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    Midamble for WLAN PHY packets
    11.
    发明授权
    Midamble for WLAN PHY packets 有权

    公开(公告)号：US10368391B1

    公开(公告)日：2019-07-30

    申请号：US16120393

    申请日：2018-09-03

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

    IPC: H04W84/12 ,  H04J11/00 ,  H04L27/26

    Abstract: A communication device generates a physical layer (PHY) data unit that includes a PHY preamble and one or more PHY midambles. The communication generates the PHY preamble of the PHY data unit to include i) a signal field having a subfield that indicates that the PHY data unit includes one or more PHY midambles, ii) a short training field (STF) for automatic gain control (AGC) training and synchronization at a receiver, and iii) one or more long training fields (LTFs) for determining a channel estimate at the receiver. The communication generates a data payload of the PHY data unit having i) a set of orthogonal frequency division multiplexing (OFDM) symbols, and ii) one or more PHY midambles. Each of the one or more PHY midambles includes one or more LTFs for determining an updated channel estimate. The communication device transmits the PHY data unit via a wireless communication channel.

    Long wireless local area network (WLAN) packets with midambles
    12.
    发明授权
    Long wireless local area network (WLAN) packets with midambles 有权
    长时间的无线局域网（WLAN）数据包

    公开(公告)号：US09351333B1

    公开(公告)日：2016-05-24

    申请号：US13689244

    申请日：2012-11-29

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Raja Banerjea ,  Yong Liu

    IPC: H04W84/12 ,  H04L12/28

    CPC classification number: H04W84/12 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2602 ,  H04L27/261 ,  H04W28/065

    Abstract: A preamble, a plurality of data segments of a data payload of a single data unit, and one or more midambles, each included between respective data segments, are generated. Data to be included in the data segments is processed, including at least one of: encoding all data payload bits of all segments as a whole, encoding data payload bits on a per segment basis, scrambling all data payload bits of all segments as a whole, scrambling data payload bits on a per segment basis, adding padding bits to only a last data segment, or adding padding bits to each data segment separately. The single data unit, including the preamble, the plurality of data segments and the one or more midambles, is caused to be transmitted. A network interface of a communication device may perform the generation and the data processing, and may cause the transmission of the single data unit.

    Abstract translation: 产生前导码，单个数据单元的数据有效载荷的多个数据段，以及各个数据段之间的一个或多个中间码块。 包括在数据段中的数据被处理，包括以下至少之一：整体地编码所有段的所有数据有效载荷比特，对每个段进行编码数据有效负载比特，将整个段的所有数据有效载荷位加扰 ，在每个片段的基础上加扰数据有效载荷比特，将填充比特添加到最后一个数据段，或者分别向每个数据段添加填充比特。 导致包括前导码，多个数据段和一个或多个中间码的单个数据单元被发送。 通信设备的网络接口可以执行生成和数据处理，并且可以导致单个数据单元的传输。

    Simultaneous uplink transmission in a wireless network
    13.
    发明授权
    Simultaneous uplink transmission in a wireless network 有权
    在无线网络中同时进行上行链路传输

    公开(公告)号：US09237538B1

    公开(公告)日：2016-01-12

    申请号：US14065175

    申请日：2013-10-28

    Applicant: MARVELL INTERNATIONAL LTD.

    Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Sudhir Srinivasa

    IPC: H04W4/00 ,  H04W56/00 ,  H04L29/10 ,  H04L5/00 ,  H04L27/26

    CPC classification number: H04W56/0005 ,  H04B7/0413 ,  H04L1/0004 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/261 ,  H04L29/10 ,  H04W28/18 ,  H04W72/1278 ,  H04W72/1289 ,  H04W84/12

    Abstract: A synchronization data unit is generated by an access point. The synchronization data unit (i) is for scheduling subsequent simultaneous transmission of a plurality of data units by communication devices, and (ii) specifies respective sets of spatial streams that respective communication devices are to use when transmitting respective data units. A signal is received via a plurality of antennas of the access point, where the signal corresponds to the plurality of data units transmitted simultaneously from the respective communication devices via the respective sets of sets of spatial streams. An estimate of the MIMO communication channel is determined using a plurality of training fields included in a first portion of the signal, and data in a second portion of the signal is decoded using the estimate of the MIMO communication channel.

    Abstract translation: 接入点产生同步数据单元。 同步数据单元（i）用于通过通信设备调度后续的多个数据单元的同时发送，并且（ii）指定各个通信设备在发送各个数据单元时要使用的各组空间流。 经由接入点的多个天线接收信号，其中该信号对应于通过相应的一组空间流从各个通信设备同时发送的多个数据单元。 使用包括在信号的第一部分中的多个训练场来确定MIMO通信信道的估计，并且使用MIMO通信信道的估计来对信号的第二部分中的数据进行解码。

    Viterbi architecture for BDR/BLE
    17.
    发明授权
    Viterbi architecture for BDR/BLE 有权
    维特比BDR / BLE架构

    公开(公告)号：US08959419B1

    公开(公告)日：2015-02-17

    申请号：US13719810

    申请日：2012-12-19

    Applicant: Marvell International Ltd.

    Inventor： Ankit Sethi ,  Swaroop Venkatesh ,  Rohit U. Nabar ,  Vijay Ahirwar

    IPC: H03M13/03 ,  H04L1/00

    CPC classification number: H04L1/0054 ,  H03M13/41 ,  H03M13/4107

    Abstract: A Viterbi decoder module includes a branch metric module configured to calculate branch metrics corresponding to a continuous phase modulated signal. Each of the branch metrics corresponds to a respective path between stages of the Viterbi decoder module. A path metric module is configured to calculate a first cost metric associated with the first state of the next stage based on the first branch metric and the second branch metric, and calculate a second cost metric associated with the second state of the next stage based on the third branch metric and the fourth branch metric. A traceback module is configured to determine a maximum likelihood path between stages of the Viterbi decoder based on the first cost metric and the second cost metric. The Viterbi decoder module is configured to output decoded data based on the maximum likelihood path.

    Abstract translation: 维特比解码器模块包括被配置为计算与连续相位调制信号相对应的分支度量的分支度量模块。 每个分支量度对应于维特比解码器模块的级之间的相应路径。 路径度量模块被配置为基于第一分支度量和第二分支量度来计算与下一级的第一状态相关联的第一成本度量，并且基于与第二成本度量相关联的第二成本度量，基于 第三分支度量和第四分支度量。 回溯模块被配置为基于第一成本度量和第二成本度量来确定维特比解码器的级之间的最大似然路径。 维特比解码器模块被配置为基于最大似然路径输出解码数据。

    Narrow-band OFDM mode for WLAN
    18.
    发明授权
    Narrow-band OFDM mode for WLAN 有权
    用于WLAN的窄带OFDM模式

    公开(公告)号：US08917795B1

    公开(公告)日：2014-12-23

    申请号：US13769134

    申请日：2013-02-15

    Applicant: Marvell International Ltd.

    Inventor： Hongyuan Zhang ,  Sudhir Srinivasa ,  Rohit U. Nabar ,  Raja Banerjea

    IPC: H04L27/00 ,  H04L27/26

    CPC classification number: H04L27/2627 ,  H04J3/0697 ,  H04L27/2626 ,  H04L27/2657 ,  H04L27/2675

    Abstract: Systems and techniques relating to wireless communications are described. A described system includes circuitry configured to generate, in accordance with a clock signal, a first baseband signal for transmission over a wireless channel, one or more first preamble symbols of the first baseband signal are based on a pre-determined preamble sequence when a first clock frequency is used in the clock signal. The described system includes circuitry configured to generate, in accordance with the clock signal, a second baseband signal for transmission over the wireless channel, one or more second preamble symbols of the second baseband signal are based on the pre-determined preamble sequence, the one or more second preamble symbols have a longer duration than the one or more first preamble symbols when a second clock frequency is used in the clock signal. The second clock frequency is lower than the first clock frequency and is used to extend a wireless communication range of the wireless channel.

    Abstract translation: 描述与无线通信相关的系统和技术。 所描述的系统包括经配置以根据时钟信号产生用于通过无线信道传输的第一基带信号的电路，当第一基带信号的第一 在时钟信号中使用时钟频率。 所描述的系统包括被配置为根据时钟信号产生用于通过无线信道传输的第二基带信号的电路，第二基带信号的一个或多个第二前导码符号基于预定的前导码序列，一个 或更多的第二前导码符号在时钟信号中使用第二时钟频率时具有比一个或多个第一前导码符号更长的持续时间。 第二时钟频率低于第一时钟频率，并用于扩展无线信道的无线通信范围。

    Equal power output spatial spreading matrix for use in a wireless MIMO communication system
    19.
    发明授权
    Equal power output spatial spreading matrix for use in a wireless MIMO communication system 有权
    用于无线MIMO通信系统的等功率输出空间扩展矩阵

    公开(公告)号：US08767863B1

    公开(公告)日：2014-07-01

    申请号：US13932862

    申请日：2013-07-01

    Applicant: Marvell International Ltd.

    Inventor： Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Kedar Shirali ,  Rohit U. Nabar ,  Atul Salhotra

    IPC: H04B7/02 ,  H04B1/40

    CPC classification number: H04B7/0678 ,  H04L1/06

    Abstract: A transceiver utilizes a spatial spreading matrix to distribute two or more encoded spatial data streams to multiple antennas. The spatial spreading matrix satisfies one or more of the following two constraints: (a) the ratio of squared norms of the sum of the components of a row, for different rows of the spatial spreading matrix, is equal to a first constant sequence, and (b) the ratio of squared norms of the sum of a symbol Sl to be transmitted, when the symbol Sl is equal to 1 or −1, multiplied by each of the components of a row, for different rows of the spatial spreading matrix, is equal to a second constant sequence.

    Abstract translation: 收发器利用空间扩展矩阵将两个或多个编码空间数据流分配到多个天线。 空间扩展矩阵满足以下两个约束中的一个或多个：（a）对于空间扩展矩阵的不同行，行的分量之和的平方的比率等于第一常数序列，并且 （b）对于空间扩展矩阵的不同行，当符号S1等于1或-1时，要发送的符号S1的和的平方范数与行的每个分量相乘， 等于第二个常数序列。

    Phase-adjusted channel estimation for frequency division multiplexed channels
    20.
    发明授权
    Phase-adjusted channel estimation for frequency division multiplexed channels 有权
    用于频分复用信道的相位调整信道估计

    公开(公告)号：US08611476B1

    公开(公告)日：2013-12-17

    申请号：US13706164

    申请日：2012-12-05

    Applicant: Marvell International Ltd.

    Inventor： Rohit U. Nabar ,  Kedar Shirali

    IPC: H04L27/06

    CPC classification number: H04L25/0206 ,  H04L25/022 ,  H04L25/0224

    Abstract: A method and apparatus for estimating a frequency response of a channel. The method includes adjusting phase components of estimates of the frequency response to provide phase-adjusted estimates; performing a smoothing operation on the phase-adjusted estimates to provide smoothed phase-adjusted estimates; and generating an output of a reverse phase adjustment, wherein the reverse phase adjustment is performed on the smoothed phase-adjusted estimates.

    Abstract translation: 一种用于估计频道的频率响应的方法和装置。 该方法包括调整频率响应的估计的相位分量以提供相位调整的估计; 对经过调整后的估计进行平滑运算，以提供平滑的相位调整估计; 并产生反向相位调整的输出，其中对平滑的相位调整的估计执行反向相位调整。

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