公开(公告)号：US20170063588A1

公开(公告)日：2017-03-02

申请号：US15337530

申请日：2016-10-28

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Yakun SUN ,  Mingguang Xu ,  Hongyuan Zhang ,  Liwen Chu ,  Lei Wang ,  Hui-Ling Lou ,  Jinjing Jiang

IPC: H04L27/26 ,  H04W72/04

CPC classification number: H04L5/0007 ,  H04L5/0025 ,  H04L5/0037 ,  H04L5/0094 ,  H04L27/2602 ,  H04L27/2608 ,  H04L27/2613 ,  H04W84/12

Abstract: For a first group of devices having a first group size, a set of block allocations is selected from a codebook. A block allocation for the first group of devices is selected from the selected set of block allocations. A corresponding integer number of different orthogonal frequency division multiplexing (OFDM) tone blocks is assigned to each device of the first group of devices according to the allocation. An orthogonal frequency division multiple access (OFDMA) data unit to be transmitted to the first group of devices via the WLAN communication channel is generated using the assigned set of OFDM tone blocks. The OFDMA data unit includes a preamble portion and a data portion, the preamble portion having an index to the codebook that indicates i) the first group size, and ii) the selected block allocation.

Abstract translation: 对于具有第一组大小的第一组设备，从码本中选择一组块分配。 从所选择的块分配集中选择第一组设备的块分配。 根据分配，对第一组设备的每个设备分配对应的整数个不同的正交频分复用（OFDM）音调块。 使用所分配的一组OFDM音调块来生成经由WLAN通信信道发送到第一组设备的正交频分多址（OFDMA）数据单元。 OFDMA数据单元包括前导码部分和数据部分，前导码部分具有指示码本的索引，其指示i）第一组大小，以及ii）所选择的块分配。

公开(公告)号：US09215121B1

公开(公告)日：2015-12-15

申请号：US14309657

申请日：2014-06-19

Applicant: MARVELL INTERNATIONAL LTD.

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

IPC: H04L27/00 ,  H04L27/26

CPC classification number: H04L27/2627 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0087 ,  H04L25/0204 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A plurality of diagonal matrices Ci is determined, where the plurality of diagonal matrices Ci is for modifying a plurality of transmit signals to be transmitted via a plurality of transmit antennas, each diagonal matrix Ci for modifying an i-th block of sub-carriers, adjacent in frequency, in the plurality of transmit signals. The plurality of diagonal matrices Ci is used to modify the plurality of transmit signals to implement transmit diversity.

Abstract translation: 确定多个对角矩阵Ci，其中多个对角矩阵Ci用于修改要经由多个发射天线发射的多个发射信号，用于修改第i个子载波块的每个对角矩阵Ci， 频率相邻的多个发送信号。 多个对角矩阵Ci用于修改多个发射信号以实现发射分集。

公开(公告)号：US09166854B1

公开(公告)日：2015-10-20

申请号：US14633659

申请日：2015-02-27

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Kok-Wui Cheong

IPC: H04L27/06 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04L27/2649 ,  H03M13/4107 ,  H04B7/0857 ,  H04L1/0047 ,  H04L1/0054 ,  H04L25/0202 ,  H04L25/03159 ,  H04L25/03286

Abstract: A baseband processor for a receiver. The baseband processor includes a channel estimator configured to generate an estimate of a communication channel based on a baseband signal. The baseband signal corresponds to a radio frequency signal received by the receiver. A demodulator is configured to generate, based on the baseband signal and the estimate of the communication channel, channel state information corresponding to the communication channel, and generate, based on the estimate of the communication channel, a demodulated symbol, wherein the demodulated symbol incorporates the channel state information. A decoder is configured to generate branch metrics for the demodulated symbol using the estimate of the communication channel as received from the channel estimator and the demodulated symbol as received from the demodulator, and perform decoding on the demodulated symbol, using the branch metrics for the demodulated symbol, in order to generate a decoded symbol.

Abstract translation: 用于接收器的基带处理器。 基带处理器包括被配置为基于基带信号生成通信信道的估计的信道估计器。 基带信号对应于由接收机接收的射频信号。 解调器被配置为基于通信信道的基带信号和估计来生成对应于通信信道的信道状态信息，并且基于通信信道的估计生成解调符号，其中解调符号包含 通道状态信息。 解码器被配置为使用从信道估计器接收的通信信道的估计和从解调器接收的解调符号来生成解调符号的分支度量，并且使用解调的分支度量对解调的符号执行解码 符号，以便生成解码符号。

公开(公告)号：US09166740B1

公开(公告)日：2015-10-20

申请号：US14165893

申请日：2014-01-28

Applicant: Marvell International Ltd.

Inventor： Adina Matache ,  Leilei Song ,  Bhaskar V. Nallapureddy ,  Hui-Ling Lou

IPC: H03M13/45 ,  H04L1/00 ,  H04L25/03 ,  H04L5/12 ,  H04L27/06

CPC classification number: H04L1/0054 ,  H03M13/45 ,  H04L25/03171 ,  H04L25/03242 ,  H04L25/03318

Abstract: Systems and methods are provided for determining a data value for a bit of interest in a received data signal. A closest 0-bit symbol candidate is selected from a plurality of 0-bit symbol candidates using a symbol selection distance approximation. A closest 1-bit symbol candidate is selected from a plurality of 1-bit symbol candidates using the symbol selection distance approximation. A 0-bit distance between the received data signal and the selected 0-bit symbol candidate is determined, and a 1-bit distance between the received data signal and the selected 1-bit symbol candidate is determined. A log likelihood ratio is calculated for the bit of interest using the determined 0-bit distance and the determined 1-bit distance.

Abstract translation: 系统和方法被提供用于确定接收到的数据信号中感兴趣的位的数据值。 使用符号选择距离近似从多个0位符号候选中选择最接近的0位符号候选。 使用符号选择距离近似，从多个1位符号候选中选择最接近的1位符号候选。 确定接收到的数据信号和所选择的0位符号候选之间的0比特距离，并确定接收到的数据信号与所选择的1比特符号候选之间的1比特距离。 使用所确定的0比特距离和所确定的1比特距离来计算感兴趣比特的对数似然比。

公开(公告)号：US09042466B1

公开(公告)日：2015-05-26

申请号：US14159541

申请日：2014-01-21

Applicant: Marvell International LTD.

Inventor： Hui-Ling Lou ,  Kok-Wui Cheong ,  Randy Tsang

IPC: H04L27/00 ,  H04B1/38

CPC classification number: H04B1/38 ,  H04B7/0413 ,  H04B7/0891 ,  H04L1/0002 ,  H04L1/0625 ,  H04L5/0003 ,  H04L5/003 ,  H04L25/03343 ,  H04L2025/03426

Abstract: A wireless communication device including a transceiver, a medium access control device, a first module and a second module. The transceiver is configured to receive a signal on a channel. The medium access control device is configured to determine a parameter, wherein the parameter is a rank of a matrix of the channel, an angle of array of the signal, a packet error rate of the signal, a frame error rate of the signal, or a signal-to-noise ratio of the signal. The first module is configured to, based on the parameter, determine whether an operating environment of the wireless communication device is a rich-scattering environment or a line of sight environment. The second module is configured to adjust a bandwidth of the wireless communication device based on the operating environment as determined by the first module.

Abstract translation: 一种无线通信设备，包括收发器，介质访问控制设备，第一模块和第二模块。 收发器被配置为在信道上接收信号。 介质访问控制设备被配置为确定参数，其中参数是信道的矩阵的秩，信号的阵列角度，信号的分组错误率，信号的帧错误率，或者 信号的信噪比。 第一模块被配置为基于该参数来确定无线通信设备的操作环境是富散射环境还是视线环境。 第二模块被配置为基于由第一模块确定的操作环境来调整无线通信设备的带宽。

公开(公告)号：US08976905B1

公开(公告)日：2015-03-10

申请号：US14169317

申请日：2014-01-31

Applicant: Marvell International Ltd.

Inventor： Quan Zhou ,  Songping Wu ,  Hui-Ling Lou

IPC: H04L27/22 ,  H04B1/10

CPC classification number: H04B1/1027 ,  H03D3/22 ,  H04L27/0014 ,  H04L27/156 ,  H04L27/16

Abstract: A robust differential receiver is described that may be used in any frequency modulated system, including short-range radio frequency (RF) communication devices. The differential receiver provides a preamble detection approach that reduces false preamble detection, a fine carrier frequency (CFO) estimation approach that provides an extended estimation range, and robust in-band and out-of-band interference detection. The described differential receiver assures that preamble detections are not falsely triggered, and that CFO estimates are based on accurately modeled preamble waveforms that have not been distorted by phase ambiguities or in-band distortion. In this manner, the described robust differential receiver assures that CFO estimates used to compensate remaining portions of detected signals are accurate, thereby reducing the likelihood that remaining portions of the detected signal will be affected by phase ambiguity distortions, thereby enhancing the differential receiver's ability to lock onto an otherwise unavailable communication channel, and/or reducing transmission errors and/or packet loss.

Abstract translation: 描述了可用于包括短距离射频（RF）通信设备在内的任何调频系统中的鲁棒差分接收机。 差分接收机提供减少伪前导码检测的前导码检测方法，提供扩展估计范围的精细载波频率（CFO）估计方法以及鲁棒带内和带外干扰检测。 所描述的差分接收器确保前导码检测不被错误触发，并且CFO估计基于没有被相位模糊或带内失真扭曲的精确建模的前导码波形。 以这种方式，所描述的鲁棒差分接收机确保用于补偿检测到的信号的剩余部分的CFO估计是准确的，从而降低检测信号的剩余部分将受相位模糊度失真影响的可能性，从而增强差分接收机的能力 锁定到否则不可用的通信信道，和/或减少传输错误和/或分组丢失。

公开(公告)号：US08971459B1

公开(公告)日：2015-03-03

申请号：US14278514

申请日：2014-05-15

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Kok-Wui Cheong

IPC: H04L27/06 ,  H04L27/26

CPC classification number: H04L27/2649 ,  H03M13/4107 ,  H04B7/0857 ,  H04L1/0047 ,  H04L1/0054 ,  H04L25/0202 ,  H04L25/03159 ,  H04L25/03286

Abstract: A receiver including a plurality of receiver pathways. The plurality of receiver pathways are configured to receive, via respective receive antennas, a radio frequency signal transmitted over a communication channel and generate a plurality of respective baseband signals corresponding to the radio frequency signal. A channel estimator is configured to generate an estimate of the channel based on the plurality of respective baseband signals. A demodulator is configured to generate, based on the plurality of respective baseband signals and the estimate of the channel, channel state information corresponding to the communication channel, perform maximum ratio combining on the plurality of respective baseband signals using the channel state information, and generate, based on the estimate of the channel, a plurality of demodulated symbols that incorporate the channel state information. A decoder is configured to perform decoding on the plurality of demodulated symbols to generate respective decoded symbols.

Abstract translation: 一种接收机，包括多个接收机路径。 多个接收机路径被配置为经由相应的接收天线接收通过通信信道发送的射频信号，并且生成对应于该射频信号的多个相应的基带信号。 信道估计器被配置为基于多个相应的基带信号来生成信道的估计。 解调器被配置为基于多个相应的基带信号和与通信信道相对应的信道状态信息来生成信道状态信息，使用信道状态信息对多个相应的基带信号执行最大比率合并，并且生成 基于信道的估计，包含信道状态信息的多个解调符号。 解码器被配置为对多个解调符号执行解码以产生相应的解码符号。

公开(公告)号：US08902798B2

公开(公告)日：2014-12-02

申请号：US14077624

申请日：2013-11-12

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rohit U Nabar ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

IPC: H04B7/00 ,  H04L1/00 ,  H04L27/26 ,  H04L27/00 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04L27/2649 ,  H04L1/0072 ,  H04L1/0079 ,  H04L5/0007 ,  H04L5/0092 ,  H04L25/0204 ,  H04L25/022 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2601 ,  H04L27/2602

Abstract: Systems and methods are provided for processing a payload portion of a received signal in a single carrier mode or a multiple carrier mode based on a portion of the received signal. A single carrier signaling portion is received at a first rate, and whether the payload portion of the signal is a single carrier signal or a multiple carrier signal is detected from the received single carrier signaling portion. The payload portion of the received signal is received at the first rate and demodulated in a single carrier mode if the detecting determines that the payload portion of the received signal is a single carrier signal, and the payload portion of the received signal is demodulated in a multiple carrier mode if the detecting determines that the payload portion of the received signal is a multiple carrier signal.

Abstract translation: 提供了系统和方法，用于基于接收信号的一部分，以单载波模式或多载波模式处理接收信号的有效载荷部分。 以第一速率接收单载波信令部分，以及信号的有效载荷部分是单载波信号还是从所接收的单载波信令部分检测多载波信号。 如果检测结果确定接收信号的有效载荷部分是单载波信号，则以第一速率接收接收信号的有效载荷部分并以单载波模式进行解调，并且接收信号的有效载荷部分被解调为 多载波模式，如果检测确定接收信号的有效载荷部分是多载波信号。

公开(公告)号：US08824610B1

公开(公告)日：2014-09-02

申请号：US13758410

申请日：2013-02-04

Applicant: Marvell International Ltd.

Inventor： Atul Salhotra ,  Kedar Shirali ,  Zhiyu Yang ,  Hui-Ling Lou

IPC: H04B7/10 ,  H04L1/02

CPC classification number: H04B7/0857 ,  H04B7/084 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A method for performing a clear channel assessment to determine whether a wireless channel is clear for transmission of a transmit signal. The method includes receiving, through the wireless channel, a plurality of signals, wherein the plurality of signals are respectively received via a plurality of antennas of the receiver determining a signal strength of each of the plurality of signals, autocorrelating the plurality of signals to respectively generate a plurality of autocorrelated signals, weighting each autocorrelated signal of the plurality of autocorrelated signals based on one or more of the signal strengths determined for each of the plurality of signals, combining each autocorrelated signal, as weighted, to generate a combined signal, demodulating the combined signal, and determining, based at least in part on the demodulation of the combined signal, whether the wireless channel is clear for the transmission of the transmit signal onto the wireless channel.

Abstract translation: 一种用于执行清除信道评估以确定无线信道是否清楚以发送发射信号的方法。 该方法包括：通过无线信道接收多个信号，其中分别经由接收机的多个天线接收多个信号，确定多个信号中的每一个的信号强度，分别将多个信号自相关 生成多个自相关信号，基于为每个多个信号确定的一个或多个信号强度对所述多个自相关信号中的每个自相关信号进行加权，将每个自相关信号合并为加权，以产生组合信号，解调 组合信号，以及至少部分地基于组合信号的解调来确定无线信道是否清楚地将发射信号传输到无线信道上。

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。