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11.发明授权公开(公告)号：US07761775B2
公开(公告)日：2010-07-20
申请号：US10884102
申请日：2004-07-01
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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公开(公告)号：USRE40056E1
公开(公告)日：2008-02-12
申请号：US10678053
申请日：2003-10-02
CPC分类号： H04L1/0026 , H01Q1/246 , H01Q3/2605 , H04B7/0669 , H04B7/0673 , H04B7/0697 , H04B7/084 , H04B7/0857 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/06 , 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， 数据被转换成符号并被分配给发送信号TS P，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，度量是在接收时符号的最小欧几里德距离d x min，r x N，在另一个实施例中，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。
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13.发明授权Cellular wireless re-use structure that allows spatial multiplexing and diversity communication 有权蜂窝无线重用结构，允许空间复用和分集通信公开(公告)号：US07209745B1
公开(公告)日：2007-04-24
申请号：US09591015
申请日：2000-06-09
IPC分类号： H04Q7/20
摘要： The present invention includes a cellular wireless re-use communication system. The communication system includes a base transceiver station cluster. The base transceiver station cluster includes a first plurality of base station transceivers and a plurality of common channel areas. Each common channel area includes a unique set of common assigned channels. Each common channel area further includes at least one subscriber unit. Each subscriber unit within the common channel area receives information signals from a second plurality of base station transceivers through one of the set of common assigned channels that correspond to the common channel area. The common assigned channel includes common transmission characteristics. The common transmission characteristic can include a transmission frequency, a transmission time or a transmission code. The second plurality of base station transceivers can be physically located within the same common channel area that a corresponding subscriber unit receiving information from the second plurality of base station transceivers is located. Alternatively, at least one of the second plurality of base station transceivers can be physically located outside of the common channel area that a corresponding subscriber unit receiving information from the second plurality of base station transceivers is located.
摘要翻译： 本发明包括蜂窝无线重用通信系统。 通信系统包括基站收发器群集。 基站收发机集群包括第一多个基站收发机和多个公共信道区域。 每个公共信道区域包括一组唯一的公共分配信道。 每个公共信道区域还包括至少一个用户单元。 公共信道区域内的每个用户单元通过与公共信道区域对应的一组公共分配的信道之一从第二多个基站收发信机接收信息信号。 公共分配的信道包括公共传输特性。 公共传输特性可以包括传输频率，传输时间或传输码。 第二组多个基站收发机可以物理地位于相应的公共信道区域内，相应的用户单元从第二多个基站收发器接收信息。 或者，第二多个基站收发机中的至少一个可以物理地位于公共信道区域外部，相应的用户单元从第二多个基站收发器接收信息所在的位置。
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公开(公告)号：US06862272B2
公开(公告)日：2005-03-01
申请号：US09729886
申请日：2000-12-04
CPC分类号： H04W56/006 , H04B7/022
摘要： The invention includes an apparatus and a method for transmitting sub-protocol data units from a plurality of base transceiver stations to a subscriber unit. The method includes estimating time delays required for transferring the sub-protocol data units between a scheduler unit and each of the base transceiver stations. The method further includes the scheduler unit generating a schedule of time slots and frequency blocks in which the sub-protocol data units are to be transmitted from the base transceiver stations to the subscriber unit. The time delays are used to generate the schedule. The time delays can be used to generate a look ahead schedule that compensates for the timing delays of the sub-protocol data units from the scheduler unit to the base transceiver stations. The sub-protocol data units are wirelessly transmitted from the base transceiver stations to the subscriber unit according to the schedule. The time delays can be estimated by time-stamping sub-protocol data units before sub-protocol data units are transferred from the scheduler unit to the base transceiver stations, and estimating the time delays by comparing the times the sub-protocol data units are actually received by the base transceiver stations with the time-stamping.
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15.发明授权Diversity transmitter based on linear transform processing of transmitted information 有权基于传输信息的线性变换处理的分集发射机公开(公告)号：US06442214B1
公开(公告)日：2002-08-27
申请号：US09574498
申请日：2000-05-19
IPC分类号： H04L2704
CPC分类号： H04B7/0854 , H04B7/10 , H04B7/12 , H04L27/2602
摘要： The present invention provides a diversity transmission system. The diversity transmission system includes a diversity transmitter receiving incoming symbols. The diversity transmitter includes at least one transmitter antenna transmitting a plurality of multi-carrier modulated signals. Each multi-carrier-modulated signal includes a corresponding processed symbol sub-block stream. Each symbol of the processed symbol sub-block stream is based on a linear transform of a plurality of incoming symbols. The diversity transmission system further includes a diversity receiver. The diversity receiver includes at least one receiver antenna receiving the plurality of multi-carrier modulated signals after the multi-carrier modulated signals having been modified by transmission channels between the transmitter antennas and the receiver antenna. The diversity receiver further includes at least one multi-carrier demodulator for demodulating the received multi-carrier modulated signals and generating a demodulated symbol stream. A symbol-processing unit receives the demodulated symbol stream and generates a stream of outgoing symbols. The invention also includes a diversity transmitter. The diversity transmitter includes a symbol-processing unit for receiving a stream of incoming symbols and generating a plurality of processed symbol streams. The processed symbol streams are based on linear transforms of the incoming symbols. A plurality of multi-carrier modulators generate a plurality of multiple-carrier modulated signals. Each multi-carrier modulator receives a corresponding processed symbol stream and generates a multiple-carrier-modulated signal based on the corresponding processed symbol stream.
摘要翻译： 本发明提供一种分集传输系统。 分集传输系统包括接收输入符号的分集发射机。 分集发射机包括发送多个多载波调制信号的至少一个发射机天线。 每个多载波调制信号包括相应的处理符号子块流。 经处理的符号子块流的每个符号基于多个输入符号的线性变换。 分集传输系统还包括分集接收机。 分集接收机包括至少一个在多载波调制信号已被发射机天线和接收机天线之间的传输信道修改的接收多载波调制信号的接收天线。 分集接收机还包括至少一个多载波解调器，用于解调所接收的多载波调制信号并产生解调符号流。 符号处理单元接收解调的符号流并产生输出符号流。 本发明还包括分集发射机。 分集发射机包括用于接收输入符号流并生成多个经处理符号流的符号处理单元。 经处理的符号流基于输入符号的线性变换。 多个多载波调制器产生多个多载波调制信号。 每个多载波调制器接收对应的经处理符号流，并且基于对应的经处理符号流生成多载波调制信号。
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公开(公告)号：US5471647A
公开(公告)日：1995-11-28
申请号：US046631
申请日：1993-04-14
CPC分类号： H04B7/0626 , H01Q3/2605 , H04B1/126 , H04B7/0617
摘要： A method is disclosed for using feedback signals (32) to optimize the directional properties of information signals (19) with respect to their intended receivers (16), where information signals (19) are applied to the transmitting elements (14) of a transmitting antenna array (12). Feedback signals (32) generated at receivers (16) by probing signals (17) are monitored, and the weight matrix with which signals (17) are distributed among array elements (14) is adjusted according to feedback signals (32) to minimize cross-talk. Information signals (18) transmitted according to an optimized weight matrix will also have reduced cross-talk. A weight matrix may be optimized by perturbing an initial weight matrix, calculating an error function from the feedback signals (32) produced by each perturbed weight matrix, estimating the direction of an extremum from the error functions, and adjusting the initial weight matrix in that direction. Alternatively, a gain matrix for the transmitting array may be explicitly determined by sequentially exciting each transmitting element (14) and measuring the resultant feedback signals (32). These are then used to calculate the weight matrix that eliminates cross-talk.
摘要翻译： 公开了一种用于使用反馈信号（32）来优化信息信号（19）相对于其预期接收器（16）的定向属性的方法，其中将信息信号（19）应用于发送元件（14）的发送元件（14） 天线阵列（12）。 监视在接收器（16）处通过探测信号（17）产生的反馈信号（32），并且根据反馈信号（32）调整在阵列元件（14）内分布信号（17）的加权矩阵，以最小化交叉 -谈论。 根据优化的权重矩阵传输的信息信号（18）也将减少串扰。 可以通过扰乱初始权重矩阵来优化权重矩阵，从由每个扰动权重矩阵产生的反馈信号（32）计算误差函数，从误差函数估计极值的方向，并且调整初始权重矩阵 方向。 或者，可以通过顺序激励每个发射元件（14）并测量所得到的反馈信号（32）来明确地确定用于发射阵列的增益矩阵。 然后将它们用于计算消除串扰的权重矩阵。
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公开(公告)号：US4965732A
公开(公告)日：1990-10-23
申请号：US116094
申请日：1987-11-02
CPC分类号： G01S3/8006 , G01S3/14 , G01S3/74 , G01S3/802 , G06K9/0057
摘要： The invention described herein 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 configurations 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： 本文描述的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。
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公开(公告)号：US20130176968A1
公开(公告)日：2013-07-11
申请号：US13781048
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.
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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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20.发明授权公开(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。
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