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公开(公告)号：US06327314B1
公开(公告)日：2001-12-04
申请号：US09089862
申请日：1998-06-03
IPC分类号： H03D100
CPC分类号： G01S3/72 , H01Q3/2605 , H04L25/022 , H04L27/2647
摘要： A method and apparatus provide channel estimation for multicarrier systems. A minimum mean-square-error (MMSE) channel estimator makes full use of time-and frequency-domain correlations of the frequency response of time-varying dispersive fading channels. A robust channel estimator that is insensitive to the channel statistics is provided. The robust channel estimator can significantly improve the performance of a multicarrier system such as an orthogonal frequency division multiplexing (OFDM) modulation system in a rapid dispersive fading channel. In addition, the estimation process can employ a new reference generator which can select the source of the reference signal as being a decoded or undecoded signal depending on the correction success rate of the decoder.
摘要翻译： 一种方法和装置为多载波系统提供信道估计。 最小均方误差（MMSE）信道估计器充分利用时变色散衰落信道的频率响应的时域和频域相关性。 提供对信道统计不敏感的鲁棒信道估计器。 鲁棒的信道估计器可以显着改善快速色散衰落信道中的诸如正交频分复用（OFDM）调制系统的多载波系统的性能。 此外，估计处理可以使用新的参考生成器，其可以根据解码器的校正成功率将参考信号的源选择为解码或未解码的信号。
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公开(公告)号：US08116260B1
公开(公告)日：2012-02-14
申请号：US09935069
申请日：2001-08-22
CPC分类号： H04B1/0475 , H04B7/0413 , H04B7/0669 , H04L5/0023 , H04L27/2626 , H04L27/2647 , H04W88/08
摘要： A wireless multiple-input multiple-output (MIMO) communication system includes signal simulcasting. Base stations include a plurality of transmit antennas and terminals include a plurality of receive antennas to form MIMO channels. In one embodiment, a simulcasting MIMO wireless communication system includes orthogonal frequency division multiplexing (OFDM). This arrangement achieves the spectral efficiency advantages of OFDM and simulcasting.
摘要翻译： 无线多输入多输出（MIMO）通信系统包括信号同步广播。 基站包括多个发射天线，并且终端包括多个接收天线以形成MIMO信道。 在一个实施例中，同时广播的MIMO无线通信系统包括正交频分复用（OFDM）。 这种安排实现了OFDM和同时播送的频谱效率优势。
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公开(公告)号：US07643404B2
公开(公告)日：2010-01-05
申请号：US11380531
申请日：2006-04-27
IPC分类号： H04J11/00
CPC分类号： H04L27/2601 , H04L1/0618
摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
摘要翻译： MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。
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公开(公告)号：US07369487B2
公开(公告)日：2008-05-06
申请号：US10875597
申请日：2004-06-24
申请人： Ye Li , Nelson Ray Sollenberger
发明人： Ye Li , Nelson Ray Sollenberger
CPC分类号： H04L27/2647 , H04L5/023 , H04L25/0204 , H04L25/0242
摘要： An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is applied to develop an Eigen matrix U that is used in developing estimates of the channels. Those channel estimates are used in the receiver to develop the output signals.
摘要翻译： 通过对传输信道采用简化的延迟函数来实现改进的OFDM接收机。 简化的延迟函数产生一个简化的频域相关性，用于开发用于开发信道估计的特征矩阵U。 在接收机中使用这些信道估计来开发输出信号。
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5.发明授权Adaptive antenna arrays for orthogonal frequency division multiplexing systems with co-channel interference 失效具有同信道干扰的正交频分复用系统的自适应天线阵列
公开(公告)号：US5973642A
公开(公告)日：1999-10-26
申请号：US53281
申请日：1998-04-01
申请人： Ye Li , Nelson Ray Sollenberger
发明人： Ye Li , Nelson Ray Sollenberger
CPC分类号： H04L25/022 , G01S3/72 , H01Q3/2605 , H04L27/2647
摘要： A technique for estimating parameters for adaptive antenna arrays in orthogonal frequency division multiplexing systems with co-channel interference is disclosed. Channel parameter estimation is preferentially performed using a two pass process that advantageously expands the temporal scope (relative to a single pass process) and considers past, present and future temporal channel estimations during parameter estimation. Channel parameters are estimated by processing the signals through fast Fourier transforms, temporal filters, and inverse fast Fourier transforms. The temporal filters optimize parameter estimation based upon instantaneous correlation of the received signals.
摘要翻译： 公开了一种用于在具有同信道干扰的正交频分复用系统中估计自适应天线阵列的参数的技术。 使用有利地扩展时间范围（相对于单次通过过程）的两通过程来优先执行信道参数估计，并且在参数估计期间考虑过去，现在和将来的时间信道估计。 信道参数是通过快速傅立叶变换处理信号，时间滤波器和快速傅立叶反变换来估计的。 时间滤波器基于接收信号的瞬时相关性优化参数估计。
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公开(公告)号：US08705452B2
公开(公告)日：2014-04-22
申请号：US13372313
申请日：2012-02-13
CPC分类号： H04B1/0475 , H04B7/0413 , H04B7/0669 , H04L5/0023 , H04L27/2626 , H04L27/2647 , H04W88/08
摘要： A wireless multiple-input multiple output (MIMO) communication system includes signaling simulcasting. Base stations include a plurality of transmit antennas and terminals include a plurality of receive antennas to form MIMO channels. In one embodiment, a simulcasting MIMO wireless communication system includes orthogonal frequency division multiplexing (OFDM). This arrangement achieves the spectral efficiency advantages of OFDM and simulcasting.
摘要翻译： 无线多输入多输出（MIMO）通信系统包括信令同时广播。 基站包括多个发射天线，并且终端包括多个接收天线以形成MIMO信道。 在一个实施例中，同时广播的MIMO无线通信系统包括正交频分复用（OFDM）。 这种安排实现了OFDM和同时播送的频谱效率优势。
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公开(公告)号：US20120321023A9
公开(公告)日：2012-12-20
申请号：US13296610
申请日：2011-11-15
IPC分类号： H04L27/06
CPC分类号： H04L27/2601 , H04L1/0618
摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
摘要翻译： MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。
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公开(公告)号：US20120057661A1
公开(公告)日：2012-03-08
申请号：US13296610
申请日：2011-11-15
IPC分类号： H04L27/06
CPC分类号： H04L27/2601 , H04L1/0618
摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
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公开(公告)号：US20090003489A1
公开(公告)日：2009-01-01
申请号：US12151419
申请日：2008-05-06
申请人： Ye Li , Nelson Ray Sollenberger
发明人： Ye Li , Nelson Ray Sollenberger
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04L5/023 , H04L25/0204 , H04L25/0242
摘要： An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is applied to develop an Eigen matrix U that is used in developing estimates of the channels. Those channel estimates are used in the receiver to develop the output signals.
摘要翻译： 通过对传输信道采用简化的延迟函数来实现改进的OFDM接收机。 简化的延迟函数产生一个简化的频域相关性，用于开发用于开发信道估计的特征矩阵U。 在接收机中使用这些信道估计来开发输出信号。
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公开(公告)号：US08121022B2
公开(公告)日：2012-02-21
申请号：US12621335
申请日：2009-11-18
IPC分类号： H04J11/00
CPC分类号： H04L27/2601 , H04L1/0618
摘要： A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.
摘要翻译： MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。
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