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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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2.发明申请公开(公告)号：US20130286962A1
公开(公告)日：2013-10-31
申请号：US13858784
申请日：2013-04-08
IPC分类号： H04W72/04
CPC分类号： H04W72/042 , H04W16/14 , H04W24/00 , H04W24/10 , H04W48/18 , H04W72/0413 , H04W88/06
摘要： Embodiments of a base transceiver station and method for transmitting are described herein. In some embodiments, data is transmitted over a downlink channel in accordance with a selected one of a plurality of transmission modes. The base transceiver station may be configurable to transmit data in accordance with each of the transmission modes. One of the transmissions modes may be selected for the data transmission based at least in part on feedback reported by a subscriber unit. The transmission modes include at least a single antenna mode, a transmit diversity mode, and a spatial multiplexing mode.
摘要翻译： 这里描述了基站收发信机的实施例和传输方法。 在一些实施例中，数据通过下行链路信道根据多个传输模式中选择的一个发送。 基站收发器可以被配置为根据每个传输模式发送数据。 可以至少部分地基于用户单元报告的反馈来选择传输模式之一用于数据传输。 传输模式至少包括单一天线模式，发射分集模式和空间复用模式。
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公开(公告)号：US08428037B2
公开(公告)日：2013-04-23
申请号：US12604350
申请日：2009-10-22
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.
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公开(公告)号：US20100142636A1
公开(公告)日：2010-06-10
申请号：US12604350
申请日：2009-10-22
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。
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公开(公告)号：US20100046429A1
公开(公告)日：2010-02-25
申请号：US12496922
申请日：2009-07-02
IPC分类号： H04W40/00
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.
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。
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公开(公告)号：US07586873B2
公开(公告)日：2009-09-08
申请号：US11101813
申请日：2005-04-07
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。
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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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8.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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10.发明申请MODE SELECTION FOR DATA TRANSMISSION IN WIRELESS COMMUNICATION CHANNELS BASED ON STATISTICAL PARAMETERS 有权基于统计参数的无线通信信道中的数据传输模式选择公开(公告)号：US20110179336A1
公开(公告)日：2011-07-21
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： G06F11/08
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。
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