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1. 发明授权

US08798120B2 Methods and communication systems having adaptive mode selection 有权
标题翻译：具有自适应模式选择的方法和通信系统
公开(公告)号：US08798120B2
公开(公告)日：2014-08-05
申请号：US12727049
申请日：2010-03-18
申请人： Gustavo de Veciana , Hongseok Kim , Chan-Byoung Chae , Robert W. Heath, Jr.
发明人： Gustavo de Veciana , Hongseok Kim , Chan-Byoung Chae , Robert W. Heath, Jr.
IPC分类号： H04B1/38
CPC分类号： H04B7/0877 , H04B7/0417 , H04B7/063 , H04B7/0689 , H04W52/0261 , Y02D70/1262 , Y02D70/1264 , Y02D70/146 , Y02D70/444
摘要： Examples are generally described that include methods for selecting a transmit mode in a communications system. An example method may include calculating a first transmission rate for data in a multiple-input multiple-output mode of the communications system and calculating a second transmission rate for the data in a single-input multiple-output mode of the communications system. A mode may be selected from the group consisting of the multiple-input multiple-output mode and the single-input multiple-output mode based, at least in part, on an energy consumption of the first and second transmission rates. Data may be transmitted from a transceiver in the communications system using the selected mode.
摘要翻译：通常描述包括在通信系统中选择发送模式的方法的示例。示例性方法可以包括为通信系统的多输入多输出模式中的数据计算第一传输速率，并计算通信系统的单输入多输出模式中的数据的第二传输速率。至少部分地基于第一和第二传输速率的能量消耗，从多输入多输出模式和单输入多输出模式中选择模式。可以使用所选择的模式从通信系统中的收发器发送数据。

2. 发明申请

US20130176968A1 Spatial Multiplexing in a Cellular Network 审中-公开
公开(公告)号：US20130176968A1
公开(公告)日：2013-07-11
申请号：US13781048
申请日：2013-02-28
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： H04W72/04
CPC分类号： H04B7/06 , H04B7/0613 , H04B7/2612 , H04B17/309 , H04H20/71 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04W28/12 , H04W36/24 , H04W72/046 , 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.

3. 发明授权

US08428037B2 Wireless communications system that supports multiple modes of operation 有权
公开(公告)号：US08428037B2
公开(公告)日：2013-04-23
申请号：US12604350
申请日：2009-10-22
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
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.

4. 发明授权

US08418033B2 Mode selection for data transmission in wireless communication channels based on statistical parameters 有权
标题翻译：基于统计参数的无线通信信道数据传输模式选择
公开(公告)号：US08418033B2
公开(公告)日：2013-04-09
申请号：US13076999
申请日：2011-03-31
申请人： David J. Gesbert , Severine E. Catreux , Robert W. Heath, Jr. , Peroor K. Sebastian , Arogyaswami J. Paulraj
发明人： David J. Gesbert , Severine E. Catreux , Robert W. Heath, Jr. , Peroor K. Sebastian , Arogyaswami J. Paulraj
IPC分类号： H03M13/00
CPC分类号： H04L1/06 , H04L1/0001 , H04L1/0002 , H04L1/0009 , H04L1/0016 , H04L1/0021 , H04L1/0026 , H04L1/0033 , H04L1/20
摘要： A method and communication system for selecting a mode for encoding data for transmission in a wireless communication channel between a transmit unit and a receive unit. The data is initially transmitted in an initial mode and the selection of the subsequent mode is based on a selection of first-order and second-order statistical parameters of short-term and long-term quality parameters. Suitable short-term quality parameters include signal-to-interference and noise ratio (SINR), signal-to-noise ratio (SNR), power level and suitable long-term quality parameters include error rates such as bit error rate (BER) and packet error rate (PER). The method of the invention can be employed in Multiple Input Multiple Output (MIMO), Multiple Input Single Output (MISO), Single Input Single Output (SISO) and Single Input Multiple Output (SIMO) communication systems to make subsequent mode selection faster and more efficient. Furthermore the method can be used in communication systems employing various transmission protocols including OFDMA, FDMA, CDMA, TDMA.
摘要翻译：一种用于选择用于在发送单元和接收单元之间的无线通信信道中进行数据传输的模式的方法和通信系统。最初以初始模式传输数据，并且随后的模式的选择是基于对短期和长期质量参数的一阶和二阶统计参数的选择。合适的短期质量参数包括信噪比和噪声比（SINR），信噪比（SNR），功率电平和合适的长期质量参数，包括错误率，如误码率（BER）和数据包错误率（PER）。本发明的方法可以用于多输入多输出（MIMO），多输入单输出（MISO），单输入单输出（SISO）和单输入多输出（SIMO）通信系统中，以使后续模式选择更快，更多高效。此外，该方法可以用于采用包括OFDMA，FDMA，CDMA，TDMA的各种传输协议的通信系统。

5. 发明授权

US08339934B2 Spatial multiplexing in a cellular network 有权
标题翻译：蜂窝网络中的空间复用
公开(公告)号：US08339934B2
公开(公告)日：2012-12-25
申请号：US12823057
申请日：2010-06-24
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： H04J11/00
CPC分类号： H04B7/06 , H04B7/0613 , H04B7/2612 , H04B17/309 , H04H20/71 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04W28/12 , H04W36/24 , H04W72/046 , 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。

6. 发明授权

US08130862B2 Precoding system and method for multi-user transmission in multiple antenna wireless systems 有权
标题翻译：多天线无线系统中多用户传输的预编码系统及方法
公开(公告)号：US08130862B2
公开(公告)日：2012-03-06
申请号：US11791090
申请日：2005-11-16
申请人： Antonio Forenza , Robert W. Heath, Jr. , Manish Airy
发明人： Antonio Forenza , Robert W. Heath, Jr. , Manish Airy
IPC分类号： H04B7/00 , H03K9/00 , H04L27/06 , H04L7/00
CPC分类号： H04L27/367 , H04B7/022 , H04B7/0417 , H04B7/0443 , H04B7/0465
摘要： A transmission method and system are provided wherein the system and method use precoding and sum rate optimization beam forming to create a capacity transmission.
摘要翻译：提供了一种传输方法和系统，其中系统和方法使用预编码和和速率优化波束形成来创建容量传输。

7. 发明申请

US20120045007A1 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替换数据符号
公开(公告)号：US20120045007A1
公开(公告)日：2012-02-23
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： H04J11/00
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解码复制数据，以及至少部分地基于复制数据生成更新的信道矩阵估计。

8. 发明申请

US20100142636A1 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：US20100142636A1
公开(公告)日：2010-06-10
申请号：US12604350
申请日：2009-10-22
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： H04K1/10
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。

9. 发明授权

US07636381B2 System and method for distributed input-distributed output wireless communications 有权
标题翻译：分布式输入分布式输出无线通信系统和方法
公开(公告)号：US07636381B2
公开(公告)日：2009-12-22
申请号：US11894540
申请日：2007-08-20
申请人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
发明人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
IPC分类号： H04L27/30
CPC分类号： H04L25/03343 , H04B7/0684 , H04L1/0057 , H04L25/0206 , H04L25/0224 , H04L2025/03414 , H04L2025/0377 , H04L2025/03802
摘要： A system for dynamically adapting the communication characteristics of a multiple antenna system (MAS) with multi-user (MU) transmissions (defined with the acronym MU-MAS), such as a distributed-input distributed-output (DIDO) communication system. For example, a system according to one embodiment of the invention comprises: one or more coding modulation units to encode and modulate information bits for each of a plurality of wireless client devices to produce encoded and modulated information bits; one or more mapping units to map the encoded and modulated information bits to complex symbols; and a MU-MAS or DIDO configurator unit to determine a subset of users and a MU-MAS or DIDO transmission mode based on channel characterization data obtained through feedback from the wireless client devices and to responsively control the coding modulation units and mapping units.
摘要翻译：一种用于通过多用户（MU）传输（由首字母缩略词MU-MAS定义）（例如分布式输入分布式输出（DIDO）通信系统）动态地适应多天线系统（MAS）的通信特性的系统。例如，根据本发明的一个实施例的系统包括：一个或多个编码调制单元，用于编码和调制多个无线客户端设备中的每一个的信息比特以产生编码和调制的信息比特; 一个或多个映射单元将编码和调制的信息比特映射到复数符号; 以及MU-MAS或DIDO配置器单元，用于基于通过来自无线客户端设备的反馈获得的信道表征数据来确定用户子集和MU-MAS或DIDO传输模式，并且响应地控制编码调制单元和映射单元。

10. 发明授权

US07599420B2 System and method for distributed input distributed output wireless communications 有权
标题翻译：分布式输入分布式输出无线通信系统和方法
公开(公告)号：US07599420B2
公开(公告)日：2009-10-06
申请号：US11894394
申请日：2007-08-20
申请人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
发明人： Antonio Forenza , Robert W. Heath, Jr. , Stephen G. Perlman , Roger van der Laan , John Speck
IPC分类号： H04L27/30
CPC分类号： H04L25/03343 , H04B7/0452 , H04B7/0632 , H04B7/0684 , H04B7/0689 , H04B7/10 , H04J11/0033 , H04L1/0057 , H04L25/0206 , H04L25/0224 , H04L27/0014 , H04L27/2646 , H04L27/2657 , H04L27/2675 , H04L2025/03414 , H04L2025/03426 , H04L2025/0377 , H04L2025/03802 , H04L2027/002
摘要： A system and method are described for compensating for frequency and phase offsets in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a method according to one embodiment of the invention comprises: transmitting a training signal from each antenna of a base station to one or each of a plurality of wireless client devices, one or each of the client devices analyzing each training signal to generate frequency offset compensation data, and receiving the frequency offset compensation data at the base station; computing MU-MAS precoder weights based on the frequency offset compensation data to pre-cancel the frequency offset at the transmitter; precoding training signal using the MU-MAS precoder weights to generate precoded training signals for each antenna of the base station; transmitting the precoded training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station; computing a plurality of MU-MAS precoder weights based on the channel characterization data, the MU-MAS precoder weights calculated to pre-cancel frequency and phase offset and/or inter-user interference; precoding data using the MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and transmitting the precoded data signals through each antenna of the base station to each respective client device.
摘要翻译：描述了用于补偿具有多用户（MU）传输（“MU-MAS”）的多天线系统（MAS）中的频率和相位偏移的系统和方法。例如，根据本发明的一个实施例的方法包括：将来自基站的每个天线的训练信号发送到多个无线客户端设备中的一个或每个无线客户端设备，一个或每个客户端设备分析每个训练信号以产生频偏补偿数据，并在基站接收频偏补偿数据; 基于所述频偏补偿数据计算MU-MAS预编码器权重以预先消除所述发射机处的频偏; 使用MU-MAS预编码器权重的预编码训练信号来生成基站的每个天线的预编码训练信号; 将预编码的训练信号从基站的每个天线发送到多个无线客户端设备中的每一个，每个客户端设备分析每个训练信号以产生信道表征数据，以及在基站处接收信道表征数据; 基于所述信道表征数据计算多个MU-MAS预编码器权重，所述MU-MAS预编码器权重被计算为预先消除频率和相位偏移和/或用户间干扰; 使用MU-MAS预编码器权重预编码数据，以生成基站的每个天线的预编码数据信号; 以及通过基站的每个天线将预编码的数据信号发送到每个相应的客户机设备。

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