公开(公告)号：US08787483B1

公开(公告)日：2014-07-22

申请号：US13659709

申请日：2012-10-24

Applicant: Marvell International Ltd.

Inventor： Yakun Sun ,  Krishna Srikanth Gomadam ,  Jiwoong Choi ,  Raphael Cendrillon ,  Hui-Ling Lou ,  Yan Zhang

IPC: H04L1/02

CPC classification number: H04L1/0048 ,  H04B7/0413 ,  H04L1/06 ,  H04L25/03248 ,  H04L25/03891 ,  H04L27/0012

Abstract: In accordance with an embodiment, there is provided a method comprising receiving, at a receiver, a desired signal and an interfering signal, wherein the interfering signal was transmitted with a modulation unknown to the receiver; identifying a likely modulation corresponding to the modulation with which the interfering signal was transmitted; and decoding the desired signal using a modulation dependent multiple-input multiple output (MIMO) detection, wherein the modulation dependent MIMO detection is based at least in part on the identified likely modulation corresponding to the modulation with which the interfering signal was transmitted, wherein the modulation dependent MIMO detection includes maximum likelihood (ML) detection.

Abstract translation: 根据实施例，提供了一种方法，包括在接收机处接收期望信号和干扰信号，其中以接收机未知的调制方式发送干扰信号; 识别与所述干扰信号被发送的调制相对应的可能调制; 以及使用调制相关多输入多输出（MIMO）检测对所述期望信号进行解码，其中所述调制相关MIMO检测至少部分地基于与所述干扰信号被发送的调制相对应的所识别的可能调制，其中， 调制相关MIMO检测包括最大似然（ML）检测。

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。

公开(公告)号：US08675786B1

公开(公告)日：2014-03-18

申请号：US13888473

申请日：2013-05-07

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Kok-Wui Cheong

IPC: H04L27/06

CPC classification number: H04L1/0052 ,  H03M13/4107 ,  H03M13/6331 ,  H04L1/0054

Abstract: A system includes a channel estimator configured to receive a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols via a plurality of respective antennas, and generate estimates of a channel based on the plurality of OFDM symbols. A demodulator is configured to generate a plurality of demodulated symbols based on the plurality of OFDM symbols and the estimates of the channel. A decoder is configured to receive the estimates of the channel from the channel estimator, receive the plurality of demodulated symbols from the demodulator, and calculate decision metrics for the plurality of OFDM symbols using both the estimates of the channel and the plurality of demodulated symbols.

Abstract translation: 一种系统包括：信道估计器，被配置为经由多个相应天线接收多个正交频分复用（OFDM）符号，并且基于所述多个OFDM符号来生成信道的估计。 解调器被配置为基于多个OFDM符号和信道的估计来生成多个解调符号。 解码器被配置为从信道估计器接收信道的估计，从解调器接收多个解调符号，并且使用信道估计和多个解调符号来计算多个OFDM符号的判定度量。

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：US11190305B1

公开(公告)日：2021-11-30

申请号：US16194139

申请日：2018-11-16

Applicant: Marvell International Ltd.

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

IPC: H04L1/18 ,  H04L1/08 ,  H04B7/06

Abstract: Systems and methods are provided for introducing time diversity in a transmitter. The systems and methods may include receiving, at the transmitter, a request from a receiver to retransmit data. The systems and methods may further include receiving an input of data corresponding to the data requested for retransmission at a first transmitter block. The systems and methods may further include operating on the signals using the first transmitter block in at least one of a first mode and a second mode, such that an output of signals from the first transmitter block is dependent on a time-varying function and corresponds to the data requested by the receiver for retransmission.

公开(公告)号：US11044726B1

公开(公告)日：2021-06-22

申请号：US15867501

申请日：2018-01-10

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Xiayu Zheng ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04W72/04 ,  H04L5/00 ,  H04W84/12

Abstract: In a wireless communication network that operates according to a communication protocol that permits transmissions via multiple channels corresponding to multiple different frequency bandwidths, a communication device receives a packet via a first communication channel that spans a first frequency bandwidth. The communication device determines a second communication channel for transmitting an acknowledgment packet, the second communication channel spanning a second frequency bandwidth that is less than the first frequency bandwidth, the acknowledgment packet responsive to receiving the packet. The communication device transmits the acknowledgment packet via the second communication channel.

公开(公告)号：US10887837B1

公开(公告)日：2021-01-05

申请号：US16161961

申请日：2018-10-16

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04W52/02 ,  H04W48/16 ,  H04W76/11 ,  H04B17/318 ,  H04W80/02 ,  H04W84/12

Abstract: A method, performed by a first communication device, for transmitting a wireless local area network (WLAN) packet to a WLAN network interface device of a second communication device is described. The second communication device includes a separate wakeup radio (WUR) coupled to the WLAN network interface device. The WLAN packet is generated at the first communication device to include a WUR identifier associated with a neighbor communication device. The WUR identifier is usable by the WUR of the second communication device to identify WUR packets transmitted by the neighbor communication device. The neighbor communication device is different from the first communication device. The WLAN packet is transmitted by the first communication device to the WLAN network interface device of the second communication device.

公开(公告)号：US10524290B1

公开(公告)日：2019-12-31

申请号：US15337474

申请日：2016-10-28

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Lei Wang ,  Hongyuan Zhang ,  Jinjing Jiang ,  Hui-Ling Lou

IPC: H04B17/318 ,  H04W74/08 ,  H04L5/00 ,  H04W74/00 ,  H04W84/12

Abstract: A communication device performs a clear channel assessment (CCA) procedure to determine whether the communication device can transmit in a shared wireless communication medium, wherein the communication device is in a first basic service set (BSS) associated with a virtual access point (AP) implemented by a physical AP, and wherein the first BSS corresponds to a first BSS identifier. Performing the CCA procedure includes: for first signals having the first BSS identifier or having one or more second BSS identifiers corresponding to other virtual APs implemented by the physical AP, comparing energy of the signals to a first threshold; and for first signals determined by the communication device to have one or more third BSS identifiers, wherein the one or more third BSS identifiers correspond to other physical APs, comparing energy of the signals to a second threshold lower than the first threshold.

公开(公告)号：US10462790B1

公开(公告)日：2019-10-29

申请号：US15924573

申请日：2018-03-19

Applicant: Marvell International Ltd.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC: H04W72/04 ,  H04L5/00 ,  H04W84/12

Abstract: An access point (AP) device of a wireless local area network (WLAN) assigns a plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks to a plurality of client stations that are members of the WLAN. The AP device receives respective independent data for the plurality of client stations, and generates an orthogonal frequency division multiple access (OFDMA) data unit that includes a preamble and, for each sub-channel block in the plurality of OFDM sub-channel blocks: a respective legacy portion of the preamble that spans only the OFDM sub-channel block, the legacy portion including a respective legacy signal field that indicates a duration of the OFDMA data unit, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data for a respective client station, the respective independent data included within the OFDM sub-channel block.

公开(公告)号：US10404653B1

公开(公告)日：2019-09-03

申请号：US15945460

申请日：2018-04-04

Applicant: Marvell International Ltd.

Inventor： Liwen Chu ,  Hongyuan Zhang ,  Lei Wang ,  Jinjing Jiang ,  Hui-Ling Lou

IPC: H04L29/12 ,  H04W84/12

Abstract: A communication device of a first wireless network determines that a first value of a first basic service set (BSS) color identifier is the same as a value of a second BSS color identifier corresponding to a neighboring second wireless network. In response, the communication device determines a second value of the first BSS color identifier. The communication device transmits one or more packets that each include i) an indication that the first BSS color identifier is changing, ii) the second value of the first BSS color identifier, and iii) a respective integer number of remaining beacon intervals corresponding to a start time when the second value of the first BSS color identifier will supersede the first value of the first BSS color identifier. Based on the start time, the communication device begins to use the second value of the first BSS color identifier with communications in the first wireless network.