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1.发明授权Symbol estimation-based decorrelator for estimating spatial signatures in a wireless communications system 有权用于估计无线通信系统中的空间签名的基于符号估计的去相关器公开(公告)号：US07047045B2
公开(公告)日：2006-05-16
申请号：US10387718
申请日：2003-03-13
CPC分类号： H04B7/0854 , H04B7/0615
摘要： Spatial and temporal characteristics of received radio signals in a multiple user radio system can be estimated based on signals received from the users. In one embodiment, the invention includes collecting measurements of radio frequency signals received at different elements of an antenna system over time, the received signals corresponding at least in part to transmissions received from a system user, collecting representations of the transmissions of the system user, cross-correlating the collected measurements and the collected representations, and comparing the cross-correlation to the collected measurements to form a characterization of the radio channel traversed by transmissions of the system user.
摘要翻译： 可以基于从用户接收的信号来估计多用户无线电系统中接收的无线电信号的空间和时间特性。 在一个实施例中，本发明包括收集在时间上在天线系统的不同元件处接收的射频信号的测量，所接收的信号至少部分地对应于从系统用户接收的传输，收集系统用户的传输的表示， 将收集的测量和收集的表示互相关，并将互相关与收集的测量进行比较，以形成通过系统用户的传输所穿过的无线电信道的表征。
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2.发明授权Symbol estimation-based decorrelator for directing beams and nulls to remote users in a wireless communications system 有权基于符号估计的去相关器，用于在无线通信系统中将波束和空值引导到远程用户公开(公告)号：US07310538B2
公开(公告)日：2007-12-18
申请号：US11249903
申请日：2005-10-12
CPC分类号： H04B7/0854 , H04B7/0615
摘要： Spatial and temporal characteristics of received radio signals in a multiple user radio system can be estimated based on signals received from the users. In one embodiment, the invention includes collecting measurements of radio frequency signals received at different elements of an antenna system over time, the received signals corresponding at least in part to transmissions received from a system user, collecting representations of the transmissions of the system user, and comparing the representations to the collected measurements to form a spatial characterization of the radio channel traversed by transmissions of the system user in which the elements of the spatial characterization represent forming a beam in the direction of the system user and directing nulls to interferers.
摘要翻译： 可以基于从用户接收的信号来估计多用户无线电系统中接收的无线电信号的空间和时间特性。 在一个实施例中，本发明包括收集在时间上在天线系统的不同元件处接收的射频信号的测量，所接收的信号至少部分地对应于从系统用户接收的传输，收集系统用户的传输的表示， 以及将所述表示与所收集的测量结果进行比较，以形成由系统用户的传输穿过的无线电信道的空间表征，其中空间特征的元素表示在系统用户的方向上形成一个波束并将空值引导到干扰源。
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3.发明授权Hard decision-based decorrelator for estimating spatial signatures in a wireless communications system 失效用于估计无线通信系统中的空间签名的基于硬决策的去相关器公开(公告)号：US06950630B2
公开(公告)日：2005-09-27
申请号：US10387933
申请日：2003-03-13
CPC分类号： H04B7/0615 , H04B1/71052 , H04B7/0851 , H04B7/0854 , H04L25/0202
摘要： Spatial and temporal characteristics of received radio signals in a multiple user radio system can be estimated based on signals received from the users. In one embodiment, the invention includes measuring radio frequency signals received at different elements of an antenna system over time, the received signals corresponding at least in part to transmissions received from a system user, accumulating the signal measurements into a first matrix, generating a second matrix representing the transmissions of the system user, cross-correlating the first and second matrices to form a third matrix, and multiplying the third matrix with a product of the second matrix to form a fourth matrix in which the elements of the fourth matrix characterize the radio channel traversed by transmissions of the system user.
摘要翻译： 可以基于从用户接收的信号来估计多用户无线电系统中接收的无线电信号的空间和时间特性。 在一个实施例中，本发明包括测量在时间上在天线系统的不同元件处接收的射频信号，所接收的信号至少部分对应于从系统用户接收的传输，将信号测量累积到第一矩阵中，产生第二 表示系统用户的传输的矩阵，将第一和第二矩阵交叉相关以形成第三矩阵，以及将第三矩阵与第二矩阵的乘积相乘以形成第四矩阵，其中第四矩阵的元素表征 无线电通道由系统用户的传输遍历。
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公开(公告)号：US07593693B1
公开(公告)日：2009-09-22
申请号：US11375500
申请日：2006-03-13
申请人： Athanasios A. Kasapi , Mitchell D. Trott , Peter G. Khoury , Adam B. Kerr , Serge Barbosa Da Torre
发明人： Athanasios A. Kasapi , Mitchell D. Trott , Peter G. Khoury , Adam B. Kerr , Serge Barbosa Da Torre
CPC分类号： H04B7/0854
摘要： Methods and apparatus for calculating spatial processing strategies in adaptive antenna array processing systems. Reference signal quality, intersymbol interference, data processed and received signal quality can be determined by burst type or remote device type and used to determine a synthetic signal level for use in developing a spatial processing strategy. A synthetic signal have an isotropically distributed component can be added to the antennas in the array or the diagonal elements of the received signal covariance matrix to develop uplink and downlink spatial processing strategies. Different synthetic signals at different signal levels can be used to develop different uplink and downlink spatial processing strategies. The downlink signal level can be larger than the uplink signal level. Uplink and downlink processing strategies can be developed in substantially the same way.
摘要翻译： 自适应天线阵列处理系统中空间处理策略的计算方法与装置。 参考信号质量，码间干扰，数据处理和接收信号质量可以通过突发类型或远程设备类型确定，并用于确定用于开发空间处理策略的合成信号电平。 合成信号具有各向同性分布的分量可以添加到阵列中的天线或接收信号协方差矩阵的对角元素，以开发上行链路和下行链路空间处理策略。 不同信号级别的不同合成信号可用于开发不同的上行链路和下行链路空间处理策略。 下行链路信号电平可以大于上行链路信号电平。 上行链路和下行链路处理策略可以以相同的方式开发。
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公开(公告)号：US07039363B1
公开(公告)日：2006-05-02
申请号：US09967896
申请日：2001-09-28
申请人： Athanasios A. Kasapi , Mitchell D. Trott , Peter G. Khoury , Adam B. Kerr , Serge Barbosa Da Torre
发明人： Athanasios A. Kasapi , Mitchell D. Trott , Peter G. Khoury , Adam B. Kerr , Serge Barbosa Da Torre
CPC分类号： H04B7/0854
摘要： Methods and apparatus for calculating spatial processing strategies in adaptive antenna array processing systems. Reference signal quality, intersymbol interference, data processed and received signal quality can be determined by burst type or remote device type and used to determine a synthetic signal level for use in developing a spatial processing strategy. A synthetic signal have an isotropically distributed component can be added to the antennas in the array or the diagonal elements of the received signal covariance matrix to develop uplink and downlink spatial processing strategies. Different synthetic signals at different signal levels can be used to develop different uplink and downlink spatial processing strategies. The downlink signal level can be larger than the uplink signal level. Uplink and downlink processing strategies can be developed in substantially the same way.
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6.发明授权Methods for reliable user switchback on a PHS spatial division multiple access channel 失效用于在PHS空分多址通道上进行可靠用户切换的方法公开(公告)号：US07020107B2
公开(公告)日：2006-03-28
申请号：US10348923
申请日：2003-01-21
IPC分类号： H04Q7/00
CPC分类号： H04W56/001 , H04W36/08
摘要： An embodiment of the invention provides a method for effecting switchback on a spatial division multiple access (SDMA) PHS channel. A communication signal is broadcast over each of one or more SDMA channels of a multi-access channel to one or more corresponding user terminals. A set of transmit spatial weights is determined for a synchronization burst to a user terminal attempting to reestablish communication over an SDMA channel of the multi-access channel. The set of transmit spatial weights is determined such that interference caused by one or more communication signals to the synchronization burst is reduced.
摘要翻译： 本发明的实施例提供了一种用于在空分多址（SDMA）PHS信道上实现切换的方法。 通信信号通过多访问信道的一个或多个SDMA信道中的每一个广播到一个或多个对应的用户终端。 确定一组发送空间权重用于同步脉冲串到尝试通过多访问信道的SDMA信道重新建立通信的用户终端。 确定发送空间权重的集合，使得由一个或多个通信信号对同步突发造成的干扰减少。
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7.发明授权公开(公告)号：US06570527B1
公开(公告)日：2003-05-27
申请号：US09967258
申请日：2001-09-28
IPC分类号： G01S740
CPC分类号： H04B7/12 , H01Q3/267 , H04B7/0613 , H04B7/0837 , H04B17/12 , H04B17/21
摘要： A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive chains, respectively. In one embodiment, the invention includes an antenna array adapted to transmit and receive radio communications signals with a plurality of other terminals, a transmit chain to transmit a calibration signal through the antenna array to a transponder on at least two different frequency bands, and a receive chain to receive through the antenna array a transponder signal from the transponder, the transponder signal being received on at least two different frequency bands and being based on the calibration signal. A signal processor determines a frequency dependent calibration vector based on the at least two frequency bands of the transponder signal as received through the receive chain by comparing relative characteristics for the transponder signal at a first one of the at least two frequencies to relative characteristics for the transponder signal at a second one of the at least two frequencies.
摘要翻译： 提供了一种方法和装置，其分别仅使用发射链和接收链之间的差分相位和幅度来确定无线电通信系统的一组发射或接收链的频率相关校准矢量。 在一个实施例中，本发明包括适于与多个其他终端发送和接收无线电通信信号的天线阵列，通过天线阵列将校准信号发射到至少两个不同频带上的应答器的发射链，以及 接收链，以通过天线阵列接收来自应答器的应答器信号，应答器信号在至少两个不同频带上被接收并且基于校准信号。 信号处理器基于通过接收链接收的应答器信号的至少两个频带来确定与频率相关的校准矢量，通过将在至少两个频率中的第一个频率上的应答器信号的相对特性相对于 在所述至少两个频率中的第二个频率处的应答器信号。
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8.发明授权Method and apparatus for correcting gradient system and static magnetic field in magnetic resonance imaging 失效用于校正磁共振成像中梯度系统和静磁场的方法和装置
公开(公告)号：US5905377A
公开(公告)日：1999-05-18
申请号：US690528
申请日：1996-07-31
申请人： Adam B. Kerr , John M. Pauly
发明人： Adam B. Kerr , John M. Pauly
IPC分类号： G01R33/389 , G01R33/565 , G01V3/00
CPC分类号： G01R33/389 , G01R33/56518 , G01R33/56563
摘要： Time-varying error between a prescribed magnetic field and an actual magnetic field is identified from a self-encoding technique and the measurement of detected responses to various magnetic read-out gradients. The gradients can be a sinusoidal, step function, or other suitable form which enables the actual responses to be obtained from which transfer functions can be defined. In one embodiment, the data can effectively frequency sample the transfer function of the system. A gradient-recalled echo occurs each time the self-encode lobe is refocussed, and the phase of the echo peak is used to estimate the time variation of the main magnetic field, B.sub.0 (t).
摘要翻译： 从自编码技术和对各种磁读出梯度的检测到的响应的测量来识别规定磁场和实际磁场之间的时变误差。 梯度可以是正弦，阶梯函数或其他合适的形式，其使得能够从可以定义传递函数获得实际响应。 在一个实施例中，数据可以有效地对系统的传递函数进行频率采样。 每次自编码波瓣重新聚焦时都会发生梯度回波，回波峰值的相位用于估计主磁场B0（t）的时间变化。
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9.发明授权Method and apparatus for B.sub.0 eddy current compensation by B.sub.1 phase modulation 失效通过B1相位调制进行B0涡流补偿的方法和装置
公开(公告)号：US5856744A
公开(公告)日：1999-01-05
申请号：US772684
申请日：1996-12-23
申请人： Walter F. Block , Adam B. Kerr , John M. Pauly
发明人： Walter F. Block , Adam B. Kerr , John M. Pauly
IPC分类号： G01R33/565 , G01V3/00
CPC分类号： G01R33/56518
摘要： In accordance with the invention, spatially invariant B.sub.0 eddy currents induced by a slice-selection gradient, G.sub.Z in an MRI system, are compensated by phase modulating the RF excitation pulse with a compensating function. In one embodiment, the compensating function is based on a measure of the integral of the B.sub.0 eddy current. In another embodiment, a scaled copy of the excitation gradient can be used as an approximation of the compensating function.
摘要翻译： 根据本发明，通过利用补偿功能对RF激励脉冲进行相位调制来补偿由MRI系统中的切片选择梯度GZ引起的空间不变的B0涡流。 在一个实施例中，补偿功能基于B0涡流的积分的度量。 在另一个实施例中，可以使用激励梯度的缩放副本作为补偿功能的近似。
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10.发明授权Selection of user-specific transmission parameters for optimization of transmit performance in wireless communications using a common pilot channel 有权选择用户特定的传输参数，以优化使用公共导频信道的无线通信中的传输性能公开(公告)号：US07342912B1
公开(公告)日：2008-03-11
申请号：US10187026
申请日：2002-06-28
CPC分类号： H04B7/0615 , H04L25/0224
摘要： A method and apparatus are provided that optimizes a transmitted user-specific signal. In one embodiment, the invention includes receiving signals from a remote radio, deriving estimates of receive channels corresponding to the received signals using the received signals, deriving a model of an expected transmit channel to the remote radio based on the receive channel estimates, deriving a set of transmit parameters to be applied to an array of transmit antennas to transmit a signal to the remote radio by optimizing a transmit power criteria using the model of the expected transmit channel and constraints on the estimated quality of a signal transmitted over the expected transmit channel, and transmitting to the remote radio by applying the derived set of transmit parameters to the transmit antenna array.
摘要翻译： 提供了一种优化发送的用户特定信号的方法和装置。 在一个实施例中，本发明包括从远程无线电接收信号，使用接收到的信号导出对应于接收信号的接收信道的估计，基于接收信道估计导出到远程无线电的期望发射信道的模型，导出 通过使用预期发射信道的模型优化发射功率标准并对通过预期发射信道传输的信号的估计质量的约束来将应用于发射天线阵列的发射参数集合发射到远程无线电信号。 并且通过将衍生的发射参数集合应用于发射天线阵列来发射到远程无线电装置。
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