公开(公告)号：US08917584B1

公开(公告)日：2014-12-23

申请号：US13751707

申请日：2013-01-28

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jiwoong Choi ,  Jihwan P. Choi

IPC: H04J11/00 ,  H04J3/06 ,  H04W40/38

CPC classification number: H04W40/38 ,  H04J11/0063 ,  H04L25/0202 ,  H04L27/2601

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08861658B1

公开(公告)日：2014-10-14

申请号：US13762046

申请日：2013-02-07

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Sayandev Mukherjee ,  Adina Matache

IPC: H03D1/00 ,  H04W24/00

CPC classification number: H04W24/00 ,  H04B7/10 ,  H04B17/327 ,  H04L27/2601

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08811462B1

公开(公告)日：2014-08-19

申请号：US13942255

申请日：2013-07-15

Applicant: Marvell International Ltd.

Inventor： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

IPC: H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC classification number: H04L27/2656 ,  H04L27/2676

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08769352B1

公开(公告)日：2014-07-01

申请号：US14016425

申请日：2013-09-03

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Jungwon Lee

IPC: G06F11/00 ,  G08C25/02 ,  H03M13/39 ,  H04L1/00

CPC classification number: H04B7/0456 ,  H04B1/10 ,  H04B7/0413 ,  H04J11/004 ,  H04L1/0048 ,  H04L25/03305

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08644433B1

公开(公告)日：2014-02-04

申请号：US13667455

申请日：2012-11-02

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jiwoong Choi ,  Hui-Ling Lou

IPC: H03D1/00

CPC classification number: H04L25/03891 ,  H04B7/0413 ,  H04B7/0854 ,  H04L25/067

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09838156B1

公开(公告)日：2017-12-05

申请号：US15206837

申请日：2016-07-11

Applicant: Marvell International Ltd.

Inventor： Vladan Petrovic ,  Yakun Sun ,  Jungwon Lee

IPC: H04L1/00

CPC classification number: H04L1/0052 ,  H04B7/0891 ,  H04L1/0046 ,  H04L1/0061 ,  H04L1/0067 ,  H04L1/0075 ,  H04L1/08 ,  H04L5/0053 ,  H04L5/0091 ,  H04L25/03891 ,  H04L27/06

Abstract: Systems and methods for performing efficient blind decoding. A first plurality of decision metrics corresponding to a first repetition of periodic decoding information is stored. The first plurality of decision metrics is grouped into sequential portions. A plurality of combined versions of the sequential portions is stored into combining buffers arranged in sequence. Each combined version is associated with a different sequence of timing information. A first of the plurality of combined versions stored in a first of the combining buffers is combined with a second version of a second plurality of decision metrics that corresponds to a second repetition of the periodic decoding information. The second version is associated with timing information adjacent in the timing information sequence to the timing information associated with the first combined version. The data is decoded based on information in the combining buffers.

公开(公告)号：US09166662B1

公开(公告)日：2015-10-20

申请号：US13925206

申请日：2013-06-24

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Yakun Sun

IPC: H04W4/00 ,  H04B7/04 ,  H04L12/933 ,  H04L25/03 ,  H04L25/02

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0608 ,  H04B7/0617 ,  H04B7/0671 ,  H04B7/12 ,  H04L25/0242 ,  H04L25/03898 ,  H04L25/03949 ,  H04L49/101

Abstract: A computer readable storage medium or media stores machine readable instructions that, when executed by one or more processors, cause the processors to generate, using reference signals received via a first communication channel from a first communication device to a second communication device, an estimate of the first communication channel using the received reference signals, calculate one or more transmit beamforming vectors using the estimate of the first communication channel, and utilize the one or more transmit beamforming vectors to process signals to be transmitted via a second communication channel from the second device to the first device. The first device processes the signals to be transmitted from the second device to the first device according to a model H ei, where H is a matrix representing the second communication channel and ei is a vector with all components of ei, except an ith component, being equal to zero.

Abstract translation: 计算机可读存储介质或介质存储机器可读指令，当被一个或多个处理器执行时，使得处理器使用经由第一通信信道从第一通信设备接收的参考信号来生成从第一通信设备到第二通信设备的估计 使用所接收的参考信号的第一通信信道，使用第一通信信道的估计来计算一个或多个发射波束形成向量，并且利用一个或多个发射波束成形向量来处理经由第二通信信道从第二设备发送的信号 到第一个设备。 第一设备根据模型H ei处理要从第二设备发送到第一设备的信号，其中H是表示第二通信信道的矩阵，ei是除了第i个分量之外的所有ei分量的向量， 等于零。

公开(公告)号：US09160436B1

公开(公告)日：2015-10-13

申请号：US14107183

申请日：2013-12-16

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC: H03D1/00 ,  H04L27/06 ,  H04B7/08 ,  H04B1/10

CPC classification number: H04B7/08 ,  H04B1/10 ,  H04B7/0669 ,  H04B7/0845 ,  H04L1/0631 ,  H04L1/0668

Abstract: Systems and methods are provided for decoding a signal vector in a transmit diversity scheme for varying channels. Information obtained in more than one symbol period are treated as a single received vector, and each of the received signal vectors may be processed to reduce the effects of varying channel characteristics. The received signal vectors may be combined by addition and decoded using a maximum-likelihood decoder. In some embodiments, the received signal vectors are processed separately and then combined. In other embodiments, the received signal vectors are combined and then processed. In some embodiments, zero-forced linear equalization techniques are used to processed the received signals. In some embodiments the signal vectors and varying channel response matrices are broken down to equivalent forms in order to simplify the processing.

Abstract translation: 提供了用于对用于不同信道的发射分集方案中的信号矢量进行解码的系统和方法。 在多个符号周期中获得的信息被视为单个接收向量，并且可以处理每个接收信号向量以减少变化的信道特性的影响。 接收的信号矢量可以通过加法组合，并使用最大似然解码器解码。 在一些实施例中，接收的信号向量被单独处理，然后组合。 在其他实施例中，接收的信号向量被组合然后被处理。 在一些实施例中，使用零强制线性均衡技术来处理所接收的信号。 在一些实施例中，为了简化处理，信号向量和变化的信道响应矩阵被分解成等同的形式。

公开(公告)号：US09143210B1

公开(公告)日：2015-09-22

申请号：US14050115

申请日：2013-10-09

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jiwoong Choi

IPC: H04L27/06 ,  H04B7/04

CPC classification number: H04B7/0413 ,  H04L25/03242

Abstract: Methods and apparatus are provided for soft-decision maximum likelihood demodulation to decode a data vector transmitted in a multiple-input multiple-output (MIMO) communications channel. Soft-decision demodulators are disclosed that implement sphere decoding to reduce complexity of demodulation while preserving optimal performance. Candidate signal values associated with the transmitted data vector may be obtained and partitioned into signal bit groups. A sphere search may be performed over the candidate signal values within a search radius value to determine a smallest distance metric for each signal bit group. The search radius value may be updated based on a current smallest distance metric for each signal bit group. A log-likelihood ratio (LLR) may be computed from the determined smallest distance metrics for each signal bit group using a soft-decision demodulator.

Abstract translation: 提供了用于软判决最大似然解调以解码在多输入多输出（MIMO）通信信道中发送的数据向量的方法和装置。 公开了软判决解调器，其实施球解码以降低解调的复杂度，同时保持最佳性能。 可以获得与发送的数据向量相关联的候选信号值并将其划分为信号位组。 可以在搜索半径值内的候选信号值上执行球体搜索，以确定每个信号比特组的最小距离度量。 可以基于每个信号位组的当前最小距离度量来更新搜索半径值。 可以使用软判决解调器从每个信号位组的确定的最小距离度量计算对数似然比（LLR）。

公开(公告)号：US09084133B1

公开(公告)日：2015-07-14

申请号：US13852591

申请日：2013-03-28

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC: H04L27/06 ,  H04W24/02

CPC classification number: H04W24/02 ,  H04L25/0224 ,  H04L25/0244 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2675 ,  H04L27/2695

Abstract: A mobile station including an estimation module, a filter module, and a control module. The estimation module is configured to generate first channel estimates based on an input signal received, through a channel, from a base station. The input signal includes subcarriers used by the base station to transmit preamble sequences. The filter module is configured to generate second channel estimates by filtering the first channel estimates using a first filter or a second filter. The first filter or the second filter is selected according to a number of the subcarriers used to transmit the preamble sequences. The control module is configured to, based on the first channel estimates and the second channel estimates, estimate (i) one of the preamble sequences and (ii) the channel.

Abstract translation: 一种包括估计模块，滤波器模块和控制模块的移动站。 估计模块被配置为基于通过信道从基站接收的输入信号来生成第一信道估计。 输入信号包括由基站用于发送前同步码序列的子载波。 滤波器模块被配置为通过使用第一滤波器或第二滤波器对第一信道估计进行滤波来生成第二信道估计。 第一滤波器或第二滤波器根据用于发送前同步码序列的副载波的数量来选择。 控制模块被配置为基于第一信道估计和第二信道估计来估计（i）前导码序列之一和（ii）信道。