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81. 发明申请

US20100074301A1 UNIFIED MIMO TRANSMISSION AND RECEPTION 有权
标题翻译：统一的MIMO传输和接收
公开(公告)号：US20100074301A1
公开(公告)日：2010-03-25
申请号：US12534137
申请日：2009-08-02
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B1/69 , H04B7/02
CPC分类号： H04B7/0413 , H04B7/0417 , H04B7/0421 , H04B7/0617 , H04L1/0026
摘要： A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.
摘要翻译：描述了支持多种操作模式以实现有效数据传输的“统一”MIMO系统。每个操作模式与发送实体处的不同空间处理相关联。例如，可以为（1）全CSI或部分CSI传输定义四种操作模式，以及（2）具有或不具有导向发射分集（STD）的操作模式。可以基于各种因素（例如，良好信道估计的可用性）来选择适当的操作模式来使用。利用转向发射分集，数据在空间上扩展并在多个空间信道上传输，然后可以将单个速率用于用于数据传输的所有空间信道。接收实体可以针对所有操作模式使用最小均方误差（MMSE）技术。接收实体可以导出空间滤波器矩阵并且以相同的方式对所有操作模式执行接收机空间处理，尽管具有不同的有效信道响应矩阵。

82. 发明申请

US20090290655A1 TRANSMISSION MODE AND RATE SELECTION FOR A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：无线通信系统的传输模式和速率选择
公开(公告)号：US20090290655A1
公开(公告)日：2009-11-26
申请号：US12463078
申请日：2009-05-08
申请人： Santosh Abraham , Arnaud Meylan , Jay Rodney Walton
发明人： Santosh Abraham , Arnaud Meylan , Jay Rodney Walton
IPC分类号： H04B7/02
CPC分类号： H04L25/0202 , H04B7/0421 , H04L1/0002 , H04L1/0026
摘要： To select a transmission mode to use for a data transmission via a MIMO channel from station A to station B, station A obtains channel information used for spatial processing and determines the age of this information. Station A selects one of multiple transmission modes based on the age of the channel information and possibly other information (e.g., the fading characteristic of the MIMO channel). To select rate(s) to use for the data transmission, station A obtains channel state information (CSI) indicative of the received signal quality for the MIMO channel, e.g., received SNRs or “initial” rates. Station A determines the age of the CSI and selects one or more “final” rates based on the CSI, the age of the CSI, the selected transmission mode, and possibly other information. Station A processes data in accordance with the selected transmission mode and final rate(s) and transmits the processed data to station B.
摘要翻译：为了选择通过从站A到站B的MIMO信道进行数据传输的传输模式，站A获得用于空间处理的信道信息，并确定该信息的年龄。站A基于信道信息的年龄和可能的其他信息（例如，MIMO信道的衰落特性）来选择多种传输模式之一。为了选择用于数据传输的速率，站A获得指示MIMO信道的接收信号质量的信道状态信息（CSI），例如接收到的SNR或“初始”速率。站A确定CSI的年龄，并且基于CSI，CSI的年龄，所选择的传输模式以及可能的其他信息来选择一个或多个“最终”速率。站A根据选择的传输模式和最终速率处理数据，并将处理的数据发送到站B.

83. 发明申请

US20090190565A1 ACQUISITION OF TIMING INFORMATION IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中时序信息的获取
公开(公告)号：US20090190565A1
公开(公告)日：2009-07-30
申请号：US12022975
申请日：2008-01-30
申请人： Mark S. Wallace , Jay Rodney Walton , Irina Medvedev
发明人： Mark S. Wallace , Jay Rodney Walton , Irina Medvedev
IPC分类号： H04J3/00
CPC分类号： H04L27/2679 , H04L7/042 , H04L7/08 , H04L27/2655 , H04L27/2676
摘要： A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols.
摘要翻译：一种用于在无线通信系统中识别参考时间点的方法包括：接收第一重复符号序列; 接收第二重复符号序列; 执行所述第一和第二符号序列之间的自相关; 并且将第一和第二重复符号序列之间的自相关空值识别为时间上的参考点。用于在无线通信系统中识别参考点的设备包括：用于接收第一重复符号序列的装置; 用于接收第二重复符号序列的装置; 用于执行所述第一和第二符号序列之间的自相关的装置; 以及用于将所述第一和第二重复符号序列之间的自相关零点识别为所述参考点的装置。

84. 发明授权

US07564814B2 Transmission mode and rate selection for a wireless communication system 有权
标题翻译：无线通信系统的传输模式和速率选择
公开(公告)号：US07564814B2
公开(公告)日：2009-07-21
申请号：US11101086
申请日：2005-04-06
申请人： Santosh Abraham , Arnaud Meylan , Jay Rodney Walton
发明人： Santosh Abraham , Arnaud Meylan , Jay Rodney Walton
IPC分类号： H04W4/00
CPC分类号： H04L25/0202 , H04B7/0421 , H04L1/0002 , H04L1/0026
摘要： To select a transmission mode to use for a data transmission via a MIMO channel from station A to station B, station A obtains channel information used for spatial processing and determines the age of this information. Station A selects one of multiple transmission modes based on the age of the channel information and possibly other information (e.g., the fading characteristic of the MIMO channel). To select rate(s) to use for the data transmission, station A obtains channel state information (CSI) indicative of the received signal quality for the MIMO channel, e.g., received SNRs or “initial” rates. Station A determines the age of the CSI and selects one or more “final” rates based on the CSI, the age of the CSI, the selected transmission mode, and possibly other information. Station A processes data in accordance with the selected transmission mode and final rate(s) and transmits the processed data to station B.
摘要翻译：为了选择通过从站A到站B的MIMO信道进行数据传输的传输模式，站A获得用于空间处理的信道信息，并确定该信息的年龄。站A基于信道信息的年龄和可能的其他信息（例如，MIMO信道的衰落特性）来选择多种传输模式之一。为了选择用于数据传输的速率，站A获得指示MIMO信道的接收信号质量的信道状态信息（CSI），例如接收到的SNR或“初始”速率。站A确定CSI的年龄，并且基于CSI，CSI的年龄，所选择的传输模式以及可能的其他信息来选择一个或多个“最终”速率。站A根据选择的传输模式和最终速率处理数据，并将处理的数据发送到站B.

85. 发明授权

US08909174B2 Continuous beamforming for a MIMO-OFDM system 有权
标题翻译：用于MIMO-OFDM系统的连续波束成形
公开(公告)号：US08909174B2
公开(公告)日：2014-12-09
申请号：US12533765
申请日：2009-07-31
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0617 , H04B7/0408 , H04B7/0417 , H04B7/0626 , H04B7/0671
摘要： A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.
摘要翻译：发送实体对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。数据符号可以在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。接收实体执行补充处理以恢复由发送实体发送的数据符号。接收实体可以基于该子带的MIMO信道响应矩阵为每个子带导出空间滤波器矩阵，并且对于具有空间滤波器矩阵的子带执行接收机空间处理。

86. 发明授权

US08711763B2 Random access for wireless multiple-access communication systems 有权
标题翻译：无线多址通信系统的随机接入
公开(公告)号：US08711763B2
公开(公告)日：2014-04-29
申请号：US13353924
申请日：2012-01-19
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04W72/00 , H04W74/08 , H04W74/00 , H04W88/06
CPC分类号： H04W74/0833 , H04B7/0413 , H04B7/043 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04L1/0001 , H04L1/0009 , H04L1/0017 , H04L1/0059 , H04L1/0061 , H04L1/0068 , H04L1/0071 , H04L1/0618 , H04L1/08 , H04L1/16 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/261 , H04L27/2647 , H04L2001/0093 , H04W28/20 , H04W52/50 , H04W74/002 , H04W74/08 , H04W74/0866 , H04W88/06
摘要： Techniques for facilitating random access in wireless multiple-access communication systems are described. A random access channel (RACH) is defined to comprise a “fast” RACH (F-RACH) and a “slow” RACH (S-RACH). The F-RACH and S-RACH can efficiently support user terminals in different operating states and employ different designs. The F-RACH can be used to quickly access the system, and the S-RACH is more robust and can support user terminals in various operating states and conditions. The F-RACH may be used by user terminals that have registered with the system and can compensate for their round trip delays (RTDs) by properly advancing their transmit timing. The S-RACH may be used by user terminals that may or may not have registered with the system, and may or may not be able to compensate for their RTDs. Other aspects, embodiments, and features are also claimed and described.
摘要翻译：描述了用于促进无线多址通信系统中的随机接入的技术。随机接入信道（RACH）被定义为包括“快速”RACH（F-RACH）和“慢”RACH（S-RACH）。 F-RACH和S-RACH可以有效地支持不同操作状态的用户终端，并采用不同的设计。 F-RACH可以用于快速访问系统，而S-RACH更加强大，可以支持各种操作状态和条件下的用户终端。 F-RACH可以由已经向系统注册的用户终端使用，并且可以通过适当地提前发送定时来补偿它们的往返延迟（RTD）。 S-RACH可以由可能已经或可能没有在系统中注册的用户终端使用，并且可以或可能不能够补偿它们的RTD。还要求和描述其它方面，实施例和特征。

87. 发明授权

US08358714B2 Coding and modulation for multiple data streams in a communication system 有权
标题翻译：通信系统中多个数据流的编码和调制
公开(公告)号：US08358714B2
公开(公告)日：2013-01-22
申请号：US11190106
申请日：2005-07-25
申请人： Jay Rodney Walton , Irina Medvedev
发明人： Jay Rodney Walton , Irina Medvedev
IPC分类号： H04L1/02
CPC分类号： H04L1/0009 , H04L1/0003 , H04L1/06 , Y02D50/10
摘要： Techniques for transmitting multiple data streams to a single receiver using a single code rate and different modulation schemes are described. Channel estimates are determined for the multiple data streams and used to select a single code rate and multiple modulation schemes for the multiple data streams. The system may support a set of code rates, and each code rate may be associated with a respective set of modulation schemes that may be used with that code rate. The single code rate for all data streams is selected from among the set of supported code rates, and the modulation scheme for each data stream is selected from among the set of modulation schemes associated with the single code rate. The multiple data streams are encoded in accordance with the single code rate. Each data stream is further modulated in accordance with the modulation scheme selected for that stream.
摘要翻译：描述了使用单个码率和不同调制方案将多个数据流发送到单个接收机的技术。为多个数据流确定信道估计，并用于为多个数据流选择单个码率和多个调制方案。该系统可以支持一组码率，并且每个码率可以与可以与该码率一起使用的相应的一组调制方案相关联。从所支持的码率集合中选择所有数据流的单码率，并且从与单个码率相关联的调制方案组中选择每个数据流的调制方案。多个数据流根据单码率进行编码。根据为该流选择的调制方案进一步调制每个数据流。

88. 发明申请

US20120114019A1 RANGE EXTENSION TECHNIQUES FOR A WIRELESS LOCAL AREA NETWORK 有权
标题翻译：无线局域网的范围扩展技术
公开(公告)号：US20120114019A1
公开(公告)日：2012-05-10
申请号：US13277456
申请日：2011-10-20
申请人： Mark S. Wallace , Jay Rodney Walton
发明人： Mark S. Wallace , Jay Rodney Walton
IPC分类号： H04B1/709 , H04B1/707
CPC分类号： H04L27/0014 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2675 , H04L27/2676 , H04W74/02 , H04W84/12 , H04W88/04
摘要： Techniques for extending transmission range in a WLAN are described. In an aspect, a receiving station determines the frequency error between a transmitting station and the receiving station based on one or more initial packet transmissions and corrects this frequency error for subsequent packet transmissions received from the transmitting station. The residual frequency error is small after correcting for the frequency error and allows the receiving station to perform coherent accumulation/integration over a longer time interval to detect for a packet transmission. The longer coherent accumulation interval improves detection performance, especially at low SNRs for extended transmission range. The techniques may be used whenever the receiving station knows the identity of the transmitting station, e.g., if the subsequent packet transmissions are scheduled. Other aspects, features, and embodiments are also claimed and described.
摘要翻译：描述了在WLAN中扩展传输范围的技术。在一方面，接收站基于一个或多个初始分组传输来确定发射站和接收站之间的频率误差，并且校正该频率误差以用于从发射台接收的后续分组传输。在校正频率误差之后，剩余频率误差较小，并且允许接收站在更长的时间间隔上执行相干累积/积分以检测分组传输。较长的相干累加间隔提高了检测性能，特别是在扩展传输范围的低SNR时。每当接收站知道发射台的身份时，例如如果后续分组传输被调度，则可以使用这些技术。还要求和描述其它方面，特征和实施例。

89. 发明授权

US08036710B2 Power-efficient multi-antenna wireless device 有权
标题翻译：功率高效的多天线无线设备
公开(公告)号：US08036710B2
公开(公告)日：2011-10-11
申请号：US11047917
申请日：2005-01-31
申请人： Jay Rodney Walton , Franklin Peter Antonio , Mark S. Wallace , Sriram Narayan
发明人： Jay Rodney Walton , Franklin Peter Antonio , Mark S. Wallace , Sriram Narayan
IPC分类号： H04M1/00 , H04B1/38
CPC分类号： H04W52/029 , H04W52/0274 , Y02D70/00
摘要： A power-efficient wireless device is equipped with multiple (N) antennas. Each antenna is associated with a transmitter unit and a receiver unit. The wireless device also has processing units used to perform various digital processing tasks. The transmitter units, receiver units, and processing units may be selectively enabled or disabled. In an idle state, the wireless device may enable only a subset (e.g., one) of the N receiver units and one or few processing units for signal detection and acquisition. For active communication, the wireless device may enable Ntx transmitter units for data transmission and/or Nrx receiver units for data reception, where 1≦Ntx≦N and 1≦Nrx≦N. The enabled processing units may also be clocked at a lower frequency whenever data is transmitted or received at a data rate lower than the highest data rate. The wireless device may go to sleep whenever possible to conserve power.
摘要翻译：功率高效的无线设备配备有多（N）个天线。每个天线与发射机单元和接收机单元相关联。无线设备还具有用于执行各种数字处理任务的处理单元。可以选择性地启用或禁用发射机单元，接收机单元和处理单元。在空闲状态下，无线设备可以仅使得N个接收机单元中的子集（例如，一个）和用于信号检测和获取的一个或几个处理单元。对于主动通信，无线设备可以使Ntx发射机单元用于数据传输和/或Nrx接收机单元用于数据接收，其中1＆nlE; Ntx＆nlE; N和1＆nlE; Nrx＆nlE; N。每当以低于最高数据速率的数据速率发送或接收数据时，启用的处理单元也可以以更低的频率被计时。无线设备可能会尽可能地睡眠以节省电力。

90. 发明授权

US07995616B2 Acquisition of timing information in wireless communication systems 有权
标题翻译：无线通信系统中定时信息的获取
公开(公告)号：US07995616B2
公开(公告)日：2011-08-09
申请号：US12022975
申请日：2008-01-30
申请人： Mark S. Wallace , Jay Rodney Walton , Irina Medvedev
发明人： Mark S. Wallace , Jay Rodney Walton , Irina Medvedev
IPC分类号： H04J13/00
CPC分类号： H04L27/2679 , H04L7/042 , H04L7/08 , H04L27/2655 , H04L27/2676
摘要： A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols.
摘要翻译：一种用于在无线通信系统中识别参考时间点的方法包括：接收第一重复符号序列; 接收第二重复符号序列; 执行所述第一和第二符号序列之间的自相关; 并且将第一和第二重复符号序列之间的自相关空值识别为时间上的参考点。用于在无线通信系统中识别参考点的装置包括：用于接收第一重复符号序列的装置; 用于接收第二重复符号序列的装置; 用于执行所述第一和第二符号序列之间的自相关的装置; 以及用于将所述第一和第二重复符号序列之间的自相关零点识别为所述参考点的装置。

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