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1. 发明授权

US07346115B2 Iterative eigenvector computation for a MIMO communication system 有权
标题翻译： MIMO通信系统的迭代特征向量计算
公开(公告)号：US07346115B2
公开(公告)日：2008-03-18
申请号：US10830907
申请日：2004-04-22
申请人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
发明人： Steven J. Howard , John W. Ketchum , Mark S. Wallace , Peter Monsen , J. Rodney Walton
IPC分类号： H04L27/28 , H04L1/02
CPC分类号： H04B7/0615 , H04B7/0413
摘要： A matrix {circumflex over (V)} of eigenvectors is derived using an iterative procedure. For the procedure, an eigenmode matrix Vi is first initialized, e.g., to an identity matrix. The eigenmode matrix Vi is then updated based on a channel response matrix Ĥ for a MIMO channel to obtain an updated eigenmode matrix Vi+1. The eigenmode matrix may be updated for a fixed or variable number of iterations. The columns of the updated eigenmode matrix may be orthogonalized periodically to improve performance and ensure stability of the iterative procedure. In one embodiment, after completion of all iterations, the updated eigenmode matrix for the last iteration is provided as the matrix {circumflex over (V)}.
摘要翻译：使用迭代过程导出特征向量的矩阵 V。对于该过程，本征模式矩阵 V I i首先被初始化，例如，到单位矩阵。然后，基于MIMO信道的信道响应矩阵 H更新本征模式矩阵 V i，以获得更新的本征模式矩阵 V i + 1 。可以针对固定或可变数量的迭代更新本征模式矩阵。更新的本征模式矩阵的列可以周期性地正交化以提高性能并确保迭代过程的稳定性。在一个实施例中，在完成所有迭代之后，最后迭代的更新的本征模式矩阵被提供为矩阵 V。

2. 发明授权

US08081728B2 Method and apparatus for clock correction in MIMO OFDM 有权
标题翻译： MIMO OFDM中的时钟校正方法和装置
公开(公告)号：US08081728B2
公开(公告)日：2011-12-20
申请号：US11734961
申请日：2007-04-13
申请人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
发明人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
IPC分类号： H04L7/00 , H03D1/04
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。

3. 发明授权

US08107566B2 Noise estimation for wireless communication 有权
标题翻译：无线通信噪声估计
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。

4. 发明授权

US08477891B2 Noise estimation for wireless communication 有权
标题翻译：无线通信噪声估计
公开(公告)号：US08477891B2
公开(公告)日：2013-07-02
申请号：US13361610
申请日：2012-01-30
申请人： Mark S. Wallace , Peter Monsen
发明人： Mark S. Wallace , Peter Monsen
IPC分类号： H03D1/04 , H04L27/06 , 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. The noise estimate may be derived by determining a phase offset between a first and second sample sequence, applying the phase offset to the first sample sequence to obtain a third sample sequence, and deriving the noise estimate based on the second and third sample sequences. Data detection may then be performed for each packet using the noise estimate for that packet. At least one weight may be derived for each packet using the noise estimate for the packet. Data detection is then performed for each packet with the at least one weight for the packet.
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。可以通过确定第一和第二采样序列之间的相位偏移，将相位偏移应用于第一采样序列以获得第三采样序列，并且基于第二和第三采样序列导出噪声估计来导出噪声估计。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。可以使用分组的噪声估计为每个分组导出至少一个权重。然后对于具有用于分组的至少一个权重的每个分组执行数据检测。

5. 发明申请

US20120128109A1 NOISE ESTIMATION FORWIRELESS COMMUNICATION 有权
标题翻译：噪声估计无线通信
公开(公告)号：US20120128109A1
公开(公告)日：2012-05-24
申请号：US13361610
申请日：2012-01-30
申请人： Mark S. Wallace , Peter Monsen
发明人： Mark S. Wallace , Peter Monsen
IPC分类号： H04B1/10
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。

6. 发明授权

US07590204B2 Technique for adaptive equalization in band-limited high data rate communication over fading dispersive channels 失效
标题翻译：通过衰落色散通道进行频带限制高数据速率通信中的自适应均衡技术
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。

7. 发明申请

US20070147251A1 Technique for adaptive data rate communication over fading dispersive channels 有权
标题翻译：用于通过衰落色散通道进行自适应数据速率通信的技术
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。

8. 发明授权

US4328585A Fast adapting fading channel equalizer 失效
标题翻译：快速适应衰落信道均衡器
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。

9. 发明申请

US20060182193A1 Technique for adaptive equalization in band-limited high data rate communication over fading dispersive channels 失效
标题翻译：通过衰落色散通道进行频带限制高数据速率通信中的自适应均衡技术
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。

10. 发明授权

US07088671B1 Multiple access technique for downlink multibeam digital radio systems 有权
标题翻译：下行多波束数字无线电系统的多址技术
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。

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