公开(公告)号：US09699741B1

公开(公告)日：2017-07-04

申请号：US14687442

申请日：2015-04-15

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Lei Wang ,  Hui-Ling Lou ,  Hongyuan Zhang ,  Yakun Sun

IPC: H04W52/24 ,  H04W74/00 ,  H04W84/12 ,  H04W88/08

CPC classification number: H04W52/243 ,  H04W52/143 ,  H04W52/367 ,  H04W52/40 ,  H04W74/002 ,  H04W84/12 ,  H04W88/08

Abstract: A wireless communication system includes a first access point, and at least one first station in communication with the first access point. The first access point controls access parameters for communications with a first station. The access parameters may include Enhanced Distributed Channel Access parameters such as a minimum or maximum contention window parameter, an arbitration interframe spacing parameter, or a transmit opportunity limit parameter. The access parameters also may include a channel bandwidth parameter, a transmit power parameter, or a data rate parameter such as a modulation and coding scheme parameter. Where the system includes an additional access point, and at least one additional station in communication with the additional access point, the first access point and the additional access point control access parameters to avoid interference between the first access point and the additional access point. A central controller may coordinate between the first and additional access points.

公开(公告)号：US09692559B1

公开(公告)日：2017-06-27

申请号：US15052421

申请日：2016-02-24

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rui Cao

IPC: H04L1/06 ,  H04L5/00 ,  H04B7/04 ,  H04L1/00

CPC classification number: H04L1/0643 ,  H04B7/0413 ,  H04B7/0669 ,  H04L1/0057 ,  H04L1/0625 ,  H04L5/0023 ,  H04L27/2602

Abstract: Systems and methods described herein provide a system for transmitting data on an MIMO channel using a STBC. The system comprises a wireless transmitter. The wireless transmitter obtains plurality of data symbols to transmit, and performs data padding for the plurality of data symbols based on a non-STBC manner. The wireless transmitter further calculates a number of bits per data symbol after the data padding and pre-codes a data symbol from the plurality of data symbols based on available channel information when the number of data symbols is an odd number. The wireless transmitter generates an STBC based on the pre-coded data symbols, and transmits the generated STBC to the MIMO channel.

公开(公告)号：US09628260B1

公开(公告)日：2017-04-18

申请号：US14543103

申请日：2014-11-17

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04B1/707 ,  H04L7/00 ,  H04W56/00

CPC classification number: H04L7/0091 ,  H04B1/7073 ,  H04B7/0617 ,  H04L5/0007 ,  H04L25/0226 ,  H04W56/00

Abstract: In a wireless communication system where communication devices exchange information utilizing physical layer (PHY) data units that conform to a first format, where the first format includes a short training field (STF) that includes exactly N repetitions of a spreading sequence, a method for generating a PHY data unit that conforms to a second format, where the second format has a longer STF than the first format, includes generating an STF of the PHY data unit that includes M instances of the spreading sequence, where M is greater than N, and generating a channel estimation field (CEF).

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：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。

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。

公开(公告)号：US09166828B1

公开(公告)日：2015-10-20

申请号：US14107904

申请日：2013-12-16

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Rohit U. Nabar ,  Hongyuan Zhang

IPC: H04B17/336 ,  H04L25/02

CPC classification number: H04L25/0204 ,  H04B1/0475 ,  H04B1/1027 ,  H04B7/0865 ,  H04B15/04 ,  H04B15/06 ,  H04B17/345 ,  H04L5/0023 ,  H04L25/022 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/3809

Abstract: A method for estimating and compensating for noise on antennas of a multi-antenna wireless system. The method includes receiving multiple signals via multiple receive antennas of a receiver, where each of the signals is received via a respective antenna. The method further includes estimating noise power imbalance corresponding to the receive antennas based on the multiple signals.

Abstract translation: 一种用于估计和补偿多天线无线系统的天线上的噪声的方法。 该方法包括经由接收机的多个接收天线接收多个信号，其中每个信号经由相应的天线接收。 该方法还包括基于多个信号估计与接收天线相对应的噪声功率不平衡。

公开(公告)号：US09161362B1

公开(公告)日：2015-10-13

申请号：US13925596

申请日：2013-06-24

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Raja Banerjea ,  Hongyuan Zhang

IPC: H04W52/02 ,  H04W72/00 ,  H04W80/04 ,  H04W88/06 ,  H04W28/04 ,  H04W72/04

CPC classification number: H04W72/0473 ,  H04B7/0697

Abstract: An access point device selects a group of two or more transceivers from a plurality of transceivers for simultaneous transmission of respective data to the access point device. The group of transceivers is selected so that respective power levels of signals received, at the access point device, from any two transceivers in the group of transceivers differ by no more than a predetermined amount. An indication of assignment to the group of transceivers is transmitted to each transceiver in the group of transceivers. The access point device receives the respective data from each transceiver in the group of transceivers simultaneously via a shared wireless communication channel.

Abstract translation: 接入点设备从多个收发器中选择一组两个或多个收发器，用于将相应数据同时发送到接入点设备。 选择收发机组，使得在接入点设备处从收发机组中的任何两个收发器接收的信号的相应功率电平相差不超过预定量。 收发器组中的每个收发器发送对该组收发器的分配的指示。 接入点设备经由共享无线通信信道同时从收发器组中的每个收发机接收相应的数据。

公开(公告)号：US09002305B1

公开(公告)日：2015-04-07

申请号：US14251966

申请日：2014-04-14

Applicant: Marvell International Ltd.

Inventor： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu

IPC: H04B1/18 ,  H04L25/02 ,  H04W72/08

CPC classification number: H04L25/0228 ,  H04B7/0413 ,  H04L5/0023 ,  H04L25/0204 ,  H04W72/085

Abstract: A plurality of training signal sets are transmitted. Each training signal set includes information sufficient to determine a channel estimate corresponding to a communication channel from a first station to a second station. A refined channel estimate is determined based on reception of the plurality of training signal sets.

Abstract translation: 发送多个训练信号组。 每个训练信号组包括足以确定对应于从第一站到第二站的通信信道的信道估计的信息。 基于多个训练信号组的接收来确定精细信道估计。

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。