公开(公告)号：US20060291582A1

公开(公告)日：2006-12-28

申请号：US11478878

申请日：2006-06-30

申请人： Jay Walton ,  John Ketchum

发明人： Jay Walton ,  John Ketchum

IPC分类号： H04L1/02

CPC分类号： H04B7/0417 ,  H04B7/0439 ,  H04B7/0615 ,  H04B7/0632 ,  H04B7/0647 ,  H04B7/0891 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0019 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0091 ,  H04L5/023 ,  H04L5/06 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/0248 ,  H04L25/03159 ,  H04L25/03343 ,  H04L27/2608 ,  H04L2001/0096 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/24 ,  H04W52/346 ,  H04W52/42

摘要： Techniques to process data for transmission over multiple transmission channels. The available transmission channels are segregated into one or more groups, and the channels in each group are selected for use for data transmission. Data for each group is coded and modulated based on a particular coding and modulation scheme to provide modulation symbols, and the modulation symbols for each selected channel are weighted based on an assigned weight. The weighting “inverts” the selected channels such that they achieve similar received SNRs. With selective channel inversion, only “good” channels in each group having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power for the group is distributed across the good channels in the group. Improved performance is achieved by using only good channels in each group and matching each selected channel's received SNR to the required SNR.

公开(公告)号：US20060193268A1

公开(公告)日：2006-08-31

申请号：US11401758

申请日：2006-04-10

申请人： Jay Walton ,  John Ketchum

发明人： Jay Walton ,  John Ketchum

IPC分类号： H04L12/16 ,  H04Q11/00

CPC分类号： H04L5/0028 ,  H04B7/04 ,  H04B7/0669 ,  H04B7/0678 ,  H04B7/0697 ,  H04L1/0001 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0023

摘要： Techniques for transmitting data using a number of diversity transmission modes to improve reliability. At a transmitter, for each of one or more data streams, a particular diversity transmission mode is selected for use from among a number of possible transmission modes. These transmission modes may include a frequency diversity transmission mode, a Walsh diversity transmission mode, a space time transmit diversity (STTD) transmission mode, and a Walsh-STTD transmission mode. Each diversity transmission mode redundantly transmits data over time, frequency, space, or a combination thereof. Each data stream is coded and modulated to provide modulation symbols, which are further processed based on the selected diversity transmission mode to provide transmit symbols. For OFDM, the transmit symbols for all data streams are further OFDM modulated to provide a stream of transmission symbols for each transmit antenna used for data transmission.

公开(公告)号：US20060067421A1

公开(公告)日：2006-03-30

申请号：US11217818

申请日：2005-09-01

申请人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

发明人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

IPC分类号： H04L1/02

CPC分类号： H04L1/0668 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0667 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/12 ,  H04J13/004 ,  H04L1/0041 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0637 ,  H04L5/0023 ,  H04L27/2626

摘要： Techniques for transmitting data using a combination of transmit diversity schemes are described. These transmit diversity schemes include spatial spreading, continuous beamforming, cyclic delay diversity, space-time transmit diversity (STTD), space-frequency transmit diversity (SFTD), and orthogonal transmit diversity (OTD). A transmitting entity processes one or more (ND) data symbol streams based on a transmit diversity scheme (e.g., STTD, SFTD, or OTD) to generate multiple (NC) coded symbol streams. Each data symbol stream may be sent as a single coded symbol stream or as multiple (e.g., two) coded symbol streams using STTD, SFTD, or OTD. The transmitting entity may perform spatial spreading on the NC coded symbol streams with different matrices to generate multiple (NT) transmit symbol streams for transmission from NT antennas. Additionally or alternatively, the transmitting entity may perform continuous beamforming on the NT transmit symbol streams in either the time domain or the frequency domain.

摘要翻译： 描述了使用发射分集方案的组合来发送数据的技术。 这些发射分集方案包括空间扩展，连续波束成形，循环延迟分集，时空发射分集（STTD），空频发射分集（SFTD）和正交发射分集（OTD）。 发射实体基于发射分集方案（例如，STTD，SFTD或OTD）处理一个或多个（N N D D）个数据符号流，以产生多个（N SUB） ）编码符号流。 每个数据符号流可以作为单个编码符号流或使用STTD，SFTD或OTD作为多个（例如，两个）编码符号流发送。 发送实体可以在具有不同矩阵的N C C个编码符号流上执行空间扩展，以产生用于从N T T发送的多个（N T T T T）个发送符号流， / SUB>天线。 附加地或替代地，发送实体可以在时域或频域中的N T个发送符号流上执行连续波束成形。

公开(公告)号：US20050157805A1

公开(公告)日：2005-07-21

申请号：US11009200

申请日：2004-12-09

申请人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

发明人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

IPC分类号： H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/02

CPC分类号： H04J11/003 ,  C07K2317/22 ,  C07K2317/622 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/06

摘要： For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.

摘要翻译： 对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制，以获得相应的数据符号块，（2）将数据符号块复用到N个S / S数据符号流上以便传输 （3）用导向矩阵空间扩展N S S个数据符号流，并且（4）空间地处理N S S个数据符号流， / SUB>扩展符号流，用于N信道本征模式上的全CSI传输或MIMO信道的N SUB空间信道上的部分CSI传输。 接收实体（1）通过N个N个接收天线获得接收到的N N个符号流，（2）执行用于全CSI或部分CSI传输的接收机空间处理，以获得 （3）使用发送实体使用的相同导向矩阵空间地解扩N N S S个检测到的符号流，以获得N N个S＆lt; S＆lt; S＆lt; （4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

公开(公告)号：US20050130694A1

公开(公告)日：2005-06-16

申请号：US11049319

申请日：2005-02-01

申请人： Irina Medvedev ,  Jay Walton ,  John Ketchum

发明人： Irina Medvedev ,  Jay Walton ,  John Ketchum

IPC分类号： H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B7/00

CPC分类号： H04B7/0417 ,  H04B7/0619 ,  H04L1/0001 ,  H04L1/06 ,  H04W52/42

摘要： Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.

摘要翻译： 用于在无线多信道（例如，MIMO）通信系统中控制多个数据流的发射功率的技术。 在一种方法中，根据特定（例如，CCMI，CCMI-SC，MMSE或MMSE-SC）接收机处理技术最初处理多个接收到的符号流，以提供多个检测到的数据流。 估计检测到的数据流的检测后SNR，并且识别超过设定点的每个SNR。 该设定点可以对应于（1）实现最大允许频谱效率所需的SNR或（2）实现特定频谱效率所需的目标SNR。 确定与用于超过设定点的检测后SNR相关联的每个检测到的数据流的新（或调整的）发射功率并将其用于数据流。 为不同类型的具有不同特性的接收机处理技术提供不同的功率控制方案。

公开(公告)号：US20050002468A1

公开(公告)日：2005-01-06

申请号：US10903813

申请日：2004-07-29

申请人： Jay Walton ,  Mark Wallace ,  John Ketchum ,  Steven Howard

发明人： Jay Walton ,  Mark Wallace ,  John Ketchum ,  Steven Howard

IPC分类号： H04J99/00 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04L1/00 ,  H04L1/02

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/10 ,  H04B7/12 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0071

摘要： Techniques to “successively” process received signals at a receiver unit in a MIMO system to recover transmitted data, and to “adaptively” process data at a transmitter unit based on channel state information available for the MIMO channel. A successive cancellation receiver processing technique is used to process the received signals and performs a number of iterations to provide decoded data streams. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is approximately removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are estimated and reported back to the transmitter system and used to adjust (i.e., adapt) the processing (e.g., coding, modulation, and so on) of data prior to transmission.

摘要翻译： 在MIMO系统的接收机单元处“接收”处理接收信号以恢复所发送的数据，并且基于可用于MIMO信道的信道状态信息“自适应地”处理发射机单元处的数据的技术。 使用连续的取消接收器处理技术来处理所接收的信号并执行多次迭代以提供解码的数据流。 对于每次迭代，处理用于迭代的输入（例如，接收的）信号以提供一个或多个符号流。 选择并处理符号流中的一个以提供解码的数据流。 从解码的数据流引起的干扰从提供给下一次迭代的输入信号中大致去除（即，取消）。 信道特性被估计并报告给发射机系统，并用于在传输之前调整（即，适应）数据的处理（例如，编码，调制等）。

公开(公告)号：US20080095282A1

公开(公告)日：2008-04-24

申请号：US11963199

申请日：2007-12-21

申请人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

发明人： Jay Walton ,  John Ketchum ,  Mark Wallace ,  Steven Howard

IPC分类号： H04B7/10

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0678 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0023 ,  H04L25/0224

摘要： For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.

摘要翻译： 对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制以获得对应的数据符号块，（2）将数据符号块复用到NS数据符号流上，以在MIMO信道的NS传输信道上传输， （3）用导向矩阵空间扩展NS数据符号流，以及（4）在NS信道的NS个空间信道上的NS本征模或部分CSI传输上空间处理用于全CSI传输的NS扩展符号流。 接收实体（1）通过NR个接收天线获得NR个接收到的符号流，（2）执行全CSI或部分CSI传输的接收机空间处理，以获得NS检测符号流，（3）空间地解扩NS检测符号流， 发送实体使用相同的导向矩阵来获得NS恢复的符号流，以及（4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

公开(公告)号：US20060285531A1

公开(公告)日：2006-12-21

申请号：US11158586

申请日：2005-06-21

申请人： Steven Howard ,  John Ketchum ,  Mark Wallace ,  Peter Monsen ,  Jay Walton

发明人： Steven Howard ,  John Ketchum ,  Mark Wallace ,  Peter Monsen ,  Jay Walton

IPC分类号： H04J1/00 ,  H04L1/02

CPC分类号： H04B7/0854 ,  H04B7/0413 ,  H04L25/0246 ,  H04L25/0248 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03611

摘要： Techniques to efficiently derive a spatial filter matrix are described. In a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix.

摘要翻译： 描述了有效地导出空间滤波器矩阵的技术。 在第一种方案中，基于信道响应矩阵迭代地导出Hermitian矩阵，并且通过迭代地导出Hermitian矩阵来间接计算矩阵求逆。 基于Hermitian矩阵和信道响应矩阵导出空间滤波矩阵。 在第二方案中，执行多次旋转以迭代地获得用于信道响应矩阵的伪逆矩阵的第一和第二矩阵。 基于第一和第二矩阵导出空间滤波器矩阵。 在第三方案中，基于信道响应矩阵形成矩阵并分解以获得酉矩阵和对角矩阵。 基于单一矩阵，对角矩阵和信道响应矩阵导出空间滤波器矩阵。

公开(公告)号：US20060104381A1

公开(公告)日：2006-05-18

申请号：US11184601

申请日：2005-07-18

申请人： Murali Menon ,  John Ketchum ,  Mark Wallace ,  Jay Walton ,  Steven Howard

发明人： Murali Menon ,  John Ketchum ,  Mark Wallace ,  Jay Walton ,  Steven Howard

IPC分类号： H04B7/02 ,  H04K1/10

CPC分类号： H04B7/0417 ,  H01Q3/26 ,  H04B7/043 ,  H04B7/0617 ,  H04B7/0634 ,  H04L5/0025 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0096 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

摘要： Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling, or uniform). A scaling value is then obtained for each subband based on its allocated transmit power. Data to be transmitted is coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector. A stream of preconditioned symbols is then formed for each transmit antenna.

摘要翻译： 执行波束转向和波束成形以在宽带多输入通道中的单个本征模上传输数据的技术。 在一种方法中，为多个子带中的每一个获得导向矢量。 取决于如何定义导向矢量，可以为每个子带实现波束转向或波束形成。 基于特定功率分配方案（例如，全信道反转，选择性信道反转，充水或均匀）将总发射功率分配给子带。 然后根据其分配的发射功率，为每个子带获得缩放值。 要发送的数据被编码和调制以提供调制符号。 要在每个子带上发送的调制符号用子带的缩放值进行缩放，并进一步用子带的导向矢量进行预处理。 然后为每个发射天线形成预处理符号流。

公开(公告)号：US20050175115A1

公开(公告)日：2005-08-11

申请号：US11008865

申请日：2004-12-09

申请人： Jay Walton ,  Lizhong Zheng ,  John Ketchum ,  Mark Wallace ,  Steven Howard

发明人： Jay Walton ,  Lizhong Zheng ,  John Ketchum ,  Mark Wallace ,  Steven Howard

IPC分类号： H04J99/00 ,  H04L1/06 ,  H04L1/02

CPC分类号： H04B7/0417 ,  H04B7/0456 ,  H04B7/0669 ,  H04B17/336 ,  H04L1/06

摘要： Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM>1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.

摘要翻译： 在多天线系统中执行空间扩展，以随机化接收实体针对每个发送的数据符号块观察到的“有效”信道。 对于MIMO系统，在发送实体处理（例如，编码，交织和调制）数据以获得N N个数据符号块，以在N M M中发送。 传输范围，其中N = 1和N M M 1。 N N个块被划分为N个M个数据符号子块，每个传输跨度的一个子块。 对于每个子块，选择导向矩阵（例如，以确定性或伪随机方式从一组L个导引矩阵中，其中L> 1）。 利用为该子块选择的导引矩阵来对每个数据符号子块进行空间处理，以获得在一个传输跨度中通过N T个发射天线进一步处理和传输的发射符号。 N N个数据符号块因此用N M M导引矩阵进行空间处理并观察信道的整体。