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1. 发明授权

US08903016B2 Spatial spreading in a multi-antenna communication system 有权
标题翻译：多天线通信系统中的空间扩展
公开(公告)号：US08903016B2
公开(公告)日：2014-12-02
申请号：US13526160
申请日：2012-06-18
申请人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04L27/26 , H04B7/02 , H04B7/06 , H04L1/06 , H04B7/04
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，以获得将以NM≥1和NM> 1的NM传输跨度发送的ND数据符号块。 ND块被划分为NM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）。每个数据符号子块用为该子块选择的导引矩阵进行空间处理，以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。因此，ND数据符号块用NM导引矩阵进行空间处理，并观察信道的集合。

2. 发明申请

US20120250788A1 SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 有权
标题翻译：多天线通信系统中的空间传播
公开(公告)号：US20120250788A1
公开(公告)日：2012-10-04
申请号：US13526160
申请日：2012-06-18
申请人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/06
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每个发送的数据符号块的接收实体观察到的有效信道。对于MIMO系统，在发送实体处理（例如，编码，交织和调制）数据以获得要在NM传输跨度中发送的ND数据符号块，其中ND≥1和NM> 1。 ND块被划分为NM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）。每个数据符号子块用为该子块选择的导引矩阵进行空间处理，以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。因此，ND数据符号块用NM导引矩阵进行空间处理，并观察信道的集合。

3. 发明授权

US08204149B2 Spatial spreading in a multi-antenna communication system 有权
标题翻译：多天线通信系统中的空间扩展
公开(公告)号：US08204149B2
公开(公告)日：2012-06-19
申请号：US11008865
申请日：2004-12-09
申请人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , Lizhong Zheng , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04L27/26 , H04B7/06
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，以获得将以NM≥1和NM> 1的NM传输跨度发送的ND数据符号块。 ND块被划分为NM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）。每个数据符号子块用为该子块选择的导引矩阵进行空间处理，以获得在一个传输范围内经由NT个发射天线进一步处理和传输的发射符号。因此，ND数据符号块用NM导引矩阵进行空间处理，并观察信道的集合。

4. 发明授权

US08750151B2 Channel calibration for a time division duplexed communication system 有权
标题翻译：时分双工通信系统的通道校准
公开(公告)号：US08750151B2
公开(公告)日：2014-06-10
申请号：US13419245
申请日：2012-03-13
申请人： Mark S. Wallace , John W. Ketchum , Jay Rodney Walton , Steven J. Howard
发明人： Mark S. Wallace , John W. Ketchum , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04B7/00 , H04W4/00 , H04B17/00 , H04L7/00 , H04B7/04 , H04W52/50 , H04W74/04 , H04L1/00
CPC分类号： H04B7/0421 , H04B7/0615 , H04B7/0619 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04B17/336 , H04L1/00 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0059 , H04L1/0061 , H04L1/0068 , H04L1/0071 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L1/16 , H04L5/1469 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/03006 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/261 , H04L27/2647 , H04L2001/0093 , H04W16/28 , H04W52/50 , H04W74/04
摘要： Techniques to calibrate downlink and uplink channels to account for differences in the frequency responses of transmit and receive chains are described. In one embodiment, pilots are transmitted on downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Sets of correction factors are then determined based on estimates of downlink and uplink channel responses. A calibrated downlink channel is formed using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error computation. The calibration may be performed in real-time based on over-the-air transmission. Other aspects, embodiments, and features are also claimed and described.
摘要翻译：描述了校准下行链路和上行链路信道以解决发射和接收链的频率响应差异的技术。在一个实施例中，导频在下行链路和上行链路信道上传输，并用于分别导出下行链路和上行链路信道响应的估计。然后基于下行链路和上行链路信道响应的估计来确定校正因子的集合。使用用于下行链路信道的第一组校正因子形成校准的下行链路信道，并且使用用于上行链路信道的第二组校正因子形成校准的上行链路信道。可以使用矩阵比计算或最小均方误差计算来确定第一和第二组校正因子。校准可以基于空中传输实时执行。还要求和描述其它方面，实施例和特征。

5. 发明授权

US08543070B2 Reduced complexity beam-steered MIMO OFDM system 有权
标题翻译：降低复杂度的波束控制MIMO OFDM系统
公开(公告)号：US08543070B2
公开(公告)日：2013-09-24
申请号：US11481705
申请日：2006-07-05
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Jay Rodney Walton
IPC分类号： H03C7/02 , H04M1/00 , H04B1/00 , H04B7/208 , H04B15/00
CPC分类号： H04B7/0421 , H04B7/0634 , H04B7/0639 , H04B7/066 , H04L5/0023 , H04L5/0048 , H04L25/0248 , H04L25/03343 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data using channel information for a subset of all subcarriers used for data transmission are described. A transmitter station receives channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission. The channel information may include at least one transmit steering matrix, at least one set of eigenvectors, at least one channel response matrix, at least one channel covariance matrix, an unsteered pilot, or a steered pilot for the at least one subcarrier. The transmitter station obtains at least one transmit steering matrix for the at least one subcarrier from the channel information and determines a transmit steering matrix for each of the multiple subcarriers. The transmitter station performs transmit steering or beam-steering for each of the multiple subcarriers with the transmit steering matrix for that subcarrier.
摘要翻译：描述了使用用于数据传输的所有子载波的子集的信道信息来发送数据的技术。发射机站接收作为用于数据传输的多个子载波的子集的至少一个子载波的信道信息。信道信息可以包括至少一个发射导向矩阵，至少一组特征向量，至少一个信道响应矩阵，至少一个信道协方差矩阵，非导向导频或用于所述至少一个子载波的导频导频。发射机站从信道信息中获取至少一个子载波的至少一个发射导向矩阵，并确定多个子载波中的每一个的发射导向矩阵。发射台使用该子载波的发射导向矩阵对多个子载波中的每一个进行发射导向或波束导向。

6. 发明授权

US08325844B2 Data transmission with spatial spreading in a MIMO communication system 有权
标题翻译：在MIMO通信系统中具有空间扩展的数据传输
公开(公告)号：US08325844B2
公开(公告)日：2012-12-04
申请号：US12815870
申请日：2010-06-15
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B7/02 , H04L1/02
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。

7. 发明授权

US08923446B2 Single-burst acquisition for wireless communication system 有权
标题翻译：无线通信系统的单脉冲采集
公开(公告)号：US08923446B2
公开(公告)日：2014-12-30
申请号：US12968196
申请日：2010-12-14
申请人： Mark S. Wallace , John W. Ketchum , Jay Rodney Walton , Steven J. Howard
发明人： Mark S. Wallace , John W. Ketchum , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04L27/06 , H04W52/42 , H04L27/26 , H04W52/28
CPC分类号： H04W52/42 , H04L27/2613 , H04L27/2659 , H04L27/266 , H04W52/286
摘要： Techniques for performing acquisition of packets are described. First detection values may be determined based on a first plurality of samples, e.g., by performing delay-multiply-integrate on the samples. Power values may be determined based on the first plurality of samples, e.g., by performing multiply-integrate on the samples. The first detection values may be averaged to obtain average detection values. The power values may also be averaged to obtain average power values. Whether a packet is presence may be determined based on the average detection values and the average power values. Second detection values may be determined based on a second plurality of samples. The start or the packet may be determined based on the first and second detection values. A third detection value may be determined based on a third plurality of samples. Frequency error of the packet may be estimated based on the first and third detection values.
摘要翻译：描述用于执行分组获取的技术。可以基于第一多个样本来确定第一检测值，例如通过对样本执行延迟乘法积分。功率值可以基于第一多个样本来确定，例如通过对样本进行乘法积分。可以对第一检测值进行平均以获得平均检测值。功率值也可以被平均以获得平均功率值。可以基于平均检测值和平均功率值来确定分组是否存在。可以基于第二多个样本来确定第二检测值。可以基于第一和第二检测值来确定起始或分组。可以基于第三多个样本来确定第三检测值。可以基于第一和第三检测值来估计分组的频率误差。

8. 发明授权

US08218609B2 Closed-loop rate control for a multi-channel communication system 有权
标题翻译：多通道通信系统的闭环速率控制
公开(公告)号：US08218609B2
公开(公告)日：2012-07-10
申请号：US10448801
申请日：2003-05-31
申请人： Jay Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
发明人： Jay Rodney Walton , Mark S. Wallace , John W. Ketchum , Steven J. Howard
IPC分类号： H04B1/38 , H04L27/00 , H04L23/00 , H04L27/28 , H04L7/06
CPC分类号： H04L27/261 , H04B7/0417 , H04B7/043 , H04B7/0443 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04L1/0002 , H04L1/0003 , H04L1/0009 , H04L1/0016 , H04L1/0017 , H04L1/0025 , H04L1/0059 , H04L1/0061 , H04L1/0071 , H04L1/0675 , H04L1/20 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/2647 , H04L2001/0093 , H04W16/28 , H04W52/50 , Y02D50/10
摘要： Closed-loop rate control for data transmission on multiple parallel channels is provided. An inner loop estimates the channel conditions for a communication link and selects a suitable data rate for each of the multiple parallel channels based on the channel estimates. For each parallel channel, a received SNR is computed based on the channel estimates, an operating SNR is computed based on the received SNR and an SNR offset for the parallel channel, and the data rate is selected based on the operating SNR for the parallel channel and a set of required SNRs for a set of data rates supported by the system. An outer loop estimates the quality of data transmissions received on the multiple parallel channels and adjusts the operation of the inner loop. For example, the SNR offset for each parallel channel is adjusted based on the status of packets received on that parallel channel.
摘要翻译：提供了在多个并行通道上进行数据传输的闭环速率控制。内部循环估计通信链路的信道条件，并且基于信道估计为每个多个并行信道选择合适的数据速率。对于每个并行信道，基于信道估计来计算接收到的SNR，基于接收的SNR和并行信道的SNR偏移来计算操作SNR，并且基于并行信道的操作SNR来选择数据速率以及用于系统支持的一组数据速率的一组所需的SNR。外部环路估计在多个并行通道上接收的数据传输的质量，并调整内部循环的操作。例如，基于在该并行信道上接收的分组的状态来调整每个并行信道的SNR偏移。

9. 发明申请

US20110142097A1 DATA TRANSMISSION WITH SPATIAL SPREADING IN A MIMO COMMUNICATION SYSTEM 有权
标题翻译：数据传输与MIMO通信系统中的空间传播
公开(公告)号：US20110142097A1
公开(公告)日：2011-06-16
申请号：US12815870
申请日：2010-06-15
申请人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
发明人： Jay Rodney Walton , John W. Ketchum , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B1/707
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。

10. 发明授权

US07653142B2 Channel estimation and spatial processing for TDD MIMO systems 有权
标题翻译： TDD MIMO系统的信道估计和空间处理
公开(公告)号：US07653142B2
公开(公告)日：2010-01-26
申请号：US11610351
申请日：2006-12-13
申请人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
发明人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04L1/02 , H04L27/00
CPC分类号： H04L27/261 , H04B7/0413 , H04B7/0421 , H04B7/0615 , H04B7/0619 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/2647 , H04W16/28 , H04W52/50
摘要： Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user terminal. During normal operation, a MIMO pilot is transmitted on a first link and used to derive an estimate of the first link channel response, which is decomposed to obtain a diagonal matrix of singular values and a first unitary matrix containing both left eigenvectors of the first link and right eigenvectors of a second link. A steered reference is transmitted on the second link using the eigenvectors in the first unitary matrix, and is processed to obtain the diagonal matrix and a second unitary matrix containing both left eigenvectors of the second link and right eigenvectors of the first link. Each unitary matrix may be used to perform spatial processing for data transmission/reception via both links.
摘要翻译： TDD MIMO系统的信道估计和空间处理。可以执行校准以解决在接入点和用户终端处的发送/接收链的响应的差异。在正常操作期间，在第一链路上发送MIMO导频，并用于导出第一链路信道响应的估计，其被分解以获得奇异值的对角矩阵，以及包含第一链路的左特征向量的第一酉矩阵和第二个链接的右特征向量。使用第一单位矩阵中的特征向量在第二链路上传送转向参考，并且被处理以获得对角矩阵和包含第二链路的左特征向量和第一链路的右特征向量的第二单元矩阵。每个单一矩阵可以用于经由两个链路进行数据发送/接收的空间处理。

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