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1. 发明授权

US09066244B2 Uplink signal bandwidth characterization from channel state information 有权
标题翻译：通道状态信息上行信号带宽表征
公开(公告)号：US09066244B2
公开(公告)日：2015-06-23
申请号：US13459330
申请日：2012-04-30
申请人： Matthew A. Silverman , Paul J. Stager , Brian D. Hart , Mohammad Janani , Ahmadreza Hedayat
发明人： Matthew A. Silverman , Paul J. Stager , Brian D. Hart , Mohammad Janani , Ahmadreza Hedayat
IPC分类号： H04L5/00 , H04W16/28 , H04B7/04 , H04W72/12
CPC分类号： H04W16/28 , H04B7/04 , H04B7/0404 , H04L5/001 , H04L5/0039 , H04W72/046 , H04W72/1231
摘要： Techniques are provided to determine whether or not incident power at a wireless communication device in at least two frequency channels is from the same device. Incident power in frequency channels allocated to a basic service set in a wireless network is received at a plurality of antennas of the wireless communication device. Channel state information is computed for at least two frequency channels allocated to the basic service set. One or more metrics are generated based on the channel state information in the two frequency channels. The one or more metrics are evaluated to characterize an uplink signal bandwidth associated with the two channels to determine whether or not the incident power in the two channels is from the same device.
摘要翻译：提供技术来确定在至少两个频率信道中的无线通信设备处的入站功率是否来自同一设备。在无线通信装置的多个天线处接收分配给无线网络中的基本业务集的频道中的入局功率。为分配给基本服务集的至少两个频率信道计算信道状态信息。基于两个频道中的信道状态信息生成一个或多个度量。评估一个或多个度量以表征与两个信道相关联的上行链路信号带宽，以确定两个信道中的入局功率是否来自同一设备。

2. 发明授权

US08873384B2 Bandwidth indication in RTS/CTS frames 有权
标题翻译： RTS / CTS帧中的带宽指示
公开(公告)号：US08873384B2
公开(公告)日：2014-10-28
申请号：US12916957
申请日：2010-11-01
申请人： Brian Hart , Ahmadreza Hedayat
发明人： Brian Hart , Ahmadreza Hedayat
IPC分类号： G08C15/00 , H04L1/00 , H04L5/14 , H04L5/00 , H04W28/20
CPC分类号： H04L5/1438 , H04L1/0054 , H04L1/0061 , H04L5/001 , H04L5/0064 , H04L5/0092 , H04W28/20
摘要： Disclosed in an example embodiment is an apparatus comprising a transmitter and processing logic coupled with the transmitter. The processing logic is configured to send data via the transmitter. The processing logic generates a request to send frame. The processing logic encodes data representative of a bandwidth parameter set in the request to send frame. The processing logic transmits the request to send frame via the transmitter.
摘要翻译：在示例实施例中公开的是包括与发射机耦合的发射机和处理逻辑的装置。处理逻辑被配置为经由发送器发送数据。处理逻辑产生发送帧请求。处理逻辑对表示发送帧请求中设置的带宽参数的数据进行编码。处理逻辑通过发送器发送请求发送帧。

3. 发明授权

US08494073B2 Beamforming weight estimation using wideband multipath direction of arrival analysis 有权
标题翻译：使用宽带多径方向到达分析的波束成形权重估计
公开(公告)号：US08494073B2
公开(公告)日：2013-07-23
申请号：US12502607
申请日：2009-07-14
申请人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
发明人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
IPC分类号： H04L1/02 , H04M1/00
CPC分类号： H04B7/0617 , H04B7/0439 , H04B7/086
摘要： Techniques are provided for computing downlink beamforming weights based on the received data at a base station from a mobile station in a MIMO communication system. An uplink transmission is received at a plurality of antennas at a first communication device from a second communication device, where the uplink transmission comprises a plurality of uplink subbands. The uplink spatial signature is estimated for each of the plurality of uplink subbands. The uplink spatial signature is decomposed into a plurality of direction of arrival (DOA) components for each uplink subband using a transform. Data representing multiple propagation paths between the first communication device and the second communication device is computed for each DOA component. A plurality of direction of departure (DOD) components for each of a plurality of downlink subbands is computed based on the data representing the multiple propagation paths. A downlink spatial signature for each downlink subband from the plurality of DOD components is computed using an inverse of the transform. Downlink beamforming weights are computed for each of the plurality of downlink subbands based on the downlink spatial signature, where the downlink beamforming weights are for use by the first communication device when beamforming a downlink transmission via the plurality of antennas of the first communication device to the second communication device.
摘要翻译：提供了用于基于MIMO通信系统中的移动台在基站处接收到的数据来计算下行链路波束成形权重的技术。在来自第二通信设备的第一通信设备的多个天线处接收上行链路传输，其中上行链路传输包括多个上行链路子带。针对多个上行链路子带中的每一个估计上行链路空间特征。使用变换将上行链路空间特征分解为每个上行链路子带的多个到达方向（DOA）分量。针对每个DOA分量计算代表第一通信设备和第二通信设备之间的多个传播路径的数据。基于表示多个传播路径的数据来计算多个下行链路子带中的每一个的多个出发方向（DOD）分量。使用变换的倒数来计算来自多个DOD分量的每个下行链路子带的下行链路空间特征。基于下行链路空间特征，针对多个下行链路子带中的每一个计算下行链路波束形成权重，其中下行链路波束赋形权重由第一通信设备使用时，当波束成形通过第一通信设备的多个天线的下行链路传输到第二通信设备。

4. 发明申请

US20120328053A1 Orthogonal Frequency Division Multiplexed (OFDM) Demodulator Imbalance Estimation 有权
标题翻译：正交频分复用（OFDM）解调器不平衡估计
公开(公告)号：US20120328053A1
公开(公告)日：2012-12-27
申请号：US13169172
申请日：2011-06-27
申请人： Mohammad Janani , Ahmadreza Hedayat
发明人： Mohammad Janani , Ahmadreza Hedayat
IPC分类号： H03K9/00 , H04L27/06 , H03D1/24
CPC分类号： H04L27/2657 , H04L27/3863
摘要： Techniques are provided for generating an estimate of the phase and magnitude imbalance of a receiver in a communication device. For each of a plurality of symbols in a signal received by the communication device, a plurality of tones that make up the symbol are obtained. For each of the plurality of symbols, each tone is multiplied by its respective mirror tone to produce a plurality of mirror tone multiplication results, and the plurality of the mirror tone multiplication results are summed over tones to produce a sum of multiplication results for each symbol. The total power of all tones for each symbol is obtained to produce a tone power quantity for each symbol. The estimate of the phase and magnitude imbalance in the received signal is generated based on the sum of the multiplication results for each of the plurality of symbols and the tone power quantity for each of the plurality of symbols.
摘要翻译：提供了用于产生通信设备中接收机的相位和幅度不平衡的估计的技术。对于由通信设备接收的信号中的多个符号中的每一个，获得构成符号的多个音调。对于多个符号中的每一个，每个音调乘以其相应的镜像音，以产生多个镜像相乘结果，并且多个镜像相乘结果在色调上求和，以产生每个符号的相乘结果之和。获得每个符号的所有音调的总功率，以产生每个符号的音调功率量。基于多个符号中的每个符号的相乘结果和多个符号中的每一个的音调功率量的和来生成接收信号中的相位和幅度不平衡的估计。

5. 发明授权

US08050622B2 Method and system for detecting messages using enhanced distributed signaling 有权
标题翻译：使用增强分布式信令检测消息的方法和系统
公开(公告)号：US08050622B2
公开(公告)日：2011-11-01
申请号：US11633169
申请日：2006-12-04
申请人： Ahmadreza Hedayat , Hang Jin , John Grabner
发明人： Ahmadreza Hedayat , Hang Jin , John Grabner
IPC分类号： H04B3/36 , H04B7/14
CPC分类号： H04B7/06 , H04B7/026 , H04B7/15592 , H04L1/0041 , H04L1/06 , H04L2001/0097
摘要： A method and system are provided for detecting messages using enhanced distributed signaling in a wireless communication network that offers transmission diversity to improve the throughput of participating wireless stations.
摘要翻译：提供了一种用于在提供传输分集以提高参与无线站的吞吐量的无线通信网络中使用增强分布式信令来检测消息的方法和系统。

6. 发明授权

US07733949B2 Wireless communications system with reduced sideband noise and carrier leakage 有权
标题翻译：具有降低边带噪声和载波泄漏的无线通信系统
公开(公告)号：US07733949B2
公开(公告)日：2010-06-08
申请号：US11592823
申请日：2006-11-04
申请人： Hang Jin , Ahmadreza Hedayat , George Bednekoff , Mitch Johnson , Wenhua Zhou , John Grabner
发明人： Hang Jin , Ahmadreza Hedayat , George Bednekoff , Mitch Johnson , Wenhua Zhou , John Grabner
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04B17/354
摘要： A wireless communications system is provided with reduced sideband noise and carrier leakage. In the system, at least one transmitter modulates at least one input signal with a first carrier to generate a modulated output signal, and at least one receiver receives the modulated output signal and demodulates the same with a second carrier to generate at least one demodulated output signal. The first and second carriers are at different frequencies, such that the sideband noise and carrier leakage generated by different sources can be distinguished.
摘要翻译：无线通信系统具有减少的边带噪声和载波泄漏。在该系统中，至少一个发射机利用第一载波来调制至少一个输入信号以产生经调制的输出信号，并且至少一个接收机接收调制的输出信号并用第二载波对其进行解调以产生至少一个解调输出信号。第一和第二载波处于不同的频率，使得可以区分由不同的源产生的边带噪声和载波泄漏。

7. 发明授权

US07620423B2 Method and system for creating beamformed channels in a multi-input multi-output network 有权
标题翻译：在多输入多输出网络中创建波束形成信道的方法和系统
公开(公告)号：US07620423B2
公开(公告)日：2009-11-17
申请号：US11546922
申请日：2006-10-12
申请人： Hang Jin , Ahmadreza Hedayat , John Grabner
发明人： Hang Jin , Ahmadreza Hedayat , John Grabner
IPC分类号： H04M1/00
CPC分类号： H04B7/0619 , H04B7/0413 , H04B7/0617 , H04B7/0691
摘要： The present invention discloses a method and system for signal communication in a multi-input multi-output network. The method creates beamformed channels by calculating one or more beamforming weighting vectors corresponding to one or more antennas on the receiving wireless station based on the predetermined receiving signals. The transmitting wireless station transmits one or more beamformed transmission signals to the receiving wireless station using the calculated beamforming weighting vectors for targeting at the antennas thereon, thereby creating two or more detectably uncorrelated transmission signals received at the receiving wireless station.
摘要翻译：本发明公开了一种多输入多输出网络中的信号通信方法和系统。该方法通过基于预定接收信号计算与接收无线站上的一个或多个天线相对应的一个或多个波束成形加权向量来创建波束形成信道。发送无线站使用计算出的波束成形加权向量将一个或多个波束形成的发送信号发送到接收无线站，用于在其上的天线上进行目标，由此产生在接收无线站处接收到的两个或更多个可检测地不相关的发送信号。

8. 发明申请

US20080320355A1 System for Identifying Localized Burst Errors 有权
标题翻译：识别本地化突发错误的系统
公开(公告)号：US20080320355A1
公开(公告)日：2008-12-25
申请号：US12200045
申请日：2008-08-28
申请人： Hanqing Lou , Ahmadreza Hedayat , Hang Jin
发明人： Hanqing Lou , Ahmadreza Hedayat , Hang Jin
IPC分类号： H03M13/05 , H04L1/18 , G06F11/14
CPC分类号： H03M13/4115 , H03M13/3738 , H03M13/6306 , H04L1/1809 , H04L1/1829
摘要： A system for detecting one or more localized burst errors in a receiving message comprised of a plurality of codewords. The system comprises a trellis code decoder for decoding a receiving message with a plurality of codewords and calculating one or more cumulative metrics of a maximum likelihood path and one or more alternative paths from the receiving message, an error detection code (EDC) decoder for detecting existence of one or more errors in the decoded receiving message received from the trellis decoder, and a localized burst error detector activated by the EDC decoder upon detecting the existence of one or more errors in the decoded receiving message to identify at least one corrupted codeword among the plurality of codewords using the one or more cumulative metrics of a maximum likelihood path and the one or more alternative paths, wherein the system requests the re-transmission of the corrupted codeword.
摘要翻译：一种用于检测由多个码字组成的接收消息中的一个或多个本地突发错误的系统。该系统包括格码解码器，用于对具有多个码字的接收消息进行解码，并从接收消息中计算最大似然路径和一个或多个替代路径的一个或多个累积度量，用于检测的检错码（EDC）解码器存在从网格解码器接收的解码的接收消息中的一个或多个错误，以及由EDC解码器检测到在解码的接收消息中存在一个或多个错误以识别至少一个损坏的码字的本地化突发错误检测器，所述多个码字使用最大似然路径和所述一个或多个替代路径的一个或多个累积度量，其中所述系统请求所述损坏的码字的重新发送。

9. 发明授权

US07454682B2 System for identifying localized burst errors 有权
标题翻译：用于识别本地突发错误的系统
公开(公告)号：US07454682B2
公开(公告)日：2008-11-18
申请号：US11743629
申请日：2007-05-02
申请人： Hanqing Lou , Ahmadreza Hedayat , Hang Jin
发明人： Hanqing Lou , Ahmadreza Hedayat , Hang Jin
IPC分类号： H04L1/18 , H03M13/00
CPC分类号： H03M13/4115 , H03M13/3738 , H03M13/6306 , H04L1/1809 , H04L1/1829
摘要： A system for detecting one or more localized burst errors in a receiving message comprised of a plurality of codewords. The system comprises a trellis code decoder for decoding a receiving message with a plurality of codewords and calculating one or more cumulative metrics of a maximum likelihood path and one or more alternative paths from the receiving message, an error detection code (EDC) decoder for detecting existence of one or more errors in the decoded receiving message received from the trellis decoder, and a localized burst error detector activated by the EDC decoder upon detecting the existence of one or more errors in the decoded receiving message to identify at least one corrupted codeword among the plurality of codewords using the one or more cumulative metrics of a maximum likelihood path and the one or more alternative paths, wherein the system requests the re-transmission of the corrupted codeword.
摘要翻译：一种用于检测由多个码字组成的接收消息中的一个或多个本地突发错误的系统。该系统包括格码解码器，用于对具有多个码字的接收消息进行解码，并从接收消息中计算最大似然路径和一个或多个替代路径的一个或多个累积度量，用于检测的检错码（EDC）解码器存在从网格解码器接收的解码的接收消息中的一个或多个错误，以及由EDC解码器检测到在解码的接收消息中存在一个或多个错误以识别至少一个损坏的码字的本地化突发错误检测器，所述多个码字使用最大似然路径和所述一个或多个替代路径的一个或多个累积度量，其中所述系统请求所述损坏的码字的重新发送。

10. 发明申请

US20080165882A1 Method and System for Resizing a MIMO Channel 有权
标题翻译：调整MIMO信道大小的方法和系统
公开(公告)号：US20080165882A1
公开(公告)日：2008-07-10
申请号：US11956280
申请日：2007-12-13
申请人： Ahmadreza Hedayat , Genyuan Wang , Mohammad Janani , Hanqing Lou
发明人： Ahmadreza Hedayat , Genyuan Wang , Mohammad Janani , Hanqing Lou
IPC分类号： H03M13/00 , H04L1/02
CPC分类号： H04L1/0625 , H04L1/0071
摘要： The present invention discloses a method for generating a signal stream in a multiple-input-multiple-output (MIMO) channel of a wireless communications system. The method comprises encoding at least one transmitting message into a first signal sequence, transforming the first signal sequence into a second and a third signal sequence by a first and a second predetermined rule, respectively, coupling the second signal sequence to a first antenna, coupling the third signal sequence to a second antenna, transmitting a signal stream comprising the first and second signal sequences to a mobile station.
摘要翻译：本发明公开了一种用于在无线通信系统的多输入多输出（MIMO）信道中生成信号流的方法。该方法包括将至少一个发送消息编码到第一信号序列中，分别通过第一和第二预定规则将第一信号序列转换成第二和第三信号序列，将第二信号序列耦合到第一天线，耦合将第三信号序列发送到第二天线，将包括第一和第二信号序列的信号流发送到移动台。

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