公开(公告)号：US08982849B1

公开(公告)日：2015-03-17

申请号：US13713813

申请日：2012-12-13

Applicant: Marvell International Ltd.

Inventor： Atul Salhotra ,  Ping Gao ,  Bo Wang

IPC: H04W4/00 ,  H04W72/04

CPC classification number: H04W72/0453 ,  H04W72/00 ,  H04W74/0816 ,  H04W84/12 ,  H04W88/08

Abstract: A wireless network device comprising a physical layer (PHY) module and a media access control (MAC) module. The PHY module is configured to communicate with an 80 MHz channel. The 80 MHz channel includes a plurality of sub-bands including a first sub-band, a second sub-band, a third sub-band, and a fourth sub-band. One of the plurality of sub-bands corresponds to a primary channel. The PHY module is further configured to determine which of the plurality of sub-bands are receiving a data packet, and generate at least one clear channel assessment signal indicating which of the plurality of sub-bands are receiving the data packet. The MAC module is configured to receive the at least one clear channel assessment signal from the PHY module, and selectively transmit on the primary channel based on the at least one clear channel assessment signal.

Abstract translation: 一种包括物理层（PHY）模块和媒体访问控制（MAC）模块的无线网络设备。 PHY模块被配置为与80MHz信道进行通信。 80MHz信道包括包括第一子带，第二子带，第三子带和第四子带的多个子带。 多个子带中的一个对应于主信道。 PHY模块还被配置为确定多个子带中的哪一个正在接收数据分组，并且生成指示多个子带中的哪一个正在接收数据分组的至少一个清除信道评估信号。 MAC模块被配置为从PHY模块接收至少一个清除信道评估信号，并且基于所述至少一个清除信道评估信号在主信道上选择性地发送。

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：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：US09215049B1

公开(公告)日：2015-12-15

申请号：US14664601

申请日：2015-03-20

Applicant: Marvell International Ltd.

Inventor： Hui-Ling Lou ,  Bhaskar Nallapureddy ,  Atul Salhotra

IPC: H04L5/00 ,  H04L27/26

CPC classification number: H04L5/0023 ,  H04B1/38 ,  H04B7/068 ,  H04L1/0071 ,  H04L5/0044 ,  H04L27/2637 ,  H04W72/04

Abstract: Systems and techniques relating to processing multiple data streams include, according to at least one implementation, an apparatus including a parser for a MIMO mode; an interleaver section coupled with the parser, configured to perform separate interleaving of bit streams during the MIMO mode, wherein a first portion of the interleaver section that handles a first of the two or more second bit streams employs a same interleaver operation as during a SISO mode of transmission; a subcarrier mapping section configured to perform separate mapping of subcarriers during the MIMO mode; and a transmit back end coupled with the subcarrier mapping section to connect with multiple antennas, the transmit back end configured to apply different rotations to dynamically changed second, third, and fourth ones of the two or more second bit streams transmitted over the multiple antennas during the MIMO mode to improve transmission robustness and transmission data rate.

Abstract translation: 根据至少一个实现，涉及处理多个数据流的系统和技术包括：包括用于MIMO模式的解析器的装置; 与所述解析器耦合的交织器部分，被配置为在所述MIMO模式期间执行比特流的单独交织，其中处理所述两个或更多个第二比特流中的第一比特流的交织器部分的第一部分采用与SISO期间相同的交织器操作 传输方式; 子载波映射部分，被配置为在MIMO模式期间执行子载波的分离映射; 以及与所述子载波映射部分耦合以与多个天线连接的发射后端，所述发射后端被配置为将不同的旋转应用于在所述多个天线上发射的所述两个或更多个第二比特流中的动态改变的第二，第三和第四比特流 MIMO模式提高传输鲁棒性和传输数据速率。