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11. 发明授权

US08958499B2 Transmitting data over a communications channel 有权
标题翻译：通过通信通道传输数据
公开(公告)号：US08958499B2
公开(公告)日：2015-02-17
申请号：US12997831
申请日：2010-07-16
申请人： Robert W. Heath, Jr. , Takao Inoue
发明人： Robert W. Heath, Jr. , Takao Inoue
IPC分类号： H04L25/49 , H04L27/00 , H04L25/03 , H04L5/00
CPC分类号： H04L25/03961 , H04L5/0023 , H04L25/03949
摘要： Techniques for transmitting data over a communications channel are generally described. A value of a property of an inverse of a channel matrix corresponding to the communications channel may be calculated and compared to a threshold value. If the value of the property a first one of greater than or less than the threshold value, at least one transmit message may be altered using a vector perturbation technique to generate data symbols and the data symbols may be precoded using a channel inversion technique to generate precoded data symbols. If the value of the property is the other of greater than or less than the threshold value, the at least one transmit message may be precoded using a channel inversion technique to generate precoded data symbols.
摘要翻译：通常描述通过通信信道发送数据的技术。可以计算与通信信道相对应的信道矩阵的逆的属性的值，并将其与阈值进行比较。如果属性的值大于或小于阈值，则可以使用向量扰动技术来改变至少一个发送消息以生成数据符号，并且可以使用信道反演技术对数据符号进行预编码以产生预编码数据符号。如果属性的值是大于或小于阈值的另一个，则可以使用信道反转技术对至少一个发送消息进行预编码，以生成预编码的数据符号。

12. 发明授权

US08565331B2 Inserting and decoding replicated data symbols in wireless communications 有权
标题翻译：在无线通信中插入和解码复制数据符号
公开(公告)号：US08565331B2
公开(公告)日：2013-10-22
申请号：US12999029
申请日：2010-08-20
申请人： Ali Yazdan Panah , Robert W. Heath, Jr.
发明人： Ali Yazdan Panah , Robert W. Heath, Jr.
IPC分类号： H04B7/02
CPC分类号： H04B7/0413 , H04B7/0669 , H04L1/0631 , H04L1/0643 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/0226
摘要： Examples are generally described that include transmission methods including inserting at least a portion of data from a first data stream into a second data stream to be transmitted over a communications channel. On receipt of the two data streams, examples of receiving methods include receiving the replicated data, decoding the replicated data using an estimated channel matrix, and generating an updated estimate of the channel matrix based, at least in part, on the replicated data.
摘要翻译：通常描述包括传输方法的示例，包括将来自第一数据流的数据的至少一部分插入到要通过通信信道发送的第二数据流。在接收到两个数据流时，接收方法的示例包括接收复制数据，使用估计的信道矩阵对复制数据进行解码，以及至少部分地基于复制数据生成更新的信道矩阵估计。

13. 发明授权

US06678253B1 Subscriber unit incorporating spatial multiplexing 有权
标题翻译：采用空间复用的用户单元
公开(公告)号：US06678253B1
公开(公告)日：2004-01-13
申请号：US09545434
申请日：2000-04-07
申请人： Robert W. Heath, Jr. , Peroor K. Sebastian , Rahul Chopra , Arogyaswami J. Paulraj
发明人： Robert W. Heath, Jr. , Peroor K. Sebastian , Rahul Chopra , Arogyaswami J. Paulraj
IPC分类号： H04L1216
CPC分类号： H04W16/12 , H04B7/0613 , H04B7/2612 , H04W16/02 , H04W16/24 , H04W16/28 , H04W28/12 , H04W36/00 , H04W72/0446 , H04W74/04 , H04W80/00 , H04W84/042 , H04W88/02 , H04W88/08
摘要： The present invention provides methods and apparatus for implementing spatial multiplexing in conjunction with the one or more multiple access protocols during the broadcast of information in a wireless network. A subscriber unit for use in a cellular system is disclosed. The subscriber unit includes: spatially separate receivers, a spatial processor, and a combiner. The spatially separate receivers receive the assigned channel composite signals resulting from the spatially separate transmission of the subscriber downlink datastream(s). The spatial processor is configurable in response to a control signal transmitted by the base station to separate the composite signals into estimated substreams based on information obtained during the transmission of known data patterns from at least one of the base stations. The spatial processor signals the base stations when a change of a spatial transmission configuration is required. The combiner combines the estimated substreams into a corresponding subscriber datastream.
摘要翻译：本发明提供了在无线网络中的信息广播期间结合一个或多个多址协议来实现空间复用的方法和装置。公开了一种用于蜂窝系统的用户单元。用户单元包括：空间分离的接收机，空间处理器和组合器。空间分离的接收机接收由订户下行链路数据流的空间分离传输产生的分配的信道复合信号。空间处理器可以响应于由基站发送的控制信号来配置，以基于从至少一个基站传输已知数据模式期间获得的信息将复合信号分离成估计的子流。当需要空间传输配置的改变时，空间处理器向基站发信号。组合器将估计的子流组合成相应的用户数据流。

14. 发明授权

US07606204B2 Subscriber unit in a hybrid link incorporating spatial multiplexing 有权
标题翻译：包含空间复用的混合链路中的用户单元
公开(公告)号：US07606204B2
公开(公告)日：2009-10-20
申请号：US10322244
申请日：2002-12-17
申请人： Peroor K. Sebastian , Robert W. Heath, Jr. , Arogyaswami J. Paulraj
发明人： Peroor K. Sebastian , Robert W. Heath, Jr. , Arogyaswami J. Paulraj
IPC分类号： H04Q7/00
CPC分类号： H04W16/12 , H04B7/0613 , H04B7/2612 , H04W16/02 , H04W16/24 , H04W16/28 , H04W28/12 , H04W36/00 , H04W72/0446 , H04W74/04 , H04W80/00 , H04W84/042 , H04W88/02 , H04W88/08
摘要： The present invention provides methods and apparatus for implementing spatial multiplexing in conjunction with the one or more multiple access protocols during the broadcast of information in a wireless network. A subscriber unit for use in a cellular system is disclosed. The subscriber unit includes a plurality of spatially separate antennas and a transmitter for transmitting a plurality of substreams of a datastream on an assigned channel or slot of a multiple access protocol. The transmitter is arranged to apply each substream to an associated one of the spatially separate antennas.
摘要翻译：本发明提供了在无线网络中的信息广播期间结合一个或多个多址协议来实现空间复用的方法和装置。公开了一种用于蜂窝系统的用户单元。用户单元包括多个空间分离的天线和用于在多址协议的分配的信道或时隙上发送数据流的多个子流的发射机。发射器被布置成将每个子流应用到相关联的一个空间分离的天线。

15. 发明授权

US07586873B2 Wireless communications system that supports multiple modes of operation 有权
标题翻译：支持多种操作模式的无线通信系统
公开(公告)号：US07586873B2
公开(公告)日：2009-09-08
申请号：US11101813
申请日：2005-04-07
申请人： Robert W. Heath, Jr. , Rajeev Krishnamoorthy , Peroor K. Sebastian , Arogyaswami J. Paulraj
发明人： Robert W. Heath, Jr. , Rajeev Krishnamoorthy , Peroor K. Sebastian , Arogyaswami J. Paulraj
IPC分类号： H04W4/00 , H04B7/216 , H04H20/67
CPC分类号： H04W72/042 , H04W16/14 , H04W24/00 , H04W24/10 , H04W48/18 , H04W72/0413 , H04W88/06
摘要： A wireless communications adapts its mode of operation between spatial multiplexing and non-spatial multiplexing in response to transmission-specific variables. An embodiment of a wireless communications system for transmitting information between a base transceiver station and a subscriber unit includes mode determination logic. The mode determination logic is in communication with the base transceiver station and the subscriber unit. The mode determination logic determines, in response to a received signal, if a subscriber datastream should be transmitted between the base transceiver station and the subscriber unit utilizing spatial multiplexing or non-spatial multiplexing. In an embodiment, the mode determination logic has an input for receiving a measure of a transmission characteristic related to the received signal. In an embodiment, the mode determination logic includes logic for comparing the measured transmission characteristic to a transmission characteristic threshold and for selecting one of spatial multiplexing and non-spatial multiplexing in response to the comparison of the measured transmission characteristic to the transmission characteristic threshold. In an embodiment, the transmission characteristic includes at least one of delay spread, post-processing signal-to-noise ratio, cyclical redundancy check (CRC) failure, residual inter-symbol interference, mean square error, coherence time, and path loss. By adapting the mode of operation in response to transmission-specific variables, the use of spatial multiplexing can be discontinued in unfavorable conditions. Additionally, because the wireless communications system can adapt its mode of operation between spatial multiplexing and non-spatial multiplexing, the communications system is compatible with both subscriber units that support spatial multiplexing and subscriber units that do not support spatial multiplexing.
摘要翻译：无线通信响应于传输特定变量，适应其在空间复用和非空间复用之间的操作模式。用于在基站和用户单元之间发送信息的无线通信系统的实施例包括模式确定逻辑。模式确定逻辑与基站收发台和用户单元通信。模式确定逻辑响应于接收到的信号，确定在基站收发台和订户单元之间是否应使用空间复用或非空间复用来发送订户数据流。在一个实施例中，模式确定逻辑具有用于接收与所接收信号相关的传输特性的度量的输入。在一个实施例中，模式确定逻辑包括用于将所测量的传输特性与传输特性阈值进行比较并用于响应于测量的传输特性与传输特性阈值的比较来选择空间复用和非空间复用之一的逻辑。在一个实施例中，传输特性包括延迟扩展，后处理信噪比，循环冗余校验（CRC）故障，残余符号间干扰，均方误差，相干时间和路径损耗中的至少一个。通过适应传输特定变量的操作模式，可以在不利条件下停止使用空间复用。此外，由于无线通信系统能够适应空间复用和非空间复用之间的操作模式，所以通信系统与支持空间复用的两个用户单元和不支持空间复用的用户单元兼容。

16. 发明授权

US06757265B1 Subscriber unit in a hybrid link incorporating spatial multiplexing 有权
标题翻译：包含空间复用的混合链路中的用户单元
公开(公告)号：US06757265B1
公开(公告)日：2004-06-29
申请号：US09564770
申请日：2000-05-03
申请人： Peroor K. Sebastian , Robert W. Heath, Jr. , Arogyaswami J. Paulraj
发明人： Peroor K. Sebastian , Robert W. Heath, Jr. , Arogyaswami J. Paulraj
IPC分类号： H04B7204
CPC分类号： H04W16/12 , H04B7/0613 , H04B7/2612 , H04W16/02 , H04W16/24 , H04W16/28 , H04W40/02 , H04W74/04 , H04W80/00 , H04W84/042 , H04W88/02 , H04W88/08
摘要： The present invention provides methods and apparatus for implementing spatial multiplexing in conjunction with the one or more multiple access protocols during the broadcast of information in a wireless network. A subscriber unit for use in a cellular system is disclosed. The subscriber unit includes a plurality of spatially separate antennas and a transmitter for transmitting a plurality of substreams of a datastream on an assigned channel or slot of a multiple access protocol. The transmitter is arranged to apply each substream to an associated one of the spatially separate antennas.
摘要翻译：本发明提供了在无线网络中的信息广播期间结合一个或多个多址协议来实现空间复用的方法和装置。公开了一种用于蜂窝系统的用户单元。用户单元包括多个空间分离的天线和用于在多址协议的分配的信道或时隙上发送数据流的多个子流的发射机。发射器被布置成将每个子流应用到相关联的一个空间分离的天线。

17. 发明授权

US06377636B1 Method and wireless communications system using coordinated transmission and training for interference mitigation 失效
标题翻译：方法和无线通信系统采用协调传输和训练进行干扰减轻
公开(公告)号：US06377636B1
公开(公告)日：2002-04-23
申请号：US09432295
申请日：1999-11-02
申请人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr.
发明人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr.
IPC分类号： H04L100
CPC分类号： H04B7/0842 , H04B7/086 , H04L1/06
摘要： A method for interference mitigation in a wireless communication system having multiple transmitters and receivers by introducing transmission time delays between the transmission of signals from the individual transmitters to ensure coherent reception of the signals at a specific point in the coverage area, such as at a center of distribution of the receivers. To further aid in interference mitigation the signals are assigned training patterns chosen to be distinguishable by the receiver and to optimize interference mitigation. The training patterns can be selected based on a feedback parameter, e.g., a measure of the quality of interference mitigation obtained from the receiver. The present method can be used in wireless communication systems which re-use frequencies including TDMA, CDMA, FDMA, OFDMA or other multiplex communication systems using a multiple access method or a combination of such methods.
摘要翻译：一种用于具有多个发射机和接收机的无线通信系统中的干扰减轻的方法，其通过在来自各个发射机的信号的传输之间引入传输时间延迟，以确保覆盖区域中的特定点处的信号的相干接收，例如在中心的接收机的分配。为了进一步帮助干扰减轻，信号被分配训练模式，所选择的训练模式被接收机区分，并优化干扰减轻。可以基于反馈参数来选择训练模式，例如，从接收器获得的干扰抑制的质量的度量。本方法可以用于使用多址接入方法或这些方法的组合重复使用包括TDMA，CDMA，FDMA，OFDMA或其他多路复用通信系统的频率的无线通信系统。

18. 发明授权

US06377632B1 Wireless communication system and method using stochastic space-time/frequency division multiplexing 失效
标题翻译：使用随机时空/频分复用的无线通信系统和方法
公开(公告)号：US06377632B1
公开(公告)日：2002-04-23
申请号：US09490698
申请日：2000-01-24
申请人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr. , Shilpa Talwar , Helmut Bölcskei
发明人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr. , Shilpa Talwar , Helmut Bölcskei
IPC分类号： H04B706
CPC分类号： H04B7/0669 , H04B7/0671 , H04L1/0606 , H04L1/0625 , H04L5/0023
摘要： A method and apparatus for wireless transmission of a digital bit stream. The present method employs diversity techniques to minimize multipath fading. Digital bits are converted into symbols and the symbols are provided to a number of diversity branches. Each diversity branch has its own antenna. The symbols sent to each diversity branch may be multiplied by a different phase factor or amplitude factor. The phase factors and amplitude factors may be randomly selected. Also, wireless channels can be monitored for channel quality. In this case, the channel quality measurements are used to select the phase factors and the amplitude factors. Also, the symbols can be grouped into frames before transmission. In this case, the frames can be multiplied by matrices comprising phase factors and amplitude factors. Also in this case, the frames can undergo cyclic shifting, which provides an additional measure of diversity.
摘要翻译：一种用于数字比特流的无线传输的方法和装置。本方法采用分集技术来最小化多路径衰落。数字位被转换为符号，符号被提供给多个分集分支。每个分集分支都有自己的天线。发送到每个分集支路的符号可以乘以不同的相位因子或振幅因子。可以随机选择相位因子和振幅因子。此外，可以监控无线信道的信道质量。在这种情况下，通道质量测量用于选择相位因子和振幅因子。此外，符号可以在传输之前被分组成帧。在这种情况下，帧可以乘以包括相位因子和幅度因子的矩阵。同样在这种情况下，帧可以经历循环移位，这提供了多样性的附加度量。

19. 发明授权

US6067290A Spatial multiplexing in a cellular network 有权
公开(公告)号：US6067290A
公开(公告)日：2000-05-23
申请号：US364146
申请日：1999-07-30
申请人： Arogyaswami J. Paulraj , Robert W. Heath, Jr. , Peroor K. Sebastian , David J. Gesbert
发明人： Arogyaswami J. Paulraj , Robert W. Heath, Jr. , Peroor K. Sebastian , David J. Gesbert
IPC分类号： H04B7/06 , H04B7/26 , H04L12/28 , H04L12/56 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04W28/12 , H04W36/00 , H04W74/04 , H04W80/00 , H04W84/04 , H04W88/02 , H04W88/08 , H04Q7/28 , H03D3/22 , H04B7/185 , H04B7/216
CPC分类号： H04W16/12 , H04B7/0613 , H04B7/2612 , H04W16/02 , H04W28/12 , H04W88/08 , H04W16/24 , H04W16/28 , H04W36/00 , H04W72/0446 , H04W74/04 , H04W80/00 , H04W84/042 , H04W88/02
摘要： The present invention provides methods and apparatus for implementing spatial multiplexing in conjunction with the one or more multiple access protocols during the broadcast of information in a wireless network. A wireless cellular network for transmitting subscriber datastream(s) to corresponding ones among a plurality of subscriber units located within the cellular network is disclosed. The wireless cellular network includes base stations and a logic. The base stations each include spatially separate transmitters for transmitting, in response to control signals, selected substreams of each subscriber datastream on an assigned channel of a multiple access protocol. The logic communicates with each of the base stations. The logic assigns an available channel on which to transmit each subscriber datastream. The logic routes at least a substream of each datastream to at least a selected one of the base stations. The logic also generates control signals to configure the at least a selected one of the base stations to transmit the selected substreams to a corresponding one among the plurality of subscriber units on the assigned channel. A subscriber unit for use in a cellular system is also disclosed. The subscriber unit includes: spatially separate receivers, a spatial processor, and a combiner. The spatially separate receivers receive the assigned channel composite signals resulting from the spatially separate transmission of the subscriber downlink datastream(s). The spatial processor is configurable in response to a control signal transmitted by the base station to separate the composite signals into estimated substreams based on information obtained during the transmission of known data patterns from at least one of the base stations. The spatial processor signals the base stations when a change of a spatial transmission configuration is required. The combiner combines the estimated substreams into a corresponding subscriber datastream.

20. 发明授权

US08711961B2 Communicating channel state information using predictive vector quantization 有权
标题翻译：使用预测矢量量化来通信信道状态信息
公开(公告)号：US08711961B2
公开(公告)日：2014-04-29
申请号：US12836843
申请日：2010-07-15
申请人： Robert W. Heath, Jr. , Takao Inoue
发明人： Robert W. Heath, Jr. , Takao Inoue
IPC分类号： H04B7/02
CPC分类号： H04B7/0626 , H04B7/0639 , H04B7/0663
摘要： Techniques are generally described here for communicating channel state information using predictive vector quantization. In some examples, a method may include measuring channel state information based, at least in part, on signals received over a communications channel. An error vector may be calculated between the measured channel state information and predicted channel state information. The error vector may be quantized, and subsequent channel state information may be predicted based, at least in part, on the quantized error vector.
摘要翻译：这里一般地描述了使用预测矢量量化来传送信道状态信息的技术。在一些示例中，方法可以包括至少部分地基于通过通信信道接收的信号来测量信道状态信息。可以在测量的信道状态信息和预测信道状态信息之间计算误差向量。可以量化误差向量，并且可以至少部分地基于量化误差向量来预测后续信道状态信息。

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