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。

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。

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。

公开(公告)号：US07272192B2

公开(公告)日：2007-09-18

申请号：US09833543

申请日：2001-04-11

申请人： Erik D. Lindskog ,  Arogyaswami J. Paulraj

发明人： Erik D. Lindskog ,  Arogyaswami J. Paulraj

IPC分类号： H04L23/02 ,  H04L5/12

CPC分类号： H04B7/0669 ,  H04L1/0618

摘要： A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the difference in channels from the transmit antennas to the receiver antenna(s). The way the transmission and reception is organized makes it relatively simple to in the receiver detect the transmitted symbols despite intersymbol interference in the channel. Due to the increased diversity experienced by the receiver the average power level required at the receiver is reduced which can be used to increase the capacity or coverage of a wireless network and/or reduce the required transmitted power.

摘要翻译： 创建了具有符号间干扰的信道的分集发送和接收的方法。 利用这种方法，可以以这样的方式从两个或更多个天线发送，使得具有一个或多个天线的接收机可以从由发射天线到接收机天线的信道差异提供的分集中受益。 组播发送和接收的方式使得在接收机中检测发送的符号，尽管信道中存在码间干扰，但相对简单。 由于接收机经受的增加的分集，减少了接收机所需的平均功率电平，这可以用于增加无线网络的容量或覆盖范围，和/或减少所需的发射功率。

公开(公告)号：US06760882B1

公开(公告)日：2004-07-06

申请号：US09665149

申请日：2000-09-19

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： H03M1300

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。

公开(公告)号：US06400699B1

公开(公告)日：2002-06-04

申请号：US09660246

申请日：2000-09-12

申请人： Manish Airy ,  Baraa Al-Dabagh ,  Jose Tellado ,  Partho Mishra ,  John Fan ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

发明人： Manish Airy ,  Baraa Al-Dabagh ,  Jose Tellado ,  Partho Mishra ,  John Fan ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

IPC分类号： H04Q700

CPC分类号： H04W72/1263 ,  H04B7/0613 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0064

摘要： The invention includes an apparatus and method for scheduling wireless transmission of data blocks between at least one antenna of a base transceiver station and multiple subscriber units. The scheduling can be based on the quality of a transmission link between the base station antennas and the subscriber units, the amount of data requested by the subscriber units, and/or the type of data requested by the subscriber units. The scheduling generally includes assigning frequency blocks and time slots to each of the subscriber units for receiving or transmitting data blocks. The invention includes a method for transmitting data streams between a base transceiver station and a plurality of subscribers. The method includes receiving protocol data units from a network, creating sub-protocol data units from the protocol data units, and once per a frame of time, generating a schedule that designates time slots and pre-defined frequency blocks in which each one of the plurality of subscribers is to receive each of the sub-protocol data units from a plurality of base station transceiver antennas. The invention can further include transmitting the schedule to each of the subscribers, and the plurality of base station transceiver antennas transmitting the sub-protocol data units according to the schedule. The invention can further include selecting at least one transmission mode for each subscriber. The transmission mode dictating the type of modulation and/or coding used during transmission of the sub-protocol data units.

摘要翻译： 本发明包括一种用于在基站收发台的至少一个天线和多个用户单元之间调度数据块的无线传输的装置和方法。 调度可以基于基站天线和用户单元之间的传输链路的质量，用户单元请求的数据量和/或用户单元请求的数据的类型。 调度通常包括向每个用户单元分配频率块和时隙以用于接收或发送数据块。 本发明包括一种在基站和多个用户之间传输数据流的方法。 该方法包括从网络接收协议数据单元，从协议数据单元创建子协议数据单元，并且每一帧一次生成指定时隙的调度和预定义的频率块，其中每个 多个用户将从多个基站收发天线接收每个子协议数据单元。 本发明还可以包括根据日程安排向每个用户以及多个基站收发天线发送该子协议数据单元。 本发明还可以包括为每个用户选择至少一个传输模式。 传输模式指示在子协议数据单元的传输期间使用的调制和/或编码的类型。

公开(公告)号：US06377819B1

公开(公告)日：2002-04-23

申请号：US09544621

申请日：2000-04-06

申请人： David J. Gesbert ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

发明人： David J. Gesbert ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

IPC分类号： H04Q720

CPC分类号： H04B7/04

摘要： A wireless communication system comprises a base transceiver station and R remote transceivers T1 . . . TR, each of the remote transceivers having multiple antennas. The base transceiver station has N base station antennas, each of the remote transceivers has M remote antennas, and N≧R. The base transceiver station simultaneously transmits information signals s1 . . . sR to remote transceivers T1 . . . TR, respectively. The base transceiver station comprises processing means for selecting R discrimination vectors V1 . . . VR, each of the discrimination vectors having N components. The base transceiver station computes an N-component transmission signal vector U as follows: U = ∑ i = 1 R ⁢   ⁢ V i ⁢ s i . The transmission signal vector U is transmitted from the base transceiver station, preferably one component of U per base station antenna. The ith remote transceiver Ti receives an M-component signal vector Zi through its M remote antennas, one component of Zi per antenna. The ith remote transceiver computes a reconstructed signal yi from the received signal vector Zi. The discrimination vectors V1 . . . VR are preferably selected to optimize an efficiency of transmission, and the computation of yi preferably optimizes an efficiency of reception. Some embodiments of the present system and method employ time filtering, and some embodiments use frequency filtering.

摘要翻译： 无线通信系统包括基站收发台和R远程收发器T1。 。 。 TR，每个远程收发器具有多个天线。 基站收发台具有N个基站天线，每个远端收发器具有M个远程天线，N> = R。 基站收发台同时发送信息信号s1。 。 。 sR到远程收发器T1。 。 。 TR。 基站收发台包括用于选择R个鉴别向量V1的处理装置。 。 。 VR，每个鉴别向量具有N个分量。 基站收发台如下计算N分量传输信号向量U：发送信号向量U从基站发送，优选为每个基站天线的一个分量。 第i个远程收发器Ti通过其M个远程天线接收M分量信号矢量Zi，每个天线Zi的一个分量。 第i个远程收发器从接收信号矢量Zi计算重构信号yi。 鉴别向量V1。 。 。 优选选择VR以优化传输效率，并且yi的计算优选地优化接收效率。 本系统和方法的一些实施例采用时间滤波，并且一些实施例使用频率滤波。

公开(公告)号：US06351499B1

公开(公告)日：2002-02-26

申请号：US09464372

申请日：1999-12-15

申请人： Arogyaswami J. Paulraj ,  Peroor K. Sebastian ,  David J. Gesbert ,  Jose Tellado

发明人： Arogyaswami J. Paulraj ,  Peroor K. Sebastian ,  David J. Gesbert ,  Jose Tellado

IPC分类号： H04B702

CPC分类号： H04B7/0891 ,  H01Q1/246 ,  H01Q3/2605 ,  H04B7/0669 ,  H04B7/0673 ,  H04B7/0697 ,  H04B7/0857 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/0606 ,  H04L1/0618

摘要： A method of maximizing a communication parameter, such as data capacity, signal quality or throughput of a channel between a transmit unit with M transmit antennas and a receive unit with N receive antennas and a communication system such as a wireless network (including networks with multiple access techniques such as TDMA, FDMA, CDMA, OFDMA) employing the method. The data is first processed to produce parallel spatial-multiplexed streams SMi, where i=1 . . . k, which are converted or mapped to transmit signals TSp, where p=1 . . . M, assigned for transmission from the M transmit antennas. Corresponding receive signals RSj, where j=1 . . . N, are received by the N receive antennas of the receiver and used to assess a quality parameter, such as a statistical signal parameter including SINR, SNR, power level, level crossing rate, level crossing duration of the signal of a predetermined threshold and reception threshold, or a parameter of the data, such as BER or packet error rate. The quality parameter is used to adaptively adjust k as well as other parameters such as coding and mapping to transmit antennas such that the communication parameter of the channel is maximized.

摘要翻译： 使具有M个发送天线的发送单元和具有N个接收天线的接收单元之间的信道的数据容量，信号质量或吞吐量等通信参数最大化的方法以及诸如无线网络的通信系统（包括具有多个 接入技术，如TDMA，FDMA，CDMA，OFDMA）。 首先处理数据以产生并行空间复用流SMi，其中i = 1。 。 。 k，其被转换或映射到发射信号TSp，其中p = 1。 。 。 M，被分配用于从M个发射天线发射。 相应的接收信号RSj，其中j = 1。 。 。 N由接收机的N个接收天线接收并且用于评估质量参数，诸如包括SINR，SNR，功率电平，电平穿越率，预定阈值的信号的电平穿越持续时间和接收的统计信号参数 阈值或数据的参数，例如BER或分组错误率。 质量参数用于自适应地调整k以及其他参数，例如编码和映射到发射天线，使得信道的通信参数最大化。

公开(公告)号：US06298092B1

公开(公告)日：2001-10-02

申请号：US09585948

申请日：2000-06-02

申请人： Robert W. Heath, Jr. ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

发明人： Robert W. Heath, Jr. ,  Peroor K. Sebastian ,  Arogyaswami J. Paulraj

IPC分类号： H04B706

CPC分类号： H04L1/0026 ,  H01Q1/246 ,  H01Q3/2605 ,  H04B7/0669 ,  H04B7/0673 ,  H04B7/0697 ,  H04B7/084 ,  H04B7/0857 ,  H04B7/0891 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/06 ,  H04L1/0606 ,  H04L1/0618

摘要： The present invention provides a method for controlling a communication parameter in a channel through which data is transmitted between a transmit unit with M transmit antennas and a receive unit with N receive antennas by selecting from among proposed mapping schemes an applied mapping scheme according to which the data is converted into symbols and assigned to transmit signals TSp, p=1 . . . M, which are transmitted from the M transmit antennas. The selection of the mapping scheme is based on a metric; in one embodiment the metric is a minimum Euclidean distance dmin,rx of the symbols when received, in another embodiment the metric is a probability of error P(e) in the symbol when received. The method can be employed in communication systems using multi-antenna transmit and receive units of various types including wireless systems, e.g., cellular communication systems, using multiple access techniques such as TDMA, FDMA, CDMA and OFDMA.

摘要翻译： 本发明提供了一种用于控制信道中的通信参数的方法，通过该通道参数在具有M个发送天线的发送单元和具有N个接收天线的接收单元之间通过其从所提供的映射方案中选择应用的映射方案来传送数据， 数据被转换为符号并被分配给发送信号TSp，p = 1。 。 。 M，其从M个发射天线发射。 映射方案的选择基于度量; 在一个实施例中，度量是接收时符号的最小欧几里德距离d min，在另一实施例中，度量是在接收时符号中的错误概率P（e）。 该方法可以用于使用各种类型的多天线发射和接收单元的通信系统，包括使用诸如TDMA，FDMA，CDMA和OFDMA之类的多种接入技术的无线系统，例如蜂窝通信系统。

公开(公告)号：US4750147A

公开(公告)日：1988-06-07

申请号：US795623

申请日：1985-11-06

申请人： Richard H. Roy, III ,  Arogyaswami J. Paulraj ,  Thomas Kailath

发明人： Richard H. Roy, III ,  Arogyaswami J. Paulraj ,  Thomas Kailath

IPC分类号： G01S3/14 ,  G01S3/74 ,  G01S3/80 ,  G01S3/802 ,  G06K9/00 ,  G06G7/48

CPC分类号： G06K9/0057 ,  G01S3/14 ,  G01S3/74 ,  G01S3/8006 ,  G01S3/802

摘要： The invention relates generally to the field of signal processing for signal reception and parameter estimation. The invention has many applications such as frequency estimation and filtering, and array data processing, etc. For convenience, only applications of this invention to sensor array processing are described herein. The array processing problem addressed is that of signal parameter and waveform estimation utilizing data collected by an array of sensors. Unique to this invention is that the sensor array geometry and individual sensor characteristics need not be known. Also, the invention provides substantial advantages in computations and storage over prior methods. However, the sensors must occur in pairs such that the paired elements are identical except for a displacement which is the same for all pairs. These element pairs define two subarrays which are identical except for a fixed known displacement. The signals must also have a particular structure which in direction-of-arrival estimation applications manifests itself in the requirement that the wavefronts impinging on the sensor array be planar. Once the number of signals and their parameters are estimated, the array configuration can be determined and the signals individually extracted. The invention is applicable in the context of array data processing to a number of areas including cellular mobile communications, space antennas, sonobuoys, towed arrays of acoustic sensors, and structural analysis.

摘要翻译： 本发明一般涉及用于信号接收和参数估计的信号处理领域。 本发明具有诸如频率估计和滤波以及阵列数据处理等的许多应用。为了方便起见，本文仅描述了本发明对传感器阵列处理的应用。 解决的阵列处理问题是使用由传感器阵列收集的数据的信号参数和波形估计。 本发明的独特之处在于传感器阵列的几何形状和单独的传感器特性不需要知道。 此外，本发明在计算和存储方面比现有方法提供了显着的优点。 然而，传感器必须成对出现，使得成对的元件是相同的，除了对于所有对相同的位移。 这些元素对定义了两个除了固定的已知位移之外的相同的子阵列。 信号还必须具有特定的结构，其在到达方向估计应用中表现为要求波导入射在传感器阵列上是平面的。 一旦估计了信号数量及其参数，就可以确定阵列配置并单独提取信号。 本发明可应用于包括蜂窝移动通信，空间天线，声纳，拖曳声学传感器阵列和结构分析在内的多个领域的阵列数据处理的上下文。