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31. 发明申请

US20110105051A1 DIFFERENTIAL CLOSED-LOOP TRANSMISSION FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中的差分闭环传输反馈
公开(公告)号：US20110105051A1
公开(公告)日：2011-05-05
申请号：US12872085
申请日：2010-08-31
申请人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
发明人： Timothy A. Thomas , Bishwarup Mondal , Eugene Visotsky , Frederick W. Vook
IPC分类号： H04B7/005
CPC分类号： H04L27/2601 , H04B7/0617 , H04B7/0623 , H04B7/0641 , H04L25/0242 , H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. Matrix Ct is also calculated and is based on a previous quantized covariance matrix (Rqt-1), the covariance matrix (R) at time t, and a forgetting factor (γ) that is applied to Rqt-1. The Ct is then used to create a DERC feedback message (signal or waveform) and may be transmitted with pilots on a proper feedback channel to a base unit. The base unit receives the feedback (Ct) as a DERC waveform on a proper feedback channel. The base unit uses non-coherent or coherent detection to detect the DERC values send by the remote unit and uses the DERC values with a previous quantized covariance matrix estimate, a forgetting factor, and a weighting value to compute a covariance matrix estimate to use for beamforming. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，计算时间t（R）处的协方差矩阵作为接收的下行链路信号的函数。还计算矩阵Ct，并且基于先前的量化协方差矩阵（Rqt-1），时间t的协方差矩阵（R）和应用于Rqt-1的遗忘因子（γ）。然后，Ct用于创建DERC反馈消息（信号或波形），并且可以在适当的反馈信道上的导频发送到基本单元。基本单元在适当的反馈通道上接收反馈（Ct）作为DERC波形。基本单元使用非相干或相干检测来检测远程单元发送的DERC值，并且使用具有先前的量化协方差矩阵估计，遗忘因子和加权值的DERC值来计算协方差矩阵估计，以用于波束成形。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。

32. 发明授权

US06912195B2 Frequency-domain MIMO processing method and system 有权
标题翻译：频域MIMO处理方法和系统
公开(公告)号：US06912195B2
公开(公告)日：2005-06-28
申请号：US10032602
申请日：2001-10-28
申请人： Frederick W. Vook , Timothy A. Thomas
发明人： Frederick W. Vook , Timothy A. Thomas
IPC分类号： H04B7/04 , H04L25/03 , H04J11/00 , H04L1/22
CPC分类号： H04L25/03159 , H04B7/0413 , H04L2025/03382 , H04L2025/03522
摘要： A communication system based upon frequency-domain MIMO processing is disclosed. A transmitting device of the communication system transforms time-domain signals into frequency-domain signals, and weights each frequency-domain signal to form weighted frequency-domain signals with each weighted frequency-domain signal being a function of each frequency-domain signal. The transmitting device transmits weighted time-domain waveforms as a function of the weighted frequency-domain signals. In response thereto, a receiving device of the communication system provides frequency-domain samples that are a function of the one or more weighted time-domain waveforms and weights each frequency-domain sample to form one or more weighted frequency-domain samples with each weighted frequency-domain sample being a function of each frequency-domain sample. The receiving device decodes the weighted frequency-domain sample to obtain the information represented by the time-domain signals.
摘要翻译：公开了一种基于频域MIMO处理的通信系统。通信系统的发送装置将时域信号变换为频域信号，对每个频域信号进行加权，以形成加权的频域信号，每个加权的频域信号是每个频域信号的函数。发送装置发送加权时域波形作为加权的频域信号的函数。响应于此，通信系统的接收装置提供作为一个或多个加权时域波形的函数的频域采样，并对每个频域采样进行加权，以形成一个或多个加权频域样本，频域样本是每个频域样本的函数。接收设备对加权的频域样本进行解码以获得由时域信号表示的信息。

33. 发明授权

US06885708B2 Training prefix modulation method and receiver 有权
标题翻译：训练前缀调制方法和接收器
公开(公告)号：US06885708B2
公开(公告)日：2005-04-26
申请号：US10198487
申请日：2002-07-18
申请人： Timothy A. Thomas , Vijay Nangia , Kevin L. Baum , Frederick W. Vook
发明人： Timothy A. Thomas , Vijay Nangia , Kevin L. Baum , Frederick W. Vook
IPC分类号： H04L25/02 , H04L25/03 , H04L27/26 , H04L27/28
CPC分类号： H04L27/2605 , H04L25/0226 , H04L25/03006 , H04L27/2607 , H04L2025/03414 , H04L2025/03522
摘要： A receiver for implementing a training prefix modulation method in response to a reception of a signal propagating through a channel is disclosed. The signal as received includes training blocks with each training block having a data inter-block-interference therein, and data blocks with each data block having a training inter-block-interference therein. The signal is selectively reconstructed to provide a circular appearance of the channel over the data blocks. Specifically, an estimate of the training inter-block-interferences is generated and subtracted from the data blocks. And, an estimate of the data inter-block interferences is generated and added to the data blocks.
摘要翻译：公开了一种用于响应于通过信道传播的信号的接收来实现训练前缀调制方法的接收机。所接收的信号包括训练块，其中每个训练块在其中具有数据块间干扰，以及每个数据块在其中具有训练块间干扰的数据块。该信号被选择性地重构以提供数据块上的信道的圆形外观。具体地，生成训练块间干扰的估计并从数据块中减去。并且，生成数据块间干扰的估计并将其添加到数据块。

34. 发明授权

US06647078B1 Method and device for multi-user frequency-domain channel estimation based on gradient optimization techniques 有权
标题翻译：基于梯度优化技术的多用户频域信道估计方法与装置
公开(公告)号：US06647078B1
公开(公告)日：2003-11-11
申请号：US09608582
申请日：2000-06-30
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04B110
CPC分类号： H04L25/0204 , H04L25/025
摘要： The invention is a method of estimating the time and frequency response of at least one desired signal received by at least one antenna, based on Gradient Optimization techniques. Through the use of gradient optimization techniques and efficient DFT processing, the invention provides frequency response estimates that require fewer computations than prior art decision-directed channel estimation devices.
摘要翻译：本发明是一种基于梯度优化技术来估计由至少一个天线接收的至少一个期望信号的时间和频率响应的方法。通过使用梯度优化技术和有效的DFT处理，本发明提供了比现有技术的决策导向信道估计装置更少的计算的频率响应估计。

35. 发明授权

US06445342B1 Method and device for multi-user frequency-domain channel estimation 失效
标题翻译：多用户频域信道估计的方法和装置
公开(公告)号：US06445342B1
公开(公告)日：2002-09-03
申请号：US09608760
申请日：2000-06-30
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04B700
CPC分类号： H04L25/022 , H04B7/01
摘要： The present invention is a technique of estimating the time and frequency response of at least one desired signal received by at least one antenna. The invention is an update formula for the time-invariant channel responses for multiple transmitting devices, called “Doppler channels”, that model the time-varying channel between each of the transmitting devices and each receiving device. Through use of the update formula, the time-varying channels of the multiple transmitting devices can be better tracked than with prior inventions.
摘要翻译：本发明是估计由至少一个天线接收的至少一个期望信号的时间和频率响应的技术。本发明是一种称为“多普勒频道”的多发射设备的时不变信道响应的更新公式，其对每个发射设备和每个接收设备之间的时变信道进行建模。通过使用更新公式，可以比先前的发明更好地跟踪多个发送装置的时变信道。

36. 发明授权

US6141393A Method and device for channel estimation, equalization, and interference suppression 有权
标题翻译：用于信道估计，均衡和干扰抑制的方法和装置
公开(公告)号：US6141393A
公开(公告)日：2000-10-31
申请号：US261510
申请日：1999-03-03
申请人： Timothy A. Thomas , Frederick W. Vook , Kevin L. Baum
发明人： Timothy A. Thomas , Frederick W. Vook , Kevin L. Baum
IPC分类号： H04B7/08 , H04L25/02 , H04L27/26 , H04L1/02
CPC分类号： H04B7/0851 , H04L25/0204 , H04L25/0232 , H04L27/2647
摘要： A method and device in a communication system including a receiver having a plurality of receiving antennas for receiving a plurality of information bursts transmitted by at least one transmitting user device where the information bursts contain a number of data symbols and a pilot symbol sequence of content known at both the transmitting user device and the receiver. The method provides for computing a channel transfer function between the transmitting user device at each of the plurality of receiving antennas, by computing a simulated received pilot signal for each receiving antenna, computing an error signal between the simulated received pilot signal and the received pilot symbol sequence, computing a channel modeling sequence, wherein the power of the error signal is minimized, and computing the channel transfer function by weighting predetermined basis functions by the channel modeling sequence.
摘要翻译：一种通信系统中的方法和装置，包括具有多个接收天线的接收机，所述接收天线用于接收由至少一个发送用户设备发送的多个信息突发，其中所述信息突发包含多个数据符号和已知的内容的导频符号序列在发送用户设备和接收机两者上。该方法通过计算每个接收天线的模拟接收导频信号来计算在多个接收天线中的每一个处的发射用户设备之间的信道传递函数，计算模拟的接收导频信号与接收到的导频符号之间的误差信号序列，计算信道建模序列，其中误差信号的功率最小化，以及通过信道建模序列加权预定的基函数来计算信道传递函数。

37. 发明申请

US20100260234A1 CLOSED-LOOP TRANSMISSION FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
标题翻译：无线通信系统中的闭环传输反馈
公开(公告)号：US20100260234A1
公开(公告)日：2010-10-14
申请号：US12421573
申请日：2009-04-09
申请人： Timothy A. Thomas , William J. Hillery , Bishwarup Mondal , Frederick W. Vook , Fan Wang
发明人： Timothy A. Thomas , William J. Hillery , Bishwarup Mondal , Frederick W. Vook , Fan Wang
IPC分类号： H04B1/707
CPC分类号： H04L1/0026 , H04B1/7103 , H04B7/0417 , H04B7/066 , H04B2201/70702 , H04B2201/709709 , H04J13/0003 , H04L1/1607 , H04L5/0053 , H04L5/0057 , H04L25/0206 , H04L25/021 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L27/2626 , H04L2025/03414 , H04L2025/03426 , H04L2025/03808 , H04L2025/03815
摘要： Channel information feedback takes place by calculating channel information to feed back to the base station. The channel quality information is spread by a remote unit with spreading codes from mutually unbiased bases and transmitted to the base station. The advantages of spreading the feedback channel are that multiple mobiles can send their feedback on the same time-frequency resources making the feedback very efficient and also improving feedback performance through orthogonal spreading which gives a spreading gain above noise and interference. Using the spreading codes from mutually unbiased bases can reduce interference across sectors.
摘要翻译：信道信息反馈通过计算信道信息反馈给基站进行。信道质量信息由具有来自相互无偏置的基站的扩展码的远程单元传播并被发送到基站。扩展反馈信道的优点是，多个移动台可以在相同的时间 - 频率资源上发送其反馈，从而使得该反馈非常有效，并且还通过正交扩频来提高反馈性能，其给出高于噪声和干扰的扩频增益。使用来自相互无偏的基地的扩展码可以减少扇区之间的干扰。

38. 发明申请

US20080181191A1 METHOD AND APPARATUS FOR FINITE IMPULSE RESPONSE CYCLIC-SHIFT DIVERSITY 有权
标题翻译：有意义的反应循环移位多样性的方法和装置
公开(公告)号：US20080181191A1
公开(公告)日：2008-07-31
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04H1/00
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译：描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加以形成每个发射天线的时域数据流。在传输之前，将循环扩展添加到每个数据流。

39. 发明申请

US20070274197A1 METHOD AND APPARATUS FOR PERFORMING STREAM WEIGHTING IN AN SDMA COMMUNICATION SYSTEM 有权
标题翻译：用于在SDMA通信系统中执行流加权的方法和装置
公开(公告)号：US20070274197A1
公开(公告)日：2007-11-29
申请号：US11419856
申请日：2006-05-23
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04J3/10
CPC分类号： H04B7/0617 , H04B7/0697
摘要： A method and apparatus for performing stream weighting in a spatial-division multiple access communication system is provided herein. During operation the base station receiver receives channel information from mobiles (also known as users or nodes) and calculates transmit antenna weights that that maximize the power delivered to each mobile while allowing for a small amount of crosstalk to exist between users. Information or data is transmitted to the nodes utilizing the appropriate stream weights. By allowing tolerable amounts of cross talk, the coherent gain to the desired SDMA user can be increased, and thus the overall performance is improved.
摘要翻译：本文提供了一种在空分多址通信系统中执行流加权的方法和装置。在操作期间，基站接收机从移动台（也称为用户或节点）接收信道信息，并且计算发射天线权重，其使输送到每个移动台的功率最大化，同时允许在用户之间存在少量串扰。使用适当的流权重将信息或数据传送到节点。通过允许容忍量的串扰，可以增加对期望的SDMA用户的相干增益，从而提高整体性能。

40. 发明授权

US07133461B2 Stream transmission method and device 有权
公开(公告)号：US07133461B2
公开(公告)日：2006-11-07
申请号：US10017444
申请日：2001-12-14
申请人： Timothy A. Thomas , Frederick W. Vook
发明人： Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04L27/04 , H04L27/12 , H04L27/20
CPC分类号： H04W52/343 , H04B7/0615 , H04L1/0618 , H04W52/346 , H04W52/42
摘要： A transmitter for implementing a stream transmission method is disclosed. Optionally, the transmitter first determines an equal weighting of a plurality of stream weights and transmits a plurality of transmission signals as a function of a plurality of data streams and the equal weighting of the plurality of stream weights. Thereafter, the transmitter reiterates as needed a determination of an unequal weighting of the plurality of stream weights and a transmission of the plurality of transmission signals as a function of the plurality of data streams and the unequal weighting of the plurality of stream weights.

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