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：US20080089458A1

公开(公告)日：2008-04-17

申请号：US11734961

申请日：2007-04-13

申请人： Mark Wallace ,  Peter Monsen

发明人： Mark Wallace ,  Peter Monsen

IPC分类号： H04L7/00

CPC分类号： H04L27/0014 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2679 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04L2027/0087

摘要： A method of phase correction at a wireless device includes: estimating a phase slope for an OFDM symbol in a data portion of a packet based on an elapsed time from the start of the packet; measuring a residual phase slope from tracking pilots for the OFDM symbol in the data portion of the packet; and adjusting a phase correction based upon the phase slope and the residual phase slope. Apparatus in a wireless device performs the method and machine-readable media carry instructions for carrying out the method.

摘要翻译： 一种无线设备的相位校正方法包括：基于从分组开始起的经过时间，估计分组的数据部分中的OFDM符号的相位斜率; 测量分组的数据部分中的OFDM符号的跟踪导频的残留相位斜率; 以及基于相位斜率和残余相位斜率调整相位校正。 无线设备中的设备执行方法和机器可读介质携带用于执行该方法的指令。

公开(公告)号：US20070242768A1

公开(公告)日：2007-10-18

申请号：US11736091

申请日：2007-04-17

申请人： Mark Wallace ,  Peter Monsen

发明人： Mark Wallace ,  Peter Monsen

IPC分类号： H04K1/10

CPC分类号： H04L1/20 ,  H04L25/0242 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Techniques for deriving and using noise estimate for data reception in a wireless communication system are described. A noise estimate may be derived for each packet received in a data transmission. Data detection may then be performed for each packet using the noise estimate for that packet. For noise estimation, a first sample sequence and a second sample sequence may be obtained from each receiver used for data reception. A phase offset between the first and second sample sequences may be determined and applied to the first sample sequence for each receiver to obtain a third sample sequence for that receiver. A noise estimate may then be derived based on the power of the differences between the second and third sample sequences for the at least one receiver.

摘要翻译： 描述了在无线通信系统中导出和使用数据接收的噪声估计的技术。 可以为在数据传输中接收的每个分组导出噪声估计。 然后可以使用该分组的噪声估计对每个分组执行数据检测。 对于噪声估计，可以从用于数据接收的每个接收机获得第一采样序列和第二采样序列。 可以确定第一和第二采样序列之间的相位偏移并将其应用于每个接收机的第一采样序列，以获得该接收机的第三采样序列。 然后可以基于对于至少一个接收器的第二和第三采样序列之间的差的功率来导出噪声估计。

公开(公告)号：US07590204B2

公开(公告)日：2009-09-15

申请号：US11348816

申请日：2006-02-06

申请人： Peter Monsen

发明人： Peter Monsen

IPC分类号： H04B1/10

CPC分类号： H04L25/03057 ,  H04L1/0047 ,  H04L1/0631 ,  H04L25/0224 ,  H04L2025/03426

摘要： In high data rate communication applications where digital data information is error-corrected coded and interleaved and transmitted with spectral limitations over fading dispersive channels, a method and receiver is described that incorporates channel estimation and decision-feedback equalization. Channel estimation is accomplished within a receiver time block with locally generated reference symbol sequences. The parameters of the decision-feedback equalizer (DFE) are computed directly from the channel estimates. The DFE is an optimum finite length realization that includes effects from spectrum control filtering, a space-time block coder (STBC) on multiple transmit antennas, multiple receiver diversity signals, and the fading dispersive channel. The DFE includes a matched filter, forward filter, backward filter, and detector. A symbol combiner within the matched filter produces a P+1 dimensional signal that provides ideal cancellation of P intersymbol interferers in the forward filter. When P is selected to meet an intersymbol interference (ISI) criterion, all desired signal energy is collected and all ISI can be ideally cancelled. The DFE processes received signals within the receiver time block to produce information symbol estimates that are subsequently deinterleaved and error-correction decoded to recover the transmitted digital data information. Deinterleaving over multiple receiver time blocks further compensates for channel estimation variations from block to block. Additionally the STBC and DFE are used in a quadruple angle diversity technique requiring only a single antenna at each terminal of a troposcatter link to provide performance approaching that of a nonfading satellite link.

摘要翻译： 在高数据速率通信应用中，其中数字数据信息经过纠错编码和交织并且通过衰落色散通道的频谱限制传输，描述了一种结合信道估计和判决反馈均衡的方法和接收机。 在具有本地产生的参考符号序列的接收机时间块内完成信道估计。 决策反馈均衡器（DFE）的参数直接从信道估计中计算出来。 DFE是一种最佳的有限长度实现，包括频谱控制滤波，多发射天线上的空时块编码器（STBC），多个接收机分集信号和衰落色散信道的影响。 DFE包括匹配滤波器，正向滤波器，反向滤波器和检测器。 匹配滤波器内的符号组合器产生P + 1维信号，其提供正向滤波器中P符号间干扰源的理想取消。 当选择P以满足符号间干扰（ISI）标准时，收集所有期望的信号能量，并且所有ISI可以被理想地取消。 DFE在接收器时间块内处理接收到的信号，以产生随后解交错和纠错解码的信息符号估计，以恢复发送的数字数据信息。 在多个接收器时间块上进行去交错进一步补偿从块到块的信道估计变化。 此外，STBC和DFE以四重角度分集技术使用，其仅在对流层散射器链路的每个终端处仅需要单个天线来提供接近非衰落卫星链路的性能。

公开(公告)号：US20070147251A1

公开(公告)日：2007-06-28

申请号：US11499174

申请日：2006-08-04

申请人： Peter Monsen

发明人： Peter Monsen

IPC分类号： H04J1/16 ,  H04L12/66

CPC分类号： H04B7/10 ,  H04B7/0632 ,  H04B7/0636 ,  H04L1/0002 ,  H04L1/0026

摘要： In a duplex radio link wherein digital data information from a data interface is transmitted from a local terminal to a remote terminal over fading dispersive channels, a method and transceiver are described that provide for transmission at an adaptive data rate. The transmission is at a constant symbol rate so that the signal bandwidth can be fixed and at the remote terminal receiver the input sampling rate can be fixed. The digital data information is transmitted over a constant data rate interval in accordance with a selected data rate mode that is a function of direct sequence spreading gain, error correction code rate, and signal constellation type. The data rate is adapted by selecting a data rate mode that is a function of the arrival rate of data packets from the data interface and a link quality measure fed back from the remote terminal. The data packet arrival rate is controlled as a function of the link quality measure and the current data packet arrival rate. In systems with multiple transmit diversity channels, independent data is sent over each of the transmit diversity channels. The adaptive data rate technique utilizes both orthogonal transmit diversities such as frequency and troposcatter polarization diversity as well as nonorthogonal transmit diversities in a Multiple-input Multiple-Output (MIMO) configuration. A single antenna troposcatter link using angle diversity and adaptation of data rate by feedback communications is described. In an idealized feedback communication example, the single antenna system in a Ku-band application is shown to have 15.5 times the data rate capability of a conventional two-antenna system at S-band.

摘要翻译： 在通过衰落色散信道从数据接口的数字数据信息从本地终端发送到远程终端的双工无线电链路中，描述了以自适应数据速率进行传输的方法和收发机。 传输是恒定的符号率，使得信号带宽可以固定，并且在远程终端接收机处可以固定输入采样率。 根据作为直接序列扩展增益，纠错码率和信号星座类型的函数的选择的数据速率模式，以恒定的数据速率间隔发送数字数据信息。 通过选择数据速率模式来调整数据速率，该数据速率模式是来自数据接口的数据分组的到达速率和从远程终端反馈的链路质量测量的函数。 数据分组到达速率根据链路质量测量和当前数据分组到达速率进行控制。 在具有多个发射分集信道的系统中，通过每个发射分集信道发送独立数据。 自适应数据速率技术利用正交发射多样性，例如频率和对流层散射极化分集以及多输入多输出（MIMO）配置中的非正交发射多样性。 描述了使用角度分集和通过反馈通信适应数据速率的单个天线对流层散射器链路。 在理想化的反馈通信示例中，Ku波段应用中的单天线系统被示为具有S波段的常规双天线系统的数据速率能力的15.5倍。

公开(公告)号：US4328585A

公开(公告)日：1982-05-04

申请号：US136543

申请日：1980-04-02

申请人： Peter Monsen

发明人： Peter Monsen

IPC分类号： H04B7/015 ,  H04B7/08 ,  H03K5/159

CPC分类号： H04B7/0851 ,  H04B7/015

摘要： A receiver system for processing diversity channel signals to substantially eliminate future and past intersymbol interference (ISI) in received signals which have been transmitted through a time-varying frequency selective transmission medium. The system includes lattice filter means which provide forward error residual signals which are used for generating uncorrelated adaptive weighting signals which eliminate future ISI and decision feedback circuitry which provide uncorrelated adaptive weighting signals which eliminate past ISI.

摘要翻译： 一种用于处理分集信道信号的接收机系统，以基本上消除已经通过时变频率选择传输介质传输的接收信号中的未来和过去的符号间干扰（ISI）。 该系统包括格子滤波器装置，其提供用于产生不相关的自适应加权信号的前向误差残留信号，其消除未来的ISI和判决反馈电路，其提供消除过去的ISI的不相关的自适应加权信号。

公开(公告)号：US20060182193A1

公开(公告)日：2006-08-17

申请号：US11348816

申请日：2006-02-06

申请人： Peter Monsen

发明人： Peter Monsen

IPC分类号： H04L1/02 ,  H03D1/00 ,  H04L27/06 ,  H04B1/10

CPC分类号： H04L25/03057 ,  H04L1/0047 ,  H04L1/0631 ,  H04L25/0224 ,  H04L2025/03426

摘要： In high data rate communication applications where digital data information is error-corrected coded and interleaved and transmitted with spectral limitations over fading dispersive channels, a method and receiver is described that incorporates channel estimation and decision-feedback equalization. Channel estimation is accomplished within a receiver time block with locally generated reference symbol sequences. The parameters of the decision-feedback equalizer (DFE) are computed directly from the channel estimates. The DFE is an optimum finite length realization that includes effects from spectrum control filtering, a space-time block coder (STBC) on multiple transmit antennas, multiple receiver diversity signals, and the fading dispersive channel. The DFE includes a matched filter, forward filter, backward filter, and detector. A symbol combiner within the matched filter produces a P+1 dimensional signal that provides ideal cancellation of P intersymbol interferers in the forward filter. When P is selected to meet an intersymbol interference (ISI) criterion, all desired signal energy is collected and all ISI can be ideally cancelled. The DFE processes received signals within the receiver time block to produce information symbol estimates that are subsequently deinterleaved and error-correction decoded to recover the; transmitted digital data information. Deinterleaving over multiple receiver time blocks further compensates for channel estimation variations from block to block. Additionally the STBC and DFE are used in a quadruple angle diversity technique requiring only a single antenna at each terminal of a troposcatter link to provide performance approaching that of a nonfading satellite link.

摘要翻译： 在高数据速率通信应用中，其中数字数据信息经过纠错编码和交织并且通过衰落色散通道的频谱限制传输，描述了一种结合信道估计和判决反馈均衡的方法和接收机。 信道估计在具有本地生成的参考符号序列的接收机时间块内完成。 决策反馈均衡器（DFE）的参数直接从信道估计中计算出来。 DFE是一种最佳的有限长度实现，包括频谱控制滤波，多发射天线上的空时块编码器（STBC），多个接收机分集信号和衰落色散信道的影响。 DFE包括匹配滤波器，正向滤波器，反向滤波器和检测器。 匹配滤波器内的符号组合器产生P + 1维信号，其提供正向滤波器中P符号间干扰源的理想取消。 当选择P以满足符号间干扰（ISI）标准时，收集所有期望的信号能量，并且所有ISI可以被理想地取消。 DFE在接收器时间块内处理接收到的信号，以产生随后解交错和纠错解码的信息符号估计; 传输数字数据信息。 在多个接收器时间块上进行去交错进一步补偿从块到块的信道估计变化。 此外，STBC和DFE以四重角度分集技术使用，其仅在对流层散射器链路的每个终端处仅需要单个天线来提供接近非衰落卫星链路的性能。

公开(公告)号：US07088671B1

公开(公告)日：2006-08-08

申请号：US10110365

申请日：2000-11-22

申请人： Peter Monsen

发明人： Peter Monsen

IPC分类号： H04J11/00 ,  H04Q7/00

CPC分类号： H04B1/7107

摘要： A multiple access communication system with communication links between one or more central nodes each with a transmitter 1 including an antenna with one or more antenna beams, and user terminals 2 located in antenna beam coverage area 3. User terminals 2 assigned to one beam coverage area 3 use multiple access channels that are mutually orthogonal for receiving digital message information. These multiple access channels are reused by other user terminals 2 in adjacent and other beam regions. Single-axis error correcting coding 4, interleaving 5, channel assignment changes 7, precoding 8, and selected 90° phase rotation 9 are used in the central node transmitter 1 to reduce potential interference at a user terminal 2 from signals using the same orthogonal multiple access channel destined for user terminals 2 in other beam coverage areas 3. The communication system can realize complete reuse of all orthogonal multiple access channels in other beam coverage areas, i.e., a reuse factor of unity.

摘要翻译： 一种多址通信系统，其具有一个或多个中央节点之间的通信链路，每个中心节点具有包括具有一个或多个天线波束的天线的发射机1，以及位于天线波束覆盖区域3中的用户终端2。 分配给一个波束覆盖区域3的用户终端2使用相互正交用于接收数字消息信息的多个接入信道。 这些多路存取信道由相邻和其他波束区域中的其他用户终端2重新使用。 在中央节点发射机1中使用单轴纠错编码4，交织5，信道分配改变7，预编码8和选择的90°相位旋转9，以减少在用户终端2处使用相同正交多重的信号的潜在干扰 在其他波束覆盖区域3中发往用户终端2的接入信道。 通信系统可以实现其他波束覆盖区域中的所有正交多路访问信道的完全重用，即重用因子的一致性。

公开(公告)号：US08107566B2

公开(公告)日：2012-01-31

申请号：US11736091

申请日：2007-04-17

申请人： Mark S. Wallace ,  Peter Monsen

发明人： Mark S. Wallace ,  Peter Monsen

IPC分类号： H03D1/04 ,  H04L7/00

CPC分类号： H04L1/20 ,  H04L25/0242 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Techniques for deriving and using noise estimate for data reception in a wireless communication system are described. A noise estimate may be derived for each packet received in a data transmission. Data detection may then be performed for each packet using the noise estimate for that packet. For noise estimation, a first sample sequence and a second sample sequence may be obtained from each receiver used for data reception. A phase offset between the first and second sample sequences may be determined and applied to the first sample sequence for each receiver to obtain a third sample sequence for that receiver. A noise estimate may then be derived based on the power of the differences between the second and third sample sequences for the at least one receiver.

摘要翻译： 描述了在无线通信系统中导出和使用数据接收的噪声估计的技术。 可以为在数据传输中接收的每个分组导出噪声估计。 然后可以使用该分组的噪声估计对每个分组执行数据检测。 对于噪声估计，可以从用于数据接收的每个接收机获得第一采样序列和第二采样序列。 可以确定第一和第二采样序列之间的相位偏移并将其应用于每个接收机的第一采样序列，以获得该接收机的第三采样序列。 然后可以基于对于至少一个接收器的第二和第三采样序列之间的差的功率来导出噪声估计。