估计开始是否对应于另一个后续帧的实际开始。

46. 发明授权

US08769352B1 Methods and apparatus for multiple input multiple output (MIMO) successive interference cancellation (SIC) with retransmissions 有权
标题翻译：具有重传的多输入多输出（MIMO）连续干扰消除（SIC）的方法和装置
公开(公告)号：US08769352B1
公开(公告)日：2014-07-01
申请号：US14016425
申请日：2013-09-03
申请人： Marvell International Ltd.
发明人： Yakun Sun , Jungwon Lee
IPC分类号： G06F11/00 , G08C25/02 , H03M13/39 , H04L1/00
CPC分类号： H04B7/0456 , H04B1/10 , H04B7/0413 , H04J11/004 , H04L1/0048 , H04L25/03305
摘要： Systems and methods are provided for determining a successive interference cancellation (SIC) decoding ordering in a multiple input multiple output transmission (MIMO) system with retransmissions. A plurality of codewords is transmitted in a current transmission time. Some of the codewords may have been previously transmitted in previous transmission attempts according to a retransmission protocol. The plurality of codewords is received and an ordering metric is computed for a received codeword based on channels associated with multiple transmission attempts of the codeword. A decoding ordering of the codewords is determined based on the computed ordering metric. Performance parameters such as Packet Error Rate (PER), channel gain, and/or equalizer-output Signal-to-Interference and Noise Ratio (SINR) may be used to evaluate a channel quality for each one of the transmission attempts of the codeword. The ordering metric may be updated recursively with each transmission attempt.
摘要翻译：提供了用于在具有重发的多输入多输出传输（MIMO）系统中确定连续干扰消除（SIC）解码排序的系统和方法。在当前传输时间内发送多个码字。根据重传协议，先前的传输尝试中可能已经先前传送了一些码字。接收多个码字，并且基于与码字的多个发送尝试相关联的信道对接收到的码字计算排序度量。基于所计算的排序度量来确定码字的解码排序。可以使用诸如分组差错率（PER），信道增益和/或均衡器输出信号与干扰和噪声比（SINR）的性能参数来评估码字的每个传输尝试的信道质量。每个传输尝试可以递归地更新排序度量。

47. 发明授权

US08644433B1 MIMO soft demodulation using hard-decision candidate selection 失效
标题翻译：使用硬判决候选选择的MIMO软解调
公开(公告)号：US08644433B1
公开(公告)日：2014-02-04
申请号：US13667455
申请日：2012-11-02
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi , Hui-Ling Lou
IPC分类号： H03D1/00
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。

48. 发明授权

US09246621B1 Transmit diversity technique based on channel randomization for orthogonal frequency division multiplexing systems 有权
标题翻译：基于正交频分复用系统信道随机化的发射分集技术
公开(公告)号：US09246621B1
公开(公告)日：2016-01-26
申请号：US14679630
申请日：2015-04-06
申请人： Marvell International LTD.
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04J11/00 , H04B7/08 , H04B7/04 , H04L27/26 , H04L1/06
CPC分类号： H04J11/0063 , H04B7/0413 , H04B7/0456 , H04B7/0615 , H04B7/0885 , H04L1/0606 , H04L27/2626 , H04L27/2647
摘要： A system including a first gain module and a second gain module. The first gain module is configured to receive first signals generated based on a plurality of data streams mapped to a plurality of antennas including a first antenna and a second antenna, and to apply a first gain corresponding to the first antenna to the first signals. The second gain module is configured to receive second signals generated based on the plurality of data streams, and to apply a second gain corresponding to the second antenna to the second signals. The second signals are different than the first signals. The second gain is different than the first gain.
摘要翻译：一种包括第一增益模块和第二增益模块的系统。第一增益模块被配置为接收基于映射到包括第一天线和第二天线的多个天线的多个数据流生成的第一信号，并且将对应于第一天线的第一增益应用于第一信号。第二增益模块被配置为接收基于多个数据流生成的第二信号，并且将对应于第二天线的第二增益应用于第二信号。第二信号与第一信号不同。第二增益与第一增益不同。

49. 发明授权

US09106371B1 Link adaptation for OFDM systems 有权
标题翻译： OFDM系统的链路适配
公开(公告)号：US09106371B1
公开(公告)日：2015-08-11
申请号：US14221997
申请日：2014-03-21
申请人： MARVELL INTERNATIONAL LTD.
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou
IPC分类号： H04B15/00 , H04L1/00 , H04W24/08
CPC分类号： H04L1/0019 , H04L1/0003 , H04L1/0009 , H04L1/203 , H04L5/0007 , H04L5/0046 , H04W24/08
摘要： In a method implemented in a communication device, an interference metric associated with a communication link is determined. Determining the interference metric includes obtaining a plurality of measurements indicative of quality of the communication link, and calculating the interference metric using (i) a mean of the plurality of measurements and (ii) a standard deviation of the plurality of measurements. A modulation and coding scheme is selected based on at least the interference metric, and at least one packet is caused to be modulated and coded according to the selected modulation and coding scheme prior to transmission over the communication link.
摘要翻译：在通信设备中实现的方法中，确定与通信链路相关联的干扰度量。确定干扰度量包括获得指示通信链路的质量的多个测量，以及使用（i）多个测量的平均值和（ii）多个测量的标准偏差来计算干扰度量。基于至少干扰度量来选择调制和编码方案，并且在通过通信链路进行传输之前，根据所选择的调制和编码方案使至少一个分组被调制和编码。

50. 发明授权

US09094063B1 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：US09094063B1
公开(公告)日：2015-07-28
申请号：US13846361
申请日：2013-03-18
申请人： MARVELL INTERNATIONAL LTD.
发明人： Jungwon Lee , Hui-Ling Lou , Jiwoong Choi
IPC分类号： H04B7/02 , H04B7/08 , H04L1/06 , H04L27/06 , H04B7/04
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. The method includes receiving a data symbol vector having a plurality of data symbols received via a plurality of spatial streams. The received data symbol vector corresponds to a transmitted data symbol vector having a plurality of transmitted data symbols corresponding to the plurality of data symbols. The method also includes estimating, using a hard-decision technique, one or more respective values for one or more first transmitted data symbols in a first set of one or more spatial streams. The method additionally includes calculating, using a soft-decision technique and based on the estimated one or more respective values for the one or more first transmitted data symbols, likelihood values for bits corresponding to one or more second transmitted data symbols in a second set of one or more spatial streams.
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。该方法包括接收经由多个空间流接收的具有多个数据符号的数据符号向量。所接收的数据符号向量对应于具有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在一个或多个空间流的第一组中的一个或多个第一发送数据符号的一个或多个相应值。该方法另外包括使用软判决技术并且基于所估计的一个或多个第一发送数据符号的相应值来计算与第一组中的一个或多个第一发送数据符号中的一个或多个第二发送数据符号相对应的位的似然值一个或多个空间流。

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