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公开(公告)号：US20050271155A1
公开(公告)日：2005-12-08
申请号：US11198381
申请日：2005-08-05
申请人： Vincent Jones , Derek Gerlach , Gregory Raleigh
发明人： Vincent Jones , Derek Gerlach , Gregory Raleigh
CPC分类号： H04L27/2647 , H04L25/0328
摘要： Systems and methods for optimally combining signals from multiple antennas to ameliorate the effects of noise and/or interference on OFDM communications are provided. In one embodiment, an initial spatial statistical characterization of interference and/or noise is based on training symbols received via each antenna. Because the transmitted values of the training symbols are already known, there is no need to estimate their transmitted value to form this initial statistical characterization. The data symbol values received via the multiple antennas are combined based on the initial spatial statistical characterization. The result of this combination step is then used to form a refined spatial statistical characterization of noise and/or interference. The received data symbol values are then recombined based on the refined spatial statistical characterization.
摘要翻译： 提供了用于最佳地组合来自多个天线的信号以改善噪声和/或干扰对OFDM通信的影响的系统和方法。 在一个实施例中，干扰和/或噪声的初始空间统计表征基于经由每个天线接收的训练符号。 因为训练符号的传输值已经是已知的，所以不需要估计它们的传输值来形成这个初始的统计特征。 经由多个天线接收的数据符号值根据初始的空间统计特征进行组合。 然后将该组合步骤的结果用于形成噪声和/或干扰的精细空间统计表征。 然后，基于精确的空间统计特征重新组合接收到的数据符号值。
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公开(公告)号：US07095791B2
公开(公告)日：2006-08-22
申请号：US11198381
申请日：2005-08-05
CPC分类号： H04L27/2647 , H04L25/0328
摘要： Systems and methods for optimally combining signals from multiple antennas to ameliorate the effects of noise and/or interference on OFDM communications are provided. In one embodiment, an initial spatial statistical characterization of interference and/or noise is based on training symbols received via each antenna. Because the transmitted values of the training symbols are already known, there is no need to estimate their transmitted value to form this initial statistical characterization. The data symbol values received via the multiple antennas are combined based on the initial spatial statistical characterization. The result of this combination step is then used to form a refined spatial statistical characterization of noise and/or interference. The received data symbol values are then recombined based on the refined spatial statistical characterization.
摘要翻译： 提供了用于最佳地组合来自多个天线的信号以改善噪声和/或干扰对OFDM通信的影响的系统和方法。 在一个实施例中，干扰和/或噪声的初始空间统计表征基于经由每个天线接收的训练符号。 因为训练符号的传输值已经是已知的，所以不需要估计它们的传输值来形成这个初始的统计特征。 经由多个天线接收的数据符号值根据初始的空间统计特征进行组合。 然后将该组合步骤的结果用于形成噪声和/或干扰的精细空间统计表征。 然后，基于精确的空间统计特征重新组合接收到的数据符号值。
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公开(公告)号：US06973134B1
公开(公告)日：2005-12-06
申请号：US09565669
申请日：2000-05-04
CPC分类号： H04L27/2647 , H04L25/0328
摘要： Systems and methods for optimally combining signals from multiple antennas to ameliorate the effects of noise and/or interference on OFDM communications are provided. In one embodiment, an initial spatial statistical characterization of interference and/or noise is based on training symbols received via each antenna. Because the transmitted values of the training symbols are already known, there is no need to estimate their transmitted value to form this initial statistical characterization. The data symbol values received via the multiple antennas are combined based on the initial spatial statistical characterization. The result of this combination step is then used to form a refined spatial statistical characterization of noise and/or interference. The received data symbol values are then recombined based on the refined spatial statistical characterization.
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公开(公告)号：US06408165B1
公开(公告)日：2002-06-18
申请号：US09348719
申请日：1999-07-06
IPC分类号： H04B100
CPC分类号： H04W52/221 , H04W52/223 , H04W52/225
摘要： Improved adjustment of transmission power in a communication system is provided. In one embodiment, in a point to multipoint communication system, transmission power of a subscriber unit is controlled based on power measurements made at a central access point. Power measurement information based on transmissions occurring at irregular intervals may be combined in a beneficial manner to control transmission output power. In one embodiment, a power regulation process determines a series of difference values indicating the differences between desired received power level at the central access point and measured received power level. A smoothing process is applied to the difference values. One or more parameters of the smoothing process vary with elapsed time since a last available power measurement.
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公开(公告)号：US06757241B1
公开(公告)日：2004-06-29
申请号：US10187405
申请日：2002-06-28
IPC分类号： H04J1100
CPC分类号： H04L27/2647 , H04B7/0845 , H04B7/12
摘要： A spatial processor that exploits signals that arrive via multiple outputs of a communication channel to provide soft decision values useful to a trellis or Viterbi decoder. A spatial processor may take into account a statistical characterization of interference as received via the multiple channel outputs. Spatial processor operation may also be optimized to operate in conjunction with orthogonal frequency division multiplexing (OFDM).
摘要翻译： 利用通过通信信道的多个输出到达的信号的空间处理器来提供对格子或维特比解码器有用的软判决值。 空间处理器可以考虑经由多通道输出接收到的干扰的统计特征。 空间处理器操作也可以被优化以与正交频分复用（OFDM）一起工作。
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公开(公告)号：US06442130B1
公开(公告)日：2002-08-27
申请号：US09234629
申请日：1999-01-21
IPC分类号： H04J1100
CPC分类号： H04L27/2647 , H04B7/0845 , H04B7/12
摘要： A spatial processor that exploits signals that arrive via multiple outputs of a communication channel to provide soft decision values useful to a trellis or Viterbi decoder. A spatial processor may take into account a statistical characterization of interference as received via the multiple channel outputs. Spatial processor operation may also be optimized to operate in conjunction with orthogonal frequency division multiplexing (OFDM).
摘要翻译： 利用通过通信信道的多个输出到达的信号的空间处理器来提供对网格或维特比解码器有用的软判决值。 空间处理器可以考虑经由多通道输出接收到的干扰的统计特征。 空间处理器操作也可以被优化以与正交频分复用（OFDM）一起工作。
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7.发明授权Method of subspace beamforming using adaptive transmitting antennas with feedback 失效使用具有反馈的自适应发射天线的子空间波束成形方法
公开(公告)号：US5634199A
公开(公告)日：1997-05-27
申请号：US424662
申请日：1995-04-17
CPC分类号： H01Q3/2605 , H04B1/126 , H04B7/0626 , H04B7/0617
摘要： A method is disclosed for using feedback to reduce crosstalk between mobile receivers in a wireless communications system comprising an adaptive transmitting antenna array. Feedback signals from the receivers are time-averaged and used to calculate a set of weight vectors that minimize crosstalk and maximize desired signal without requiring burdensome feedback rates. Beamforming diversity is combined with feedback through the use of diversity vectors. The preferred embodiment includes a method for obtaining the required feedback by exploiting the SAT circuitry present in the AMPS system currently in use. Consequently, the method may be implemented without modification to existing cellular phone handsets.
摘要翻译： 公开了一种使用反馈来减少包括自适应发射天线阵列的无线通信系统中的移动接收机之间的串扰的方法。 来自接收机的反馈信号是时间平均的，并且用于计算最小化串扰并最大化期望信号的一组权重向量，而不需要繁重的反馈速率。 波束形成分集通过使用分集向量与反馈相结合。 优选实施例包括通过利用当前使用的AMPS系统中存在的SAT电路来获得所需反馈的方法。 因此，可以在不修改现有蜂窝电话手机的情况下实现该方法。
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公开(公告)号：US07149238B2
公开(公告)日：2006-12-12
申请号：US11409437
申请日：2006-04-21
申请人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnic Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
发明人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnic Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
IPC分类号： H04B1/69
CPC分类号： H04B1/69 , H04B1/692 , H04B1/707 , H04B1/7107 , H04B7/04 , H04B2201/70702 , H04L5/0021 , H04L5/0026 , H04L5/0048 , H04L5/026 , H04L25/0228 , H04L25/03019 , H04L27/186 , H04L27/3416 , H04L2025/03414 , H04L2025/03426 , H04W16/14 , H04W88/08
摘要： A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.
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公开(公告)号：US20060193373A1
公开(公告)日：2006-08-31
申请号：US11409437
申请日：2006-04-21
申请人： Brian Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Maxwell , Robert Mechaley , Robert Naish , David Nix , David Ryan , David Stephenson
发明人： Brian Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Maxwell , Robert Mechaley , Robert Naish , David Nix , David Ryan , David Stephenson
CPC分类号： H04B1/69 , H04B1/692 , H04B1/707 , H04B1/7107 , H04B7/04 , H04B2201/70702 , H04L5/0021 , H04L5/0026 , H04L5/0048 , H04L5/026 , H04L25/0228 , H04L25/03019 , H04L27/186 , H04L27/3416 , H04L2025/03414 , H04L2025/03426 , H04W16/14 , H04W88/08
摘要： A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.
摘要翻译： 离散多媒体叠层载波扩频通信方法是基于频域扩展，包括基带信号乘以叠加的或叠加的复数正弦波载波的集合。 在优选实施例中，扩展涉及激励大的快速傅立叶变换（FFT）的信息仓。 这为中等输出FFT大小节省了大量的计算复杂度。 点对多点和多点到多点（无节点）网络拓扑是可能的。 通过利用各种光源的光谱多样性，可以包括一个代码归零方法用于干扰消除和增强的信号分离。 基本方法可以扩展为包括用于干扰消除的多元天线阵列归零方法和使用空间分离的增强信号分离。 这种方法允许适应或可以适应于无线电环境的指导和逆向传输系统。 这样的系统与带宽按需和高阶调制格式兼容，并且使用高级适配算法。 在具体实施例中，基于空中链路的频谱和空间描述之间的数学类比，以统一的操作计算自适应权重的频谱和空间分量。
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10.发明授权Priority messaging method for a discrete multitone spread spectrum communications system 失效用于离散多音频扩频通信系统的优先消息传递方法公开(公告)号：US06621851B1
公开(公告)日：2003-09-16
申请号：US09723337
申请日：2000-11-28
申请人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
发明人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
IPC分类号： H04B169
CPC分类号： H04B1/69 , H04B1/692 , H04B1/707 , H04B1/7107 , H04B7/04 , H04B2201/70702 , H04L5/0021 , H04L5/0026 , H04L5/0048 , H04L5/026 , H04L25/0228 , H04L25/03019 , H04L27/186 , H04L27/3416 , H04L2025/03414 , H04L2025/03426 , H04W16/14 , H04W88/08
摘要： A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.
摘要翻译： 离散多媒体叠层载波扩频通信方法是基于频域扩展，包括基带信号乘以叠加的或叠加的复数正弦波载波的集合。 在优选实施例中，扩展涉及激励大的快速傅立叶变换（FFT）的信息仓。 这为中等输出FFT大小节省了大量的计算复杂度。 点对多点和多点到多点（无节点）网络拓扑是可能的。 通过利用各种光源的光谱多样性，可以包括一个代码归零方法用于干扰消除和增强的信号分离。 基本方法可以扩展为包括用于干扰消除的多元天线阵列归零方法和使用空间分离的增强信号分离。 这种方法允许适应或可以适应于无线电环境的指导和逆向传输系统。 这样的系统与带宽按需和高阶调制格式兼容，并且使用高级适配算法。 在具体实施例中，基于空中链路的频谱和空间描述之间的数学类比，以统一的操作来计算自适应权重的频谱和空间分量。
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