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1.发明授权Method of optimizing wireless communication links using stored channel characteristics of different locations 失效使用不同位置的存储信道特性来优化无线通信链路的方法公开(公告)号：US07333774B2
公开(公告)日：2008-02-19
申请号：US10962201
申请日：2004-10-07
CPC分类号： H04B1/7115 , H04B1/7117 , H04B17/21 , H04B17/309
摘要： Techniques for location-assisted wireless communication use real-time location(s) of wireless transceiver(s) together with stored location-indexed channel information to improve communication over a wireless channel between the transceiver(s). The stored channel information includes channel characteristics (e.g., average power, angle-of-arrival, and time delay of multipath components) that are substantially constant in time but vary gradually as a function of location. Current transceiver location(s) are obtained and used to retrieve stored channel characteristics corresponding to the location(s). The channel information may be used at either or both transceiver(s) to improve reception and/or transmission of signals propagating over the wireless channel. For example, reception may be improved by using path angle information to perform spatially structured reception, or using path delay information to perform temporally structured reception, e.g., to assign fingers to multipath components in a RAKE receiver and/or to track time delays of multipath components.
摘要翻译： 用于位置辅助无线通信的技术使用无线收发器的一些或多个实时位置以及存储的位置索引信道信息，以改善通过收发信机之间的无线信道的通信。 所存储的信道信息包括在时间上基本上是恒定的但随着位置的函数而逐渐变化的信道特性（例如，平均功率，到达角度和多径分量的时间延迟）。 获得当前收发器位置并用于检索对应于位置的存储的信道特性。 信道信息可以在两个或两个收发器中使用，以改善在无线信道上传播的信号的接收和/或传输。 例如，可以通过使用路径角度信息来执行空间结构化接收，或者使用路径延迟信息来执行时间上结构化的接收，例如，将手指分配给RAKE接收机中的多路分量和/或跟踪多径的时间延迟，可以改善接收 组件。
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公开(公告)号：US20130176966A1
公开(公告)日：2013-07-11
申请号：US13780995
申请日：2013-02-28
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.
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。
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3.发明授权公开(公告)号：US07921349B2
公开(公告)日：2011-04-05
申请号：US12823267
申请日：2010-06-25
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。 最初以初始模式发送数据，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，使后续模式选择更快更有效。 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。
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公开(公告)号：US07058146B2
公开(公告)日：2006-06-06
申请号：US09876896
申请日：2001-06-06
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.
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5.发明授权公开(公告)号：US06963619B1
公开(公告)日：2005-11-08
申请号：US09621119
申请日：2000-07-21
申请人： David J. Gesbert , Peroor K. Sebastian , Vinko Erceg , Victor Shtrom , Sanjay Kasturia , Arogyaswami J. Paulraj
发明人： David J. Gesbert , Peroor K. Sebastian , Vinko Erceg , Victor Shtrom , Sanjay Kasturia , Arogyaswami J. Paulraj
CPC分类号： H04B7/10
摘要： The present invention includes a wireless communication system. The wireless communication system includes a plurality of transceiver antennae. Each transceiver is spatially separate from at least one other transceiver antenna. Each transceiver antenna includes a transceiver antenna polarization. At least one transceiver antenna has a polarization that is different than at least one other transceiver antenna. Each transceiver antenna transmits a corresponding data stream. The wireless communication system further includes a plurality of receiver antennae. The receiver antennae receive at least one data stream. The transceiver antenna polarization of each transceiver antenna is pre-set to optimize separability of the received data streams. A transmission channel between the transceiver antennae and the receiver antennae can be estimated with a channel matrix. The pre-set transceiver antenna polarization of each transceiver antenna can be determined by minimizing a singular value spread of the channel matrix. A pre-set receiver antenna polarization of each receiver antenna can also be determined by minimizing a singular value spread of the channel matrix.
摘要翻译： 本发明包括无线通信系统。 无线通信系统包括多个收发器天线。 每个收发器在空间上与至少一个其他收发器天线分离。 每个收发天线包括收发天线极化。 至少一个收发天线具有与至少一个其它收发器天线不同的极化。 每个收发天线发送相应的数据流。 无线通信系统还包括多个接收机天线。 接收器天线接收至少一个数据流。 每个收发天线的收发天线极化被预先设定，以优化接收数据流的可分离性。 可以用信道矩阵来估计收发天线和接收机天线之间的传输信道。 可以通过最小化信道矩阵的奇异值扩展来确定每个收发天线的预设收发天线极化。 也可以通过最小化信道矩阵的奇异值扩展来确定每个接收机天线的预设接收机天线极化。
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公开(公告)号：US06937592B1
公开(公告)日：2005-08-30
申请号：US09653060
申请日：2000-09-01
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.
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7.发明授权Increasing capacity in wireless broadcast systems using distributed transmission/directional reception (DTDR) 失效使用分布式发送/定向接收（DTDR）的无线广播系统中的增加容量
公开(公告)号：US5345599A
公开(公告)日：1994-09-06
申请号：US839624
申请日：1992-02-21
CPC分类号： H04H20/18 , H04B7/0848 , H04H20/33 , H04N7/015 , H04N7/127
摘要： A method and apparatus for increasing the capacity of wireless broadcast communications system from a central studio to a plurality of users in a service area is disclosed. Given a source signal whose high information rate exceeds the practical information carrying capacity of the available broadcast channel bandwidth, the invention increases the effective capacity of the broadcast system to effectively communicate such a source signal. The high-rate signal is split into several low-rate signals such that each can be accommodated within the allocated bandwidth. These low-rate signals are transmitted from spatially separated transmitters, all radiating into the service area in the same frequency channel. Each receiver uses a plurality of antennas to receive these multiple cochannel signals that arrive from different directions-of-arrival. The receiver exploits the directions-of-arrival differences of these cochannel signals to separate them into the individually transmitted signals. The separated signals are then demodulated to extract the information signals which are then combined to obtain the original high-rate source signal. Thus, the broadcast information capacity can be increased several-fold.
摘要翻译： 公开了一种用于将无线广播通信系统从中央演播室增加到服务区域中的多个用户的容量的方法和装置。 给定高信息速率超过可用广播信道带宽的实际信息承载能力的源信号，本发明增加了广播系统有效传输这种源信号的有效容量。 高速率信号被分成几个低速率信号，使得每个可以容纳在分配的带宽内。 这些低速率信号从空间分离的发射机发射，全部辐射到同一频道中的服务区域。 每个接收机使用多个天线来接收从到达的不同方向到达的这些多个信道信号。 接收机利用这些同信道信号的到达方向差异将它们分离成单独发送的信号。 然后对分离的信号进行解调以提取然后组合的信息信号，以获得原始的高速率源信号。 因此，广播信息容量可以增加几倍。
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8.发明申请Cooperative OFDMA and distributed MIMO relaying over dense wireless networks 失效在密集无线网络上进行合作的OFDMA和分布式MIMO中继公开(公告)号：US20100278136A1
公开(公告)日：2010-11-04
申请号：US12011203
申请日：2008-01-23
IPC分类号： H04W72/04
CPC分类号： H04W52/241 , H04B7/026 , H04B7/0617 , H04B7/0626 , H04W52/146 , H04W52/265 , H04W72/044 , H04W88/04
摘要： A method for wireless communication combines OFDMA resource allocation and power control policies with cooperative relaying techniques. The techniques are preferably implemented in a dense wireless network of power-limited mobile devices assisted by mobile relay devices having superior power supplies. Preferably, MIMO beamforming techniques are used to further increase energy efficiency and spectral efficiency beyond the increases provided by ODFMA cooperative relaying.
摘要翻译： 无线通信方法将OFDMA资源分配和功率控制策略与合作中继技术相结合。 这些技术优选地在由具有优异电源的移动中继设备辅助的功率受限移动设备的密集无线网络中实现。 优选地，MIMO波束形成技术被用于进一步提高能量效率和频谱效率，超出由ODFMA协作中继提供的增加。
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公开(公告)号：US20100260134A1
公开(公告)日：2010-10-14
申请号：US12823057
申请日：2010-06-24
IPC分类号： H04W72/00
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。
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公开(公告)号：US07773564B2
公开(公告)日：2010-08-10
申请号：US10929015
申请日：2004-08-26
IPC分类号： H04Q7/00
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 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。
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