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21. 发明授权

US08781042B1 Systems and methods for calibrating digital baseband DC offset in an OFDM receiver 有权
标题翻译：用于在OFDM接收机中校准数字基带DC偏移的系统和方法
公开(公告)号：US08781042B1
公开(公告)日：2014-07-15
申请号：US14050893
申请日：2013-10-10
申请人： Marvell International Ltd.
发明人： Qing Zhao , Souvik Dihidar , Leilei Song , Jungwon Lee
IPC分类号： H03D1/04
CPC分类号： H04L27/2647 , H04L25/06
摘要： In accordance with the teachings described herein, systems and methods are provided for calibrating DC offset in a receiver. A DC calibration circuit may be used that is configured to receive a digital multi-carrier modulated (MCM) signal that includes a sequence of MCM symbols. The DC calibration circuit may include an accumulator and a compensator. The accumulator may be used to determine an estimated DC offset of a current MCM symbol in the sequence of MCM symbols. The compensator may be used to remove the estimated DC offset from a next MCM symbol in the sequence of MCM symbols. The accumulator may also be used to receive a plurality of digital samples that comprise the current MCM symbol and to determine the estimated DC offset by calculating an average of the plurality of digital samples.
摘要翻译：根据本文所述的教导，提供了用于校准接收机中的DC偏移的系统和方法。可以使用DC校准电路，其被配置为接收包括MCM符号序列的数字多载波调制（MCM）信号。 DC校准电路可以包括蓄电池和补偿器。可以使用累加器来确定MCM符号序列中的当前MCM符号的估计DC偏移。补偿器可以用于从MCM符号序列中的下一个MCM符号中去除估计的DC偏移。累加器还可以用于接收包括当前MCM符号的多个数字样本，并且通过计算多个数字样本的平均值来确定估计的DC偏移。

22. 发明授权

US08718204B1 Multi-stream maximum-likelihood demodulation based on bitwise constellation partitioning 失效
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：US08718204B1
公开(公告)日：2014-05-06
申请号：US13888214
申请日：2013-05-06
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong P. Choi , Hui-Ling Lou
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L25/03203 , H04L25/03331
摘要： One of a plurality of candidate data symbols is selected. All possible values of the selected one candidate data symbol are grouped into two or more bit groups. A bit group is selected from the two or more bit groups. A local optimum candidate value from values in the selected bit group is determined for the selected one candidate data symbol for a given set of values corresponding to all of the plurality of candidate data symbols but the selected one candidate data symbol, the local optimum candidate value minimizing a distance value corresponding to a distance between the received data symbol vector and a channel matrix multiplied with the candidate vector, without calculating the distance value. A likelihood value is calculated for a bit in the selected one candidate data symbol based at least in part on the determined local optimum candidate value.
摘要翻译：选择多个候选数据符号中的一个。所选择的一个候选数据符号的所有可能值被分组为两个或更多位组。从两个或多个位组中选择一个位组。对于对应于所有多个候选数据符号但所选择的一个候选数据符号的给定值的集合，为所选择的一个候选数据符号确定所选位组中的值的局部最佳候选值，最小化与所接收的数据符号向量和与候选向量相乘的信道矩阵之间的距离相对应的距离值，而不计算距离值。至少部分地基于所确定的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。

23. 发明授权

US08711990B1 Frame syncrhonization in orthogonal frequency-division multiplexing systems 有权
标题翻译：正交频分复用系统中的帧同步
公开(公告)号：US08711990B1
公开(公告)日：2014-04-29
申请号：US13872740
申请日：2013-04-29
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Qing Zhao
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04L5/0007 , H04L25/0224 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2662
摘要： A system including a demodulation module, a metric generation module, and a preamble detection module. The demodulation module is configured to generate demodulated signals based on demodulating, in accordance with a differential demodulation scheme, signals received from a base station. The signals received from the base station include a plurality of symbols. The demodulated signals comprise a plurality of real parts each having a corresponding magnitude. The metric generation module is configured to generate a plurality of metrics for the plurality of symbols based on the corresponding magnitudes of the plurality of real parts of the demodulated signals. The preamble detection module is configured to detect, based on the plurality of metrics, whether the plurality of symbols in the signals received from the base station includes a preamble symbol.
摘要翻译：一种包括解调模块，度量生成模块和前导码检测模块的系统。解调模块被配置为基于根据差分解调方案解调从基站接收的信号来产生解调信号。从基站接收的信号包括多个符号。解调信号包括多个具有相应幅度的实数部分。度量生成模块被配置为基于解调信号的多个实部的相应大小来生成多个符号的多个度量。前导码检测模块被配置为基于多个度量来检测从基站接收的信号中的多个符号是否包括前导码符号。

24. 发明授权

US08619841B1 Transceiver with carrier frequency offset based parameter adjustment 有权
标题翻译：基于载波频率偏移的收发器参数调整
公开(公告)号：US08619841B1
公开(公告)日：2013-12-31
申请号：US13675516
申请日：2012-11-13
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
IPC分类号： H04B1/38 , H04L25/02 , H04L27/00 , H04L7/00 , H04L23/00
CPC分类号： H04L27/2657 , H04B7/01
摘要： A transceiver configured to be implemented in a first device includes transmitter and receiver modules and first and second estimator modules. The receiver module receives a first signal transmitted on a channel from a second device to the first device. The first estimator module estimates a first parameter associated with the first signal or the channel. The second estimator module estimates a carrier frequency offset based on the first parameter. The carrier frequency offset is a difference between a first carrier frequency of the first device, and a second carrier frequency of the second device. The transmitter module adjusts a second parameter based on the carrier frequency offset, and based on the second parameter, transmits a second signal to the second device or the receiver module adjusts a third parameter based on the carrier frequency offset, and based on the third parameter, receives a third signal from the second device.
摘要翻译：被配置为在第一设备中实现的收发器包括发射器和接收器模块以及第一和第二估计器模块。接收器模块接收在从第二设备到第一设备的信道上发送的第一信号。第一估计器模块估计与第一信号或通道相关联的第一参数。第二估计器模块基于第一参数估计载波频率偏移。载波频率偏移是第一装置的第一载波频率和第二装置的第二载波频率之间的差。发射机模块基于载波频率偏移来调整第二参数，并且基于第二参数，将第二信号发送到第二设备，或者接收机模块基于载波频率偏移来调整第三参数，并且基于第三参数从第二设备接收第三信号。

25. 发明授权

US09838156B1 Systems and methods for performing efficient blind decoding at a wireless receiver 有权
公开(公告)号：US09838156B1
公开(公告)日：2017-12-05
申请号：US15206837
申请日：2016-07-11
申请人： Marvell International Ltd.
发明人： Vladan Petrovic , Yakun Sun , Jungwon Lee
IPC分类号： H04L1/00
CPC分类号： H04L1/0052 , H04B7/0891 , H04L1/0046 , H04L1/0061 , H04L1/0067 , H04L1/0075 , H04L1/08 , H04L5/0053 , H04L5/0091 , H04L25/03891 , H04L27/06
摘要： 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.

26. 发明授权

US09166662B1 Methods and apparatus for antenna spoofing 有权
标题翻译：天线欺骗的方法和装置
公开(公告)号：US09166662B1
公开(公告)日：2015-10-20
申请号：US13925206
申请日：2013-06-24
申请人： MARVELL INTERNATIONAL LTD.
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Yakun Sun
IPC分类号： H04W4/00 , H04B7/04 , H04L12/933 , H04L25/03 , H04L25/02
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0608 , H04B7/0617 , H04B7/0671 , H04B7/12 , H04L25/0242 , H04L25/03898 , H04L25/03949 , H04L49/101
摘要： 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.
摘要翻译：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。

27. 发明授权

US09160436B1 Optimal decoding of transmit diversity code with varying channel characteristics 有权
标题翻译：具有不同信道特性的发射分集码的最优解码
公开(公告)号：US09160436B1
公开(公告)日：2015-10-13
申请号：US14107183
申请日：2013-12-16
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H03D1/00 , H04L27/06 , H04B7/08 , H04B1/10
CPC分类号： H04B7/08 , H04B1/10 , H04B7/0669 , H04B7/0845 , H04L1/0631 , H04L1/0668
摘要： 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.
摘要翻译：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。

28. 发明授权

US09143210B1 Soft sphere decoder for MIMO maximum likelihood demodulation 有权
标题翻译：用于MIMO最大似然解调的软球解码器
公开(公告)号：US09143210B1
公开(公告)日：2015-09-22
申请号：US14050115
申请日：2013-10-09
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jiwoong Choi
IPC分类号： H04L27/06 , H04B7/04
CPC分类号： H04B7/0413 , H04L25/03242
摘要： 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.
摘要翻译：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）。

29. 发明授权

US09084133B1 Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
标题翻译：正交频分复用系统的信道和前导序列的联合估计
公开(公告)号：US09084133B1
公开(公告)日：2015-07-14
申请号：US13852591
申请日：2013-03-28
申请人： Marvell International Ltd.
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou
IPC分类号： H04L27/06 , H04W24/02
CPC分类号： H04W24/02 , H04L25/0224 , H04L25/0244 , H04L27/2613 , H04L27/2656 , H04L27/2675 , H04L27/2695
摘要： 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.
摘要翻译：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。

30. 发明授权

US09031145B1 Low complexity technique for log-likelihood ratio computation 有权
标题翻译：对数似然比计算的低复杂度技术
公开(公告)号：US09031145B1
公开(公告)日：2015-05-12
申请号：US14291473
申请日：2014-05-30
申请人： Marvell International Ltd.
发明人： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
IPC分类号： H04L23/02 , H04L5/12 , H04B7/04
CPC分类号： H04B7/0413 , H04L25/03242 , H04L25/03961 , H04L25/067 , H04L2025/03414 , H04L2025/0342
摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.
摘要翻译：用于检测多输入/多输出信号中的数据的系统和方法。该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。计算接收到的第二信号与每个可能的第二数据值之间的距离值。计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。基于确定的距离值来确定对数似然比。

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