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1. 发明申请

WO2009099949A3 METHODS, TRANSMITTER AND RECEIVER FOR CHANNEL SOUNDING AND ESTIMATION FOR ANTENNA SELECTION IN MIMO SYSTEMS 审中-公开
公开(公告)号：WO2009099949A3
公开(公告)日：2009-08-13
申请号：PCT/US2009/032659
申请日：2009-01-30
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , LOC, Peter
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , LOC, Peter
IPC分类号： H04B7/08 , H04L27/26 , H04L25/02 , H04W52/42
摘要： Techniques and devices for antenna selection in a multiple-input-multiple- output (MIMO) system, in which communication is between a transmitter having a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a receiver having a second plurality of RF chains coupled to a second plurality of antennas, are provided. Techniques include receiving consecutive sounding packets each have a training symbol and that collectively sound a full-size channel for the MIMO system. A sub-channel estimate for each sounding packet can then be determined based on various factors, such as a known power level rule and gain factor. Scaling factors may be applied to each of these sub-channel estimates to produce a scaled sub-channel estimates.

2. 发明申请

WO2014201157A1 CHANNEL SOUNDING AND ESTIMATION STRATEGIES IN MIMO SYSTEMS 审中-公开
标题翻译： MIMO系统中的信道声音和估计策略
公开(公告)号：WO2014201157A1
公开(公告)日：2014-12-18
申请号：PCT/US2014/041976
申请日：2014-06-11
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , LOC, Peter
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , LOC, Peter
IPC分类号： H04L5/00 , H04L25/02
CPC分类号： H04L5/006 , H04L5/0023 , H04L25/0228
摘要： In a system having a first communication device with a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a second communication device with a second plurality of RF chains coupled to a second plurality of antennas, the second communication device receives consecutive training packets that were transmitted by the first communication device, the consecutive training packets having been produced at the first communication device by a power level rule to the first plurality of RF chains. The second communication device determines respective channel measurements corresponding to the consecutive training packets based on the power level rule, and selects a transmit parameter based on the respective channel measurements, the transmit parameter to be used by the first communication device when transmitting to the second communication device. The second communication device transmits and indication of the selected transmit parameter to the first communication device.
摘要翻译：在具有第一通信设备的系统中，第一通信设备具有耦合到第一多个天线的第一多个射频（RF）链和具有耦合到第二多个天线的第二多个RF链的第二通信设备，第二通信设备接收由第一通信设备发送的连续训练分组，已经通过功率电平规则在第一通信设备处产生的连续训练分组发送到第一多个RF链。第二通信设备基于功率电平规则来确定对应于连续训练分组的各个信道测量，并且基于相应的信道测量来选择发送参数，第一通信设备在发送到第二通信时要使用的发送参数设备。第二通信设备向所述第一通信设备发送所选择的发送参数的指示。

3. 发明申请

WO2014169110A1 METHOD AND APPARATUS OF MITIGATING INTERFERENCE IN A WIRELESS NETWORK THOUGH USE OF TRANSMIT BEAMFORMING 审中-公开
标题翻译：通过使用发射光束对无线网络干扰的方法和装置
公开(公告)号：WO2014169110A1
公开(公告)日：2014-10-16
申请号：PCT/US2014/033632
申请日：2014-04-10
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , LI, Pen, Chung
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , LI, Pen, Chung
IPC分类号： H04B7/04 , H04B7/06
CPC分类号： H04L25/03904 , H04B7/0413 , H04B7/0456 , H04B7/0626 , H04L25/0204 , H04L25/03942
摘要： In a method for reducing interference in wireless communications, a beamforming matrix is determined at a first communication device based on an estimate of a multiple input, multiple output (MIMO) communication channel between the first communication device and a second communication device. Both the first communication device and the second communication device belong to a first wireless network. Alternatively, the beamforming matrix may be generated based on the estimate of the MIMO communication channel and received at the first communication device. The beamforming matrix is used at the first communication device for the purpose of reducing interference to a second wireless network, where the interference is caused by the first communication device transmitting to the second communication device via the MIMO communication channel.
摘要翻译：在减少无线通信中的干扰的方法中，基于第一通信设备和第二通信设备之间的多输入多输出（MIMO）通信信道的估计，在第一通信设备处确定波束成形矩阵。第一通信设备和第二通信设备都属于第一无线网络。或者，波束形成矩阵可以基于MIMO通信信道的估计并在第一通信设备处接收来生成。在第一通信设备处使用波束成形矩阵，用于减少对第二无线网络的干扰，其中由第一通信设备经由MIMO通信信道向第二通信设备发送干扰。

4. 发明申请

WO2010005775A1 PHYSICAL LAYER FRAME FORMAT DESIGN FOR WIDEBAND WIRELESS COMMUNICATIONS SYSTEMS 审中-公开
标题翻译：物理层框架格式设计用于宽带无线通信系统
公开(公告)号：WO2010005775A1
公开(公告)日：2010-01-14
申请号：PCT/US2009/048245
申请日：2009-06-23
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , PALANIVELU, Arul Durai, Murugan , LOU, Hui-Ling , WU, Songping
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , PALANIVELU, Arul Durai, Murugan , LOU, Hui-Ling , WU, Songping
IPC分类号： H04L5/02 , H04L25/02 , H04L27/26 , H04L27/36 , H04L27/38
CPC分类号： H04L27/2601 , H04L5/02 , H04L25/02 , H04L27/36 , H04L27/38
摘要： 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.
摘要翻译：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。

5. 发明申请

WO2009139989A1 PHY PREAMBLE FORMAT FOR WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译： PHY无线通信系统的前缀格式
公开(公告)号：WO2009139989A1
公开(公告)日：2009-11-19
申请号：PCT/US2009/039724
申请日：2009-04-07
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , WU, Songping
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , WU, Songping
IPC分类号： H04B1/707 , H04L27/26
CPC分类号： H04W56/001 , H04B1/7073 , H04B1/70735 , H04B2201/7073 , H04J13/0014 , H04J13/10 , H04L5/0016 , H04L27/2613 , H04L27/262 , H04L27/2656 , H04L27/2662 , H04W56/00
摘要： A system and method of extracting data from data packets transmitted over a wireless network includes receiving a data packet having a preamble portion and a payload portion. The preamble portion is cross correlated with a first known spreading sequence to generate a first timing signal and the preamble portion is cross correlated with a second known spreading signal to generate a frame timing signal. An impulse is detected in the first timing signal and a first timing parameter is set based upon the detected impulse in the first timing signal. An impulse is detected in the frame timing signal and a frame timing parameter is set based upon the detected impulse in the frame timing signal. Data is extracted from the received payload portion according to the first timing parameter and the frame timing parameter.
摘要翻译：从通过无线网络发送的数据分组中提取数据的系统和方法包括：接收具有前同步码部分和有效载荷部分的数据分组。前导码部分与第一已知扩展序列交叉相关，以产生第一定时信号，并且前同步码部分与第二已知扩展信号交叉相关，以产生帧定时信号。在第一定时信号中检测到脉冲，并且基于第一定时信号中检测到的脉冲设置第一定时参数。在帧定时信号中检测到脉冲，并且基于帧定时信号中检测到的脉冲设置帧定时参数。根据第一定时参数和帧定时参数从接收到的有效载荷部分提取数据。

6. 发明申请

WO2009051748A2 BEAMFORMING USING PREDEFINED SPATIAL MAPPING MATRICES 审中-公开
标题翻译：使用预定的空间映射矩阵进行波束形成
公开(公告)号：WO2009051748A2
公开(公告)日：2009-04-23
申请号：PCT/US2008/011805
申请日：2008-10-15
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U.
发明人： ZHANG, Hongyuan , NABAR, Rohit, U.
IPC分类号： H04L1/00
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0617 , H04B7/0626 , H04B7/0632 , H04L1/0001
摘要： Systems and methods for transmitting packets to a receiver. In an implementation, the method includes storing, in a memory, a plurality of predefined spatial mapping matrices for use in a transmission of one or more packets to a receiver; sequentially transmitting one or more packets to the receiver, in which each of the sequential transmissions of one or more packets comprises using a different one of the plurality of predefined spatial mapping matrices stored in the memory; and selecting one of the plurality of predefined spatial mapping matrices stored in the memory for use in a subsequent transmission of one or more packets to the receiver, in which the selection of the one of the plurality of predefined spatial mapping matrices for use in the subsequent transmission is based on a quality of reception of the one or more data packets transmitted in each of the sequential transmissions.
摘要翻译：用于将数据包发送到接收器的系统和方法。在实现中，该方法包括在存储器中存储多个预定义的空间映射矩阵，用于将一个或多个分组传输到接收机; 顺序地将一个或多个分组发送到接收机，其中一个或多个分组的顺序传输中的每一个包括使用存储在存储器中的多个预定空间映射矩阵中的不同的一个; 以及选择存储在所述存储器中的所述多个预定义的空间映射矩阵中的一个，用于将一个或多个分组的后续传输用于所述接收机，其中所述多个预定空间映射矩阵中的所述一个的选择用于随后的传输基于在每个顺序传输中发送的一个或多个数据分组的接收质量。

7. 发明申请

WO2009012448A2 WIRELESS NETWORK WITH SIMULTANEOUS UPLINK TRANSMISSION OF INDEPENDENT DATA FROM MULTIPLE CLIENT STATIONS 审中-公开
标题翻译：无线网络同时通过上行传输多客户站的独立数据
公开(公告)号：WO2009012448A2
公开(公告)日：2009-01-22
申请号：PCT/US2008/070469
申请日：2008-07-18
申请人： MARVELL WORLD TRADE LTD. , NABAR, Rohit U. , ZHANG, Hongyuan , LOU, Hui-ling
发明人： NABAR, Rohit U. , ZHANG, Hongyuan , LOU, Hui-ling
CPC分类号： H04L5/0055 , H04B7/2618 , H04L5/0005 , H04W52/04 , H04W72/042 , H04W72/0446 , H04W88/08
摘要： A wireless network comprises R client stations that respectively generate simultaneous uplink transmission (SUT) data, where R is an integer greater than one. An access point (AP) receives SUT data from each of the R client stations during an SUT period.
摘要翻译：无线网络包括分别产生同时上行链路传输（SUT）数据的R个客户站，其中R是大于1的整数。接入点（AP）在SUT期间接收来自每个R客户端站的SUT数据。

8. 发明申请

WO2011159800A1 ALTERNATE FEEDBACK TYPES FOR DOWNLINK MULTIPLE USER MIMO CONFIGURATIONS 审中-公开
标题翻译：用于下行链路多用户MIMO配置的备用反馈类型
公开(公告)号：WO2011159800A1
公开(公告)日：2011-12-22
申请号：PCT/US2011/040527
申请日：2011-06-15
申请人： MARVELL WORLD TRADE LTD. , SRINIVASA, Sudhir , ZHANG, Hongyuan , NABAR, Rohit, U. , KWON, Hyukjoon
发明人： SRINIVASA, Sudhir , ZHANG, Hongyuan , NABAR, Rohit, U. , KWON, Hyukjoon
IPC分类号： H04B7/06 , H04B7/04
CPC分类号： H04W72/0406 , H04B7/0434 , H04B7/0452 , H04B7/0617 , H04B7/0634 , H04L25/0204 , H04L25/0228 , H04L25/0242 , H04W48/16 , H04W72/046 , H04W72/082
摘要： A method in a communication network includes obtaining descriptions of a plurality of communication channels each communication channel associated with a different one of a plurality of receivers; and generating a plurality of steering vectors, one for each of the plurality of receivers, using the descriptions of the plurality of communication channels; wherein each steering vector is used to transmit data to a corresponding one of the plurality receivers via a plurality of antennas and over a corresponding one of the communication channels simultaneously and wherein each steering vector is used to communicate data on a different one of the plurality of communication channels, and wherein each steering vector is generated to reduce interference on a corresponding communication channel caused by simultaneous transmission of data on other communication channels.
摘要翻译：通信网络中的方法包括：获得与多个接收机中的不同的一个相关联的每个通信信道的多个通信信道的描述; 以及使用所述多个通信信道的描述来生成多个所述多个接收机中的每一个的导向向量; 其中每个导向矢量用于经由多个天线以及通过相应的一个通信信道同时向多个接收机中的相应一个发送数据，并且其中每个导向向量用于在多个接收机中的不同的一个上传送数据通信信道，并且其中生成每个导向矢量以减少由在其他通信信道上的数据的同时发送而引起的相应通信信道上的干扰。

9. 发明申请

WO2010027864A3 PHYSICAL LAYER DATA UNIT FORMAT 审中-公开
公开(公告)号：WO2010027864A3
公开(公告)日：2010-03-11
申请号：PCT/US2009/055069
申请日：2009-08-26
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , SHEN, Manyuan , WU, Songping , LOU, Hui-ling , LIU, Yong
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , SHEN, Manyuan , WU, Songping , LOU, Hui-ling , LIU, Yong
IPC分类号： H04L27/26
摘要： In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.

10. 发明申请

WO2009140605A1 EFFICIENT PHYSICAL LAYER PREAMBLE FORMAT 审中-公开
标题翻译：有效的物理层前置格式
公开(公告)号：WO2009140605A1
公开(公告)日：2009-11-19
申请号：PCT/US2009/044160
申请日：2009-05-15
申请人： MARVELL WORLD TRADE LTD. , ZHANG, Hongyuan , NABAR, Rohit, U. , WU, Songping , LOU, Hui-Ling , ZHOU, Quan
发明人： ZHANG, Hongyuan , NABAR, Rohit, U. , WU, Songping , LOU, Hui-Ling , ZHOU, Quan
IPC分类号： H04J11/00 , H04L27/26
CPC分类号： H04B1/707 , H04J13/0014 , H04J13/10 , H04L27/2613 , H04L27/262
摘要： A method for generating a preamble of a data unit for transmission via a communication channel includes generating a first field of the preamble using one of a first sequence or a second sequence, such that the first sequence and the second sequence are complementary sequences such that a sum of out-of-phase aperiodic autocorrelation coefficients of the first sequence and the second sequence is zero; generating, using the other one of the first sequence or the second sequence, an indicator of a start of a second field of the preamble, the second field associated with channel estimation information, such that the indicator of the start of the second field immediately follows the first field; and generating the second field of the preamble.
摘要翻译：一种用于生成用于经由通信信道进行传输的数据单元的前同步码的方法包括使用第一序列或第二序列中的一个生成前导码的第一字段，使得第一序列和第二序列是互补序列，使得第一序列和第二序列的异相非周期自相关系数的和为零; 使用所述第一序列或所述第二序列中的另一个序列生成所述前导码的第二字段的开始的指示符，所述第二字段与信道估计信息相关联，使得所述第二字段的开始的指示符紧随其后第一场; 以及产生所述前导码的第二字段。

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