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41. 发明授权

US08164521B2 Pseudo-omni-directional beamforming with multiple narrow-band beams 有权
标题翻译：具有多个窄带波束的伪全向波束成形
公开(公告)号：US08164521B2
公开(公告)日：2012-04-24
申请号：US12197527
申请日：2008-08-25
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： G01S1/08
CPC分类号： H04W24/10 , H04B7/0408 , H04B7/0617 , H04B7/0632 , H04W16/28
摘要： In a technique for communication with a station on a wireless network, the technique includes forming a plurality of narrow-band beams, each having a different angular direction from an antenna of a base station and collectively distributed over a beamspace to form a pseudo-omni-directional beam pattern. That beamspace may span an entire spherical region or a portion thereof, for example, when the narrow-band beams are broadcast over a sector of an entire spherical region. The technique may assign each of the plurality of narrow-band beams to a different frequency band (such as a different channel band or sub-channel) on the wireless network. The technique may simultaneously broadcast the plurality of narrow-band beams in a time-varying manner such that the angular direction of each of the plurality of narrow-band beams varies with time, where that variation may be random or ordered.
摘要翻译：在用于与无线网络上的站通信的技术中，该技术包括形成多个窄带波束，每个窄带波束具有与基站的天线不同的角度方向，并且共同分布在波束空间上以形成伪全波段方向光束图案。该波束空间可以跨越整个球形区域或其一部分，例如当窄带波束在整个球形区域的扇区上广播时。该技术可以将多个窄带波束中的每一个分配给无线网络上的不同频带（例如，不同的信道频带或子信道）。该技术可以以时变方式同时广播多个窄带波束，使得多个窄带波束中的每一个的角度方向随时间变化，其中该变化可以是随机的或有序的。

42. 发明授权

US08130864B1 System and method of beamforming with reduced feedback 有权
标题翻译：具有减少反馈的波束成形的系统和方法
公开(公告)号：US08130864B1
公开(公告)日：2012-03-06
申请号：US12062462
申请日：2008-04-03
申请人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
发明人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04B7/0408 , H04B1/00 , H04B7/0417 , H04B7/0465 , H04B7/0473 , H04B7/0663 , H04L5/0023 , H04L25/0204 , H04L2025/03414 , H04L2025/03426
摘要： A system and method of beamforming may reduce feedback requirements. In some implementations, a beamforming technique may employ a diagonal matrix as a beamforming matrix along with a stream-to-transmit antenna mapping matrix. In some antenna phase beamforming strategies, a diagonal beamforming matrix in which the diagonal elements have a constant magnitude may be employed. Accordingly, a beamforming system may be utilized with few feedback information bits being transmitted from the beamformee; such a system may also minimize or eliminate power fluctuations among multiple transmit antennae.
摘要翻译：波束成形的系统和方法可以减少反馈要求。在一些实现中，波束形成技术可以采用对角矩阵作为波束形成矩阵以及流到发射天线映射矩阵。在一些天线相位波束形成策略中，可以采用其中对角元素具有恒定幅度的对角波束形成矩阵。因此，可以利用波束形成系统，而从波束形成器发送的反馈信息比特数很少; 这样的系统还可以最小化或消除多个发射天线之间的功率波动。

43. 发明授权

US08045450B1 Transmit diversity technique based on channel randomization for OFDM systems 有权
标题翻译：基于OFDM系统的信道随机化的发射分集技术
公开(公告)号：US08045450B1
公开(公告)日：2011-10-25
申请号：US12643169
申请日：2009-12-21
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04J11/00
CPC分类号： H04J11/0063 , H04B7/0413 , H04B7/0456 , H04B7/0615 , H04B7/0885 , H04L1/0606 , H04L27/2626 , H04L27/2647
摘要： A physical layer module includes a mapping module and a plurality of gain modules. The mapping module maps a plurality of coded data streams to a plurality of transmit antennas, in which each transmit antenna is associated with a respective radio frequency channel of a plurality of radio frequency channels. Each gain module is associated with a respective radio frequency channel of the plurality of radio frequency channels, and is configured to apply a complex gain to the coded data stream mapped to the respective radio frequency channel associated with the gain module. The complex gain applied by the gain module differs relative to that applied by other gain modules, and corresponds to the transmit antenna associated with the respective radio frequency channel.
摘要翻译：物理层模块包括映射模块和多个增益模块。映射模块将多个编码数据流映射到多个发射天线，其中每个发射天线与多个射频信道的相应射频信道相关联。每个增益模块与多个射频信道的相应射频信道相关联，并且被配置为对映射到与增益模块相关联的相应射频信道的编码数据流应用复增益。由增益模块应用的复合增益与其他增益模块所应用的复合增益不同，并且对应于与各个射频信道相关联的发射天线。

44. 发明授权

US08014472B1 Integer frequency offset estimation in wireless systems 有权
标题翻译：无线系统中的整数频偏估计
公开(公告)号：US08014472B1
公开(公告)日：2011-09-06
申请号：US12393017
申请日：2009-02-25
申请人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
发明人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
IPC分类号： H03D1/00
CPC分类号： H04L27/2675 , H04L27/2659 , H04L27/2679
摘要： Systems and techniques relating to wireless communications are described. A described technique includes receiving a plurality of symbols, observing a plurality of data samples in adjacent symbols, and calculating an estimate of an integer portion of a carrier frequency offset based on a cyclic shift and a phase shift of the data samples between symbols. Calculating the estimate can include calculating sum values corresponding to respective symbol indices. Each of the sum values can be based on a summation of max values that correspond to respective data subcarrier indices, the max values being based on a maximum of an absolute value of a real component of a base value and an absolute value of an imaginary component of the base value, where the base value is based on at least one of the data samples.
摘要翻译：描述与无线通信相关的系统和技术。所描述的技术包括接收多个符号，观察相邻符号中的多个数据样本，并且基于符号之间的数据采样的循环移位和相移来计算载波频率偏移的整数部分的估计。计算估计可以包括计算对应于各个符号索引的和值。每个和值可以基于对应于各个数据子载波索引的最大值的总和，最大值基于基本值的实数分量的绝对值的最大值和虚部的绝对值的基值，其中基值基于至少一个数据样本。

45. 发明授权

US08009768B1 Integer frequency offset estimation based on the maximum likelihood principal in OFDM systems 有权
标题翻译：基于OFDM系统中最大似然法的整数频偏估计
公开(公告)号：US08009768B1
公开(公告)日：2011-08-30
申请号：US11836768
申请日：2007-08-09
申请人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou
发明人： Jungwon Lee , Dimitrios-Alexandros Toumpakaris , Hui-Ling Lou
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L27/2659 , H04L27/2679
摘要： An apparatus includes an estimator that includes a receiver that receives a plurality of frequency-domain symbols. Each symbol includes at least one of a plurality of pilot samples and a plurality of data samples. The estimator also includes a framer that observes the at least one of the plurality of pilot samples and the plurality of data samples in adjacent symbols, and a calculator that calculates an integer carrier frequency offset (CFO) estimate based on a reliability metric based on the at least one of the plurality of pilot samples and the plurality of data samples that are included in the frequency-domain symbols.
摘要翻译：一种装置包括估计器，其包括接收多个频域符号的接收机。每个符号包括多个导频样本和多个数据样本中的至少一个。估计器还包括观察多个导频样本中的至少一个导频样本和相邻符号中的多个数据采样的成帧器，以及基于基于可靠性度量的整数载波频率偏移（CFO）估计的计算器所述多个导频样本和所述多个数据样本中的至少一个被包括在所述频域符号中。

46. 发明授权

US07961819B1 Space-time block decoder for a wireless communications system 有权
标题翻译：用于无线通信系统的时空块解码器
公开(公告)号：US07961819B1
公开(公告)日：2011-06-14
申请号：US12645606
申请日：2009-12-23
申请人： Hui-Ling Lou , Kok-Wui Cheong
发明人： Hui-Ling Lou , Kok-Wui Cheong
IPC分类号： H04L27/22
CPC分类号： H04L1/0631 , H04L25/0212 , H04L27/22 , H04L27/38 , H04W84/12
摘要： A wireless communications system including an antenna configured to receive a sequence of symbols through a channel, in which the sequence of symbols comprise bits of user data that have been previously mapped to the sequence of symbols. The wireless communications system further includes a demodulator configured to generate a sequence of demodulated symbols by multiplying the sequence of symbols by a conjugate of a channel response of the channel; a demultiplexer configured to generate an in-phase component and a quadrature component of each demodulated symbol in the sequence of demodulated symbols; a slicer configured to, for each demodulated symbol, generate a decoded symbol by performing a hard decision based on the in-phase component and the quadrature component of the demodulated symbol; and a bit mapping module configured to determine the bits of user data associated with each decoded symbol.
摘要翻译：一种无线通信系统，包括被配置为通过信道接收符号序列的天线，其中所述符号序列包括先前映射到所述符号序列的用户数据的比特。无线通信系统还包括解调器，其被配置为通过将符号序列乘以信道的信道响应的共轭来生成解调符号序列; 解复用器，被配置为在解调符号序列中产生每个解调符号的同相分量和正交分量; 一个限幅器，被配置为对于每个解调符号，通过基于解调符号的同相分量和正交分量执行硬判决来产生解码符号; 以及配置为确定与每个解码符号相关联的用户数据的比特的比特映射模块。

47. 发明授权

US07952990B1 Low complexity channel estimation for orthogonal frequency division modulation systems 有权
标题翻译：正交频分调制系统的低复杂度信道估计
公开(公告)号：US07952990B1
公开(公告)日：2011-05-31
申请号：US12628912
申请日：2009-12-01
申请人： Hui-Ling Lou , Kok-Wui Cheong
发明人： Hui-Ling Lou , Kok-Wui Cheong
IPC分类号： H04J11/00 , H03K9/00 , H04L27/00 , H04L7/00
CPC分类号： H04L25/0204 , H04L5/0007 , H04L25/022 , H04L25/0232 , H04L27/2601 , H04L27/261
摘要： Methods and systems for communication include receiving a signal across a channel, the signal indicative of a preamble and multiple data symbols, determining first channel estimate information of the channel based on the received preamble, using the first channel estimate information to demodulate a data symbol from the multiple data symbols as received, determining a constellation point based on the demodulated data symbol to produce a decoded data symbol, determining second channel estimate information based on the demodulated data symbol and the decoded data symbol, and using the second channel estimate information to demodulate an additional data symbol from the multiple data symbols as received.
摘要翻译：用于通信的方法和系统包括：通过信道接收信号，指示前导码的信号和多个数据符号，使用第一信道估计信息来基于所接收的前导码确定信道的第一信道估计信息，以从所接收的多个数据符号，基于解调的数据符号确定星座点以产生解码的数据符号，基于解调的数据符号和解码的数据符号确定第二信道估计信息，并且使用第二信道估计信息来解调来自所接收的多个数据符号的附加数据符号。

48. 发明授权

US07826812B1 Digital carrier-recovery scheme for FM stereo detection 有权
标题翻译：用于FM立体声检测的数字载波恢复方案
公开(公告)号：US07826812B1
公开(公告)日：2010-11-02
申请号：US12106989
申请日：2008-04-21
申请人： Hui-Ling Lou
发明人： Hui-Ling Lou
IPC分类号： H04B1/16 , H04B5/00
CPC分类号： H04B1/1653
摘要： Systems and techniques for digital processing of FM signals include, in at least one aspect, an FM digital processing method including receiving one or more digital signals including a first signal having a first frequency; obtaining a second signal by multiplying the first signal by X to assist in information recovery from the one or more digital signals based on the first signal; filtering the second signal to obtain a high frequency component of the second signal; delaying the second signal to obtain a delayed signal; and generating an output signal based on the high frequency component of the second signal and a normalization factor derived at least in part from the delayed signal.
摘要翻译： FM信号的数字处理的系统和技术在至少一个方面包括FM数字处理方法，其包括接收包括具有第一频率的第一信号的一个或多个数字信号; 通过将第一信号乘以X来获得第二信号，以帮助基于第一信号从一个或多个数字信号恢复信息; 对第二信号进行滤波以获得第二信号的高频分量; 延迟第二信号以获得延迟信号; 以及基于所述第二信号的高频分量产生输出信号，以及至少部分地根据所述延迟信号导出的归一化因子。

49. 发明申请

US20100248635A1 Sounding And Steering Protocols For Wireless Communications 有权
标题翻译：无线通信的探测和指导协议
公开(公告)号：US20100248635A1
公开(公告)日：2010-09-30
申请号：US12750636
申请日：2010-03-30
申请人： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar , Yong Liu
发明人： Hongyuan Zhang , Hui-Ling Lou , Rohit U. Nabar , Yong Liu
IPC分类号： H04B15/00 , H04B17/00
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0626 , H04B7/0634 , H04B7/0697 , H04L5/0048
摘要： The present disclosure includes systems, apparatuses, and techniques relating to wireless local area network devices. Systems, apparatuses, and techniques include communicating with multiple wireless communication devices to determine characteristics of spatial wireless channels, determining steering matrices based on one or more outputs of the communicating, and transmitting signals that concurrently provide data to the wireless communication devices via different spatial wireless channels. The signals can be spatially steered to the wireless communication devices based on the steering matrices.
摘要翻译：本公开包括与无线局域网设备相关的系统，设备和技术。系统，设备和技术包括与多个无线通信设备通信以确定空间无线信道的特性，基于通信的一个或多个输出来确定导向矩阵，以及发送通过不同的空间无线连接向无线通信设备提供数据的信号频道可以基于导向矩阵将信号空间转向无线通信设备。

50. 发明授权

US07778336B1 Timing and frequency synchronization of OFDM signals for changing channel conditions 有权
标题翻译：用于改变信道条件的OFDM信号的定时和频率同步
公开(公告)号：US07778336B1
公开(公告)日：2010-08-17
申请号：US11199840
申请日：2005-08-09
申请人： Dimitrios-Alexandros Toumpakaris , Jungwon Lee , Hui-Ling Lou
发明人： Dimitrios-Alexandros Toumpakaris , Jungwon Lee , Hui-Ling Lou
IPC分类号： H04K1/10
CPC分类号： H04L27/2659 , H04L27/266 , H04L27/2665
摘要： An Orthogonal Frequency Division Multiplexing (OFDM) synchronization module includes a window generator module, a symbol timing estimator module, and a reliability metric calculator. The window generator module generates a sampling window that bounds a plurality of samples of OFDM symbols. The symbol timing estimator module generates an estimated symbol timing from the plurality of samples before a fast Fourier transform operation is performed on the plurality of samples. The reliability metric calculator calculates a reliability metric for the estimated symbol timing based on the estimated symbol timing. The window generator module changes at least one parameter of the sampling window based on the reliability metric.
摘要翻译：正交频分复用（OFDM）同步模块包括窗口发生器模块，符号定时估计器模块和可靠性度量计算器。窗口生成器模块生成限定OFDM符号的多个采样的采样窗口。符号定时估计器模块在对多个样本执行快速傅里叶变换操作之前，从多个样本生成估计符号定时。可靠性度量计算器基于估计的符号定时计算估计的符号定时的可靠性度量。窗口生成器模块基于可靠性度量改变采样窗口的至少一个参数。

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