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41. 发明授权

US08941538B1 Iterative technique for fast computation of TxBF steering weights 有权
标题翻译：用于快速计算TxBF转向重量的迭代技术
公开(公告)号：US08941538B1
公开(公告)日：2015-01-27
申请号：US13463859
申请日：2012-05-04
申请人： Rohit U. Nabar , Hongyuan Zhang , Sudhir Srinivasa
发明人： Rohit U. Nabar , Hongyuan Zhang , Sudhir Srinivasa
IPC分类号： H01Q3/00 , H04B7/06
CPC分类号： H01Q3/00 , H04B7/0617 , H04B7/0626 , H04B7/0634
摘要： Systems and methods are provided for directing radiated energy from a transmitting device towards a receiving device using multiple antennas. Channel weights, representing signal attenuation and a phase rotation induced by a transmission medium, are determined at a transmitting device. A set of steering weights are determined based on applying an iterative linear transform to an initial value of the steering weights, where the linear transform depends on the determined channel weights. A final value of the steering weights is applied to an input signal to produce a transmit signal, and the transmit signal is transmitted using multiple antennas.
摘要翻译：提供了系统和方法，用于使用多个天线将辐射能量从发射设备引导到接收设备。在发送设备处确定表示信号衰减和由传输介质引起的相位旋转的信道权重。基于将迭代线性变换应用于转向权重的初始值来确定一组转向权重，其中线性变换取决于确定的信道权重。将转向权重的最终值应用于输入信号以产生发送信号，并且使用多个天线发送发送信号。

42. 发明授权

US08891640B2 Uplink training for MIMO implicit beamforming 有权
标题翻译：用于MIMO隐式波束成形的上行链路训练
公开(公告)号：US08891640B2
公开(公告)日：2014-11-18
申请号：US13491541
申请日：2012-06-07
申请人： Rohit U. Nabar , Hongyuan Zhang , Sudhir Srinivasa , Xiayu Zheng
发明人： Rohit U. Nabar , Hongyuan Zhang , Sudhir Srinivasa , Xiayu Zheng
IPC分类号： H04K1/10 , H04L27/28 , H04B7/06
CPC分类号： H04B7/0417 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0634
摘要： In a method for beamforming in a multiple input multiple output (MIMO) communication system, a data unit is received from a communication device via a MIMO communication channel, and it is determined whether the data unit satisfies one or more selection criteria. Further, when it is determined that the data unit satisfies the one or more selection criteria, the data unit is selected to be used in developing a steering matrix for transmitting data units to the communication device.
摘要翻译：在多输入多输出（MIMO）通信系统中的波束形成方法中，经由MIMO通信信道从通信设备接收数据单元，并且确定数据单元是否满足一个或多个选择标准。此外，当确定数据单元满足一个或多个选择标准时，数据单元被选择用于开发用于向通信设备发送数据单元的导向矩阵。

43. 发明授权

US08826106B2 Low bandwidth PHY for WLAN 有权
标题翻译： WLAN的低带宽PHY
公开(公告)号：US08826106B2
公开(公告)日：2014-09-02
申请号：US13494505
申请日：2012-06-12
申请人： Hongyuan Zhang , Raja Banerjea , Sudhir Srinivasa
发明人： Hongyuan Zhang , Raja Banerjea , Sudhir Srinivasa
IPC分类号： G06F11/00 , H03M13/00 , H04L1/00 , H04L7/04
CPC分类号： H04L1/004 , H04L1/0025 , H04L1/0043 , H04L1/0057 , H04L1/0061 , H04L1/08 , H04L7/048 , H04L27/2602 , H04L27/2613
摘要： A method includes generating first and second data units corresponding to first and second PHY modes, respectively. Generating the first data unit includes FEC encoding first information bits, mapping the FEC-encoded bits to first constellation symbols, and generating first OFDM symbols to include the first constellation symbols. The first OFDM symbols utilize a first tone spacing, and include a first number of non-zero tones collectively spanning a first bandwidth. Generating the second data unit includes FEC encoding second information bits, block encoding the FEC-encoded bits, mapping the block-encoded bits to second constellation symbols, and generating second OFDM symbols to include the second constellation symbols. The second OFDM symbols utilize the first tone spacing, and include a second number of non-zero tones collectively spanning a second bandwidth less than the first bandwidth. The second number of non-zero tones is less than the first number of non-zero tones.
摘要翻译：一种方法包括分别产生对应于第一和第二PHY模式的第一和第二数据单元。生成第一数据单元包括FEC编码第一信息比特，将FEC编码比特映射到第一星座符号，以及生成第一OFDM符号以包括第一星座符号。第一OFDM符号利用第一音调间隔，并且包括共同跨越第一带宽的第一数量的非零音调。生成第二数据单元包括FEC编码第二信息比特，对FEC编码比特进行块编码，将块编码比特映射到第二星座符号，以及生成第二OFDM符号以包括第二星座符号。第二OFDM符号利用第一音调间隔，并且包括共同跨越小于第一带宽的第二带宽的第二数量的非零音调。第二数量的非零音调小于第一个非零音调数。

44. 发明申请

US20140126659A1 PARSING AND ENCODING METHODS IN A COMMUNICATION SYSTEM 有权
标题翻译：通信系统中的分离和编码方法
公开(公告)号：US20140126659A1
公开(公告)日：2014-05-08
申请号：US13246577
申请日：2011-09-27
申请人： Sudhir Srinivasa , Hongyuan Zhang
发明人： Sudhir Srinivasa , Hongyuan Zhang
IPC分类号： H04L27/28
CPC分类号： H04L1/0643 , H04L1/0016 , H04L1/0042 , H04L5/0044 , H04L27/2602 , H04L27/2626
摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a plurality of information bits to be included in the PHY data unit is received. A number of padding bits that need to be added to the information bits such that the information bits, after having been encoded, fill an integer number of orthogonal frequency division multiplexing (OFDM) symbols is determined. The number of padding bits is added to the information bits prior to encoding and the information bits are parsed to a number of encoders. The information bits are encoded to generate coded data bits. A last block of the data unit is encoded differently from the previous blocks. The PHY data unit to include the coded data bits is generated.
摘要翻译：在通过通信信道生成用于发送的物理层（PHY）数据单元的方法中，接收要包括在PHY数据单元中的多个信息位。需要添加到信息比特的多个填充比特，使得已经被编码之后的信息比特填满整数个正交频分复用（OFDM）符号。将填充比特数添加到编码前的信息比特，并将信息比特解析为多个编码器。信息位被编码以产生编码数据位。数据单元的最后一个块与先前的块不同的编码。生成包含编码数据位的PHY数据单元。

45. 发明授权

US08462863B1 Midamble for WLAN PHY frames 有权
标题翻译： Midamble用于WLAN PHY帧
公开(公告)号：US08462863B1
公开(公告)日：2013-06-11
申请号：US12841772
申请日：2010-07-22
申请人： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa
发明人： Hongyuan Zhang , Rohit U. Nabar , Sudhir Srinivasa
IPC分类号： H04K1/10
CPC分类号： H04L27/2602 , H04L27/2613
摘要： In a method for generating a single data unit for transmission via a communication channel, a preamble and a first portion of a data payload of the single data unit are generated. A midamble is generated, the midamble including at least one OFDM (Orthogonal Frequency Division Multiplexing) symbol that includes calibration information. A second portion of the data payload of the single data unit is generated, and the midamble is included between the first portion of the data payload and the second portion of the data payload.
摘要翻译：在用于生成用于经由通信信道传输的单个数据单元的方法中，生成单个数据单元的数据有效载荷的前导码和第一部分。生成中间码，中间码包括至少一个包括校准信息的OFDM（正交频分复用）符号。产生单个数据单元的数据有效载荷的第二部分，并且中间码被包括在数据有效载荷的第一部分和数据有效载荷的第二部分之间。

46. 发明授权

US08442141B1 Opportunistic beamforming in a wireless communication system 有权
公开(公告)号：US08442141B1
公开(公告)日：2013-05-14
申请号：US12751484
申请日：2010-03-31
申请人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar
发明人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/043 , H04B7/0417 , H04L1/06
摘要： A method for processing a preamble of a data unit transmitted via a communication channel includes receiving a signal via a plurality of antennas, applying a plurality of distinct steering vectors to the received signal to generate a plurality of respective outputs, and using the plurality of outputs to perform at least one of carrier sensing and symbol timing synchronization associated with the preamble.

47. 发明申请

US20130044743A1 SIGNAL FIELD DESIGN FOR WLAN 有权
标题翻译： WLAN的信号场设计
公开(公告)号：US20130044743A1
公开(公告)日：2013-02-21
申请号：US13587681
申请日：2012-08-16
申请人： Hongyuan Zhang , Raja Banerjea , Yong Liu , Sudhir Srinivasa
发明人： Hongyuan Zhang , Raja Banerjea , Yong Liu , Sudhir Srinivasa
IPC分类号： H04W84/12
CPC分类号： H04W28/18 , H04L69/22 , H04L69/323 , H04W84/12
摘要： A method of generating packets for transmission in a wireless communication system, wherein each packet includes a SIG field that includes a first SIG subfield, includes generating a data packet and a null data packet. Generating the data packet includes generating information bits of the first SIG subfield of the data packet and generating the data portion of the data packet. The information bits of the first SIG subfield of the data packet indicate, to a receiving device, a length corresponding to a data portion of the data packet. Generating the null data packet includes generating information bits of the first SIG subfield of the null data packet. The information bits of the first SIG subfield of the null data packet indicate, to a receiving device, a first physical layer (PHY) parameter value associated with the null data packet. The first PHY parameter value is not a length value.
摘要翻译：一种在无线通信系统中生成用于发送的分组的方法，其中每个分组包括包括第一SIG子字段的SIG字段，包括生成数据分组和空数据分组。产生数据分组包括生成数据分组的第一SIG子字段的信息比特并生成数据分组的数据部分。数据分组的第一SIG子字段的信息比特向接收设备指示对应于数据分组的数据部分的长度。生成空数据分组包括产生空数据分组的第一SIG子字段的信息比特。空数据分组的第一SIG子字段的信息位向接收设备指示与空数据分组相关联的第一物理层（PHY）参数值。第一个PHY参数值不是长度值。

48. 发明申请

US20130044742A1 SIGNAL FIELD DESIGN FOR WLAN 有权
标题翻译： WLAN的信号场设计
公开(公告)号：US20130044742A1
公开(公告)日：2013-02-21
申请号：US13587667
申请日：2012-08-16
申请人： Hongyuan Zhang , Raja Banerjea , Yong Liu , Sudhir Srinivasa
发明人： Hongyuan Zhang , Raja Banerjea , Yong Liu , Sudhir Srinivasa
IPC分类号： H04L29/02 , H04W84/12
CPC分类号： H04W28/18 , H04L69/22 , H04L69/323 , H04W84/12
摘要： A method of generating packets for transmission in a wireless communication system. The method comprises generating a data packet and generating a null data packet. Generating the data packet includes generating a data packet signal (SIG) field including a first data packet SIG subfield indicating a first physical layer (PHY) parameter to a receiving device. Generating the data packet also includes generating a data field. Furthermore, generating the null data packet includes generating a null data packet SIG field. The null data packet SIG field includes a first null data packet SIG subfield indicating a second PHY parameter to a receiving device. The data packet SIG field excludes any SIG subfield indicating the second PHY parameter to a receiving device, and (ii) the null data packet SIG field excludes any SIG subfield indicating the first PHY parameter to a receiving device.
摘要翻译：一种在无线通信系统中生成用于传输的分组的方法。该方法包括生成数据分组并生成空数据分组。生成数据分组包括生成包括指示接收设备的第一物理层（PHY）参数的第一数据分组SIG子字段的数据分组信号（SIG）字段。生成数据包还包括生成数据字段。此外，生成空数据分组包括生成空数据分组SIG字段。空数据分组SIG字段包括向接收设备指示第二PHY参数的第一空数据分组SIG子字段。数据分组SIG字段将指示第二PHY参数的任何SIG子字段排除到接收设备，并且（ii）空数据分组SIG字段将指示第一PHY参数的任何SIG子字段排除到接收设备。

49. 发明申请

US20120051447A1 Optimum Interleaver Design for a Communication System 有权
标题翻译：通信系统的最佳交织器设计
公开(公告)号：US20120051447A1
公开(公告)日：2012-03-01
申请号：US13212440
申请日：2011-08-18
申请人： Yihong Qi , Sudhir Srinivasa , Hongyuan Zhang
发明人： Yihong Qi , Sudhir Srinivasa , Hongyuan Zhang
IPC分类号： H04L27/00
CPC分类号： H04B7/046 , H04L1/0009 , H04L1/0071 , H04L1/0643 , H04L1/203 , H04L5/0046 , H04L27/2601
摘要： In a method for interleaving information bits in a physical layer (PHY) data unit, a channel bandwidth to be used for transmitting the PHY data unit is determined and a frequency rotation parameter NROT corresponding to the channel bandwidth is selected. A spatial stream constant is selected for each spatial stream from the set [0, 5, 2, 7, 3, 6, 1, 4] or a subset thereof depending on a number of spatial streams to be utilized, wherein each constant in the set corresponds to a respective spatial stream. Information bits are interleaved according to the selected frequency rotation parameter NROT and the selected spatial stream constant.
摘要翻译：在用于交织物理层（PHY）数据单元中的信息比特的方法中，确定要用于发送PHY数据单元的信道带宽，并且选择与信道带宽对应的频率旋转参数NROT。根据要利用的空间流的数量，从集合[0,5,2,7,3,6,1,4]或其子集为每个空间流选择空间流常数，其中，集合对应于相应的空间流。信息比特根据所选择的频率旋转参数NROT和所选择的空间流常数进行交织。

50. 发明申请

US20120039406A1 CHANNEL DESCRIPTION FEEDBACK IN A COMMUNICATION SYSTEM 有权
标题翻译：通道说明反馈在通信系统
公开(公告)号：US20120039406A1
公开(公告)日：2012-02-16
申请号：US13207003
申请日：2011-08-10
申请人： Sudhir Srinivasa , Hongyuan Zhang , Hyukjoon Kwon
发明人： Sudhir Srinivasa , Hongyuan Zhang , Hyukjoon Kwon
IPC分类号： H04L27/28
CPC分类号： H04L25/0206 , H04B7/0417 , H04L1/0693 , H04L5/0005 , H04L5/0023 , H04L25/0202 , H04L25/022
摘要： In a method for estimating a channel between a transmitter and a receiver in a communication network, a plurality of training signal fields are received at the receiver. Each training signal field includes a plurality of orthogonal frequency division multiplexing (OFDM) tones, and the OFDM tones include at least a plurality of training data tones and one or more pilot tones. Channel estimate data corresponding to the plurality of training data tones and the one or more pilot tones is determined. Channel estimate data corresponding to only a subset of the OFDM tones or data generated using the channel estimate data corresponding to the subset of OFDM tones is transmitted to the transmitter, wherein the subset excludes pilot tones.
摘要翻译：在通信网络中用于估计发射机和接收机之间的信道的方法中，在接收机处接收多个训练信号字段。每个训练信号字段包括多个正交频分复用（OFDM）音调，并且OFDM音调包括至少多个训练数据音调和一个或多个导频音调。确定对应于多个训练数据音调和一个或多个导频音调的信道估计数据。仅对应于OFDM音调的子集的频道估计数据或使用对应于OFDM音调的子集的信道估计数据生成的数据被发送到发射机，其中该子集排除导频音调。

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