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81. 发明授权

US08379782B2 Mobile radio channel estimation 有权
标题翻译：移动无线电信道估计
公开(公告)号：US08379782B2
公开(公告)日：2013-02-19
申请号：US12478473
申请日：2009-06-04
申请人： Paul Wilkinson Dent , Leonid Krasny
发明人： Paul Wilkinson Dent , Leonid Krasny
IPC分类号： H04B1/10
CPC分类号： H04L25/0202
摘要： The described method characterizes scattering objects in a wireless channel. The present invention determines non-equally spaced path delays and Doppler parameters for a plurality of scattering objects in a wireless channel. More particularly, a frequency-to-time transform applied to a plurality of OFDM pilot samples received over a plurality of OFDM symbol periods generates a set of non-equally spaced path delays and a set of associated complex delay coefficients. Further, a time-to-frequency transform applied to the complex delay coefficients determined for one path delay over multiple OFDM symbol periods generates a set of Doppler parameters comprising a plurality of non-equally spaced Doppler frequencies and their corresponding scattering coefficients for that path delay.
摘要翻译：所描述的方法表征无线信道中的散射物体。本发明为无线信道中的多个散射物体确定不等间距的路径延迟和多普勒参数。更具体地，应用于在多个OFDM符号周期中接收的多个OFDM导频样本的频率 - 时间变换产生一组不等间距的路径延迟和一组相关联的复延迟系数。此外，应用于针对多个OFDM符号周期上的一个路径延迟确定的复数延迟系数的时间 - 频率变换产生一组多普勒参数，其包括多个非等距多普勒频率及其对于该路径延迟的相应散射系数。

82. 发明授权

US08379773B2 Method and apparatus for enhanced channel estimation in wireless communication systems 有权
标题翻译：用于在无线通信系统中增强信道估计的方法和装置
公开(公告)号：US08379773B2
公开(公告)日：2013-02-19
申请号：US12489924
申请日：2009-06-23
申请人： Leonid Krasny , Jiann-Ching Guey
发明人： Leonid Krasny , Jiann-Ching Guey
IPC分类号： H04L27/06
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/0218 , H04L25/022 , H04L25/024
摘要： A method and apparatus for channel estimation based on extracting channel information, including noise spectral density, from a received signal, and advantageously exploiting that information for improved channel estimation accuracy. One embodiment is directed to a method of generating channel estimates in a wireless communication receiver, for processing a received communication signal. The method includes generating first channel estimates from a set of pilot observations obtained from the received communication signal, using a first channel estimation process that is not dependent on knowledge of channel statistics. The method further includes estimating channel statistics and a noise variance from the first channel estimates, and generating second channel estimates from the set of pilot observations, the estimated channel statistics, and the estimated noise variance, using a second channel estimation process that is dependent on knowledge of the channel statistics.
摘要翻译：一种用于信道估计的方法和装置，其基于从接收信号中提取包括噪声频谱密度的信道信息，并且有利地利用该信息以改善信道估计精度。一个实施例涉及在无线通信接收机中产生信道估计的方法，用于处理接收到的通信信号。该方法包括使用不依赖于信道统计知识的第一信道估计过程从从所接收的通信信号获得的一组导频观测中产生第一信道估计。该方法还包括从第一信道估计估计信道统计和噪声方差，以及使用依赖于第二信道估计过程的第二信道估计过程从所述导频观测集合，所估计的信道统计信息和估计的噪声方差产生第二信道估计渠道统计知识。

83. 发明授权

US08116710B2 Continuous sequential scatterer estimation 有权
标题翻译：连续顺序散射体估计
公开(公告)号：US08116710B2
公开(公告)日：2012-02-14
申请号：US12478520
申请日：2009-06-04
申请人： Paul Wilkinson Dent , Leonid Krasny
发明人： Paul Wilkinson Dent , Leonid Krasny
IPC分类号： H04B17/00
CPC分类号： H04L25/022 , H04L25/0222 , H04L25/0236 , H04L25/0248 , H04L25/03101
摘要： The present invention uses newly received signal samples to update previously determined scatterer parameters, and therefore, reduces the processing effort required for characterizing scattering objects in a wireless channel. Broadly, the present invention determines a first set of scatterer parameters based on signal samples derived from signals received during one or more previous time intervals, and determines an updated set of scatterer parameters for a subsequent time interval based on the first set of scatterer parameters and the new signal samples. In one exemplary embodiment, the receiver uses a continuous sequential update process, e.g., a per-symbol-period inverse Prony process, to update the scatterer parameters. In another exemplar embodiment, the receiver uses an integrated Doppler approach to update the scatterer parameters.
摘要翻译：本发明使用新接收的信号样本来更新先前确定的散射体参数，因此减少了在无线信道中表征散射物体所需的处理努力。广义上，本发明基于从在一个或多个先前时间间隔期间接收的信号导出的信号样本来确定第一组散射体参数，并且基于第一组散射体参数确定用于随后时间间隔的更新的散射体参数集合，以及新的信号样本。在一个示例性实施例中，接收机使用连续的顺序更新过程，例如每符号周期逆Prony过程来更新散射体参数。在另一示例性实施例中，接收机使用综合多普勒方法来更新散射体参数。

84. 发明申请

US20110158361A1 RADIO CHANNEL ANALYZER TO DETERMINE DOPPLER SHIFTS ACROSS MULTIPLE FREQUENCIES OF A WIDEBAND SIGNAL 有权
标题翻译：无线电频道分析仪用于确定宽带信号的多个频率的多普勒频移
公开(公告)号：US20110158361A1
公开(公告)日：2011-06-30
申请号：US12650201
申请日：2009-12-30
申请人： Paul W. Dent , Leonid Krasny
发明人： Paul W. Dent , Leonid Krasny
IPC分类号： H04B7/10
CPC分类号： H04L25/022 , H04L25/0222 , H04L25/0232
摘要： A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times. A second processing unit subsequently processes the complex wave amplitudes to determine complex scattering coefficients, where each complex scattering coefficient corresponds to a respective scattering object in the wireless communication channel.
摘要翻译：本文描述的接收机和接收处理方法通过校正多普勒频移（或延迟变化率）在接收信号的信号带宽内对于每个频率保持恒定的假设来提高信道估计的精度。为此，根据本发明的接收机包括具有多个处理单元的信道处理器。第一处理单元处理在多个不同信号时间（或从其估计的复数传播信道系数）内在信号带宽内的多个频率中的每一个接收的参考值（例如，导频信号），以确定一组复波幅度对于信号带宽中的多个频率中的每一个或针对不同信号时间的每一个，第二处理单元随后处理复波幅度以确定复散射系数，其中每个复散射系数对应于无线通信信道中的相应散射物体。

85. 发明申请

US20100322357A1 METHOD AND APPARATUS FOR ENHANCED CHANNEL ESTIMATION IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中增强信道估计的方法与装置
公开(公告)号：US20100322357A1
公开(公告)日：2010-12-23
申请号：US12489924
申请日：2009-06-23
申请人： Leonid Krasny , Jiann-Ching Guey
发明人： Leonid Krasny , Jiann-Ching Guey
IPC分类号： H04L27/06 , H04B1/10
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/0218 , H04L25/022 , H04L25/024
摘要： A method and apparatus for channel estimation based on extracting channel information, including noise spectral density, from a received signal, and advantageously exploiting that information for improved channel estimation accuracy. One embodiment is directed to a method of generating channel estimates in a wireless communication receiver, for processing a received communication signal. The method includes generating first channel estimates from a set of pilot observations obtained from the received communication signal, using a first channel estimation process that is not dependent on knowledge of channel statistics. The method further includes estimating channel statistics and a noise variance from the first channel estimates, and generating second channel estimates from the set of pilot observations, the estimated channel statistics, and the estimated noise variance, using a second channel estimation process that is dependent on knowledge of the channel statistics.
摘要翻译：一种用于信道估计的方法和装置，其基于从接收信号中提取包括噪声频谱密度的信道信息，并且有利地利用该信息以改善信道估计精度。一个实施例涉及在无线通信接收机中产生信道估计的方法，用于处理接收到的通信信号。该方法包括使用不依赖于信道统计知识的第一信道估计过程从从所接收的通信信号获得的一组导频观测中产生第一信道估计。该方法还包括从第一信道估计估计信道统计和噪声方差，以及使用依赖于第二信道估计过程的第二信道估计过程从所述导频观测集合，所估计的信道统计信息和估计的噪声方差产生第二信道估计渠道统计知识。

86. 发明申请

US20100311350A1 CONTINUOUS SEQUENTIAL SCATTERER ESTIMATION 有权
标题翻译：连续序列散射估计
公开(公告)号：US20100311350A1
公开(公告)日：2010-12-09
申请号：US12478520
申请日：2009-06-04
申请人： Paul Wilkinson Dent , Leonid Krasny
发明人： Paul Wilkinson Dent , Leonid Krasny
IPC分类号： H04B17/00
CPC分类号： H04L25/022 , H04L25/0222 , H04L25/0236 , H04L25/0248 , H04L25/03101
摘要： The present invention uses newly received signal samples to update previously determined scatterer parameters, and therefore, reduces the processing effort required for characterizing scattering objects in a wireless channel. Broadly, the present invention determines a first set of scatterer parameters based on signal samples derived from signals received during one or more previous time intervals, and determines an updated set of scatterer parameters for a subsequent time interval based on the first set of scatterer parameters and the new signal samples. In one exemplary embodiment, the receiver uses a continuous sequential update process, e.g., a per-symbol-period inverse Prony process, to update the scatterer parameters. In another exemplar embodiment, the receiver uses an integrated Doppler approach to update the scatterer parameters.
摘要翻译：本发明使用新接收的信号样本来更新先前确定的散射体参数，因此减少了在无线信道中表征散射物体所需的处理努力。广义上，本发明基于从在一个或多个先前时间间隔期间接收的信号导出的信号样本来确定第一组散射体参数，并且基于第一组散射体参数确定用于随后时间间隔的更新的散射体参数集合，以及新的信号样本。在一个示例性实施例中，接收机使用连续的顺序更新过程，例如每符号周期逆Prony过程来更新散射体参数。在另一示例性实施例中，接收机使用综合多普勒方法来更新散射体参数。

87. 发明申请

US20100309994A1 MOBILE RADIO CHANNEL ESTIMATION 有权
标题翻译：移动无线电通道估计
公开(公告)号：US20100309994A1
公开(公告)日：2010-12-09
申请号：US12478473
申请日：2009-06-04
申请人： Paul Wilkinson Dent , Leonid Krasny
发明人： Paul Wilkinson Dent , Leonid Krasny
IPC分类号： H04L27/28 , H03D1/06 , H04L27/06 , H04B1/10
CPC分类号： H04L25/0202
摘要： The method described herein characterizes scattering objects in a wireless channel. Broadly, the present invention determines non-equally spaced path delays and Doppler parameters for a plurality of scattering objects in a wireless channel. More particularly, a frequency-to-time transform applied to a plurality of OFDM pilot samples received over a plurality of OFDM symbol periods generates a set of non-equally spaced path delays and a set of associated complex delay coefficients. Further, a time-to-frequency transform applied to the complex delay coefficients determined for one path delay over multiple OFDM symbol periods generates a set of Doppler parameters comprising a plurality of non-equally spaced Doppler frequencies and their corresponding scattering coefficients for that path delay.
摘要翻译：本文描述的方法表征无线信道中的散射物体。广泛地，本发明确定无线信道中的多个散射物体的不等间距的路径延迟和多普勒参数。更具体地，应用于在多个OFDM符号周期中接收的多个OFDM导频样本的频率 - 时间变换产生一组不等间距的路径延迟和一组相关联的复延迟系数。此外，应用于针对多个OFDM符号周期上的一个路径延迟确定的复数延迟系数的时间 - 频率变换产生一组多普勒参数，其包括多个非等距多普勒频率及其对于该路径延迟的相应散射系数。

88. 发明申请

US20100272207A1 Using Spatial Properties of MIMO Channels for Enhanced Channel Estimation in MIMO Systems 有权
标题翻译：使用MIMO信道的空间属性来增强MIMO系统中的信道估计
公开(公告)号：US20100272207A1
公开(公告)日：2010-10-28
申请号：US12810360
申请日：2007-12-27
申请人： Kambiz Zangi , Leonid Krasny
发明人： Kambiz Zangi , Leonid Krasny
IPC分类号： H04B7/02
CPC分类号： H04B7/0413 , H04L5/0048 , H04L25/0204 , H04L25/0224 , H04L25/0244 , H04L27/2647
摘要： An apparatus for estimating a channel response associated with a multiple input/multiple output (MIMO) system includes an antenna that receives multiple pilot symbols, each of the multiple pilot symbols transmitted from a different one of multiple transmit antennas of a transmitter in the MIMO system. The apparatus further includes a channel estimator that determines spatial, time and frequency correlations of channels of the MIMO system among the multiple transmit antennas when estimating a channel response associated with the MIMO system based on multiple ones of the received plurality of pilot symbols.
摘要翻译：用于估计与多输入/多输出（MIMO）系统相关联的信道响应的装置包括：天线，其接收多个导频符号，所述多个导频符号中的每一个从MIMO系统中的发射机的多个发射天线中的不同发射天线发送。该装置还包括信道估计器，其基于接收到的多个导频符号中的多个导频符号估计与MIMO系统相关联的信道响应，确定MIMO系统在多个发射天线中的信道的空间，时间和频率相关性。

89. 发明申请

US20100215113A1 Method and System for Pre-Coding For Frequency Selective Radio Communication Channel 有权
标题翻译：用于频率选择无线电通信信道的预编码方法和系统
公开(公告)号：US20100215113A1
公开(公告)日：2010-08-26
申请号：US12682706
申请日：2007-10-15
申请人： Ulf Lindgren , Leonid Krasny , Henrik Sahlin
发明人： Ulf Lindgren , Leonid Krasny , Henrik Sahlin
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04L25/03343 , H04B7/0617 , H04B7/0626 , H04L2025/03426 , H04L2025/03802
摘要： A method for processing signals to be transmitted in a MIMO system from a transmitter having at least two transmitting antennas to a receiver having at least two receiving antennas on a frequency selective communication channel. The method comprises estimating elements of a channel matrix H(q−1) based on time delays and complex valued coefficients associated with the communication channel to provide an estimated frequency variation function of each element of the channel matrix, and pre-coding the signals to be transmitted based on the estimated frequency variation function for each element. The invention also relates to a MIMO system; and a transmitter and a receiver for use in a MIMO system.
摘要翻译：一种用于处理在MIMO系统中从具有至少两个发射天线的发射机发射到在频率选择性通信信道上具有至少两个接收天线的接收机的信号的方法。该方法包括基于与通信信道相关联的时间延迟和复值系数来估计信道矩阵H（q-1）的元素，以提供信道矩阵的每个元素的估计频率变化函数，并将该信号预编码为基于每个元素的估计频率变化函数来发送。本发明还涉及MIMO系统; 以及用于MIMO系统的发射机和接收机。

90. 发明授权

US07711035B2 Method and apparatus for suppressing communication signal interference 有权
标题翻译：用于抑制通信信号干扰的方法和装置
公开(公告)号：US07711035B2
公开(公告)日：2010-05-04
申请号：US10943274
申请日：2004-09-17
申请人： Douglas A. Cairns , Leonid Krasny
发明人： Douglas A. Cairns , Leonid Krasny
IPC分类号： H04B1/00
CPC分类号： H04L25/03006
摘要： A frequency domain representation of a whitening filter is made to depend on essentially one unknown, namely, a scaling factor that is based on an estimated ratio of total base station power to the power spectral density (PSD) of inter-cell interference plus noise. In turn, that scaling factor can be computed based on the modeling terms used in a parametric model of the impairment correlations for a received communication signal. Preferably, the model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameter. Further, the scaling factor can be computed by directly estimating total base station transmit power and the PSD of inter-cell interference plus noise. In any case, the whitening filter can be used in whitening a received communication signal in conjunction with channel equalization processing or RAKE receiver processing, for example.
摘要翻译：使白化滤波器的频域表示依赖于基本上一个未知数，即基于总基站功率与小区间干扰加上噪声的功率谱密度（PSD）的估计比的缩放因子。反过来，可以基于在接收到的通信信号的损害相关性的参数模型中使用的建模项来计算该缩放因子。优选地，该模型包括由第一模型拟合参数缩放的干扰损害项和由第二模型拟合参数缩放的噪声损伤项。此外，可以通过直接估计总基站发射功率和小区间干扰加上噪声的PSD来计算缩放因子。在任何情况下，例如，白化滤波器可用于结合信道均衡处理或RAKE接收机处理来使接收到的通信信号变白。

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