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1. 发明授权

US06983127B1 Statistical calibration of wireless base stations 失效
标题翻译：无线基站的统计校准
公开(公告)号：US06983127B1
公开(公告)日：2006-01-03
申请号：US10209500
申请日：2002-07-31
申请人： Serge Barbosa Da Torre , David M. Parish , Athos Kasapi , Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
发明人： Serge Barbosa Da Torre , David M. Parish , Athos Kasapi , Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
IPC分类号： H04B17/00
CPC分类号： H04B17/20 , H04B7/04 , H04B7/0634 , H04B17/10
摘要： The present invention allows a radio receiver or a transmitter, with a plurality of antennas configured into an array, to be calibrated. In one embodiment, the method includes receiving a plurality of signals from a plurality of remote transmitters at the antenna array, sampling the signals received at at least two antennas of the array, computing a relative phase and amplitude of the sampled signals for each antenna, and computing calibration coefficients based on the relative phase and amplitude for the plurality of sampled signals from the plurality of remote transmitters for each antenna.
摘要翻译：本发明允许校准具有配置成阵列的多个天线的无线电接收机或发射机。在一个实施例中，该方法包括从天线阵列处的多个远程发射机接收多个信号，对在阵列的至少两个天线处接收的信号进行采样，计算每个天线的采样信号的相对相位和幅度，以及基于每个天线的来自多个远程发射机的多个采样信号的相对相位和幅度来计算校准系数。

2. 发明授权

US07593693B1 Adaptive antenna array with programmable sensitivity 失效
标题翻译：具有可编程灵敏度的自适应天线阵列
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
IPC分类号： H04B17/00 , H04B1/00 , H04B15/00
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。

3. 发明授权

US07039363B1 Adaptive antenna array with programmable sensitivity 有权
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
IPC分类号： H04B17/00 , H04B7/212 , H04J3/12
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.

4. 发明授权

US06570527B1 Calibration of differential frequency-dependent characteristics of a radio communications system 有权
标题翻译：校准无线电通信系统的差分频率相关特性
公开(公告)号：US06570527B1
公开(公告)日：2003-05-27
申请号：US09967258
申请日：2001-09-28
申请人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
发明人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
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。

5. 发明授权

US07342912B1 Selection of user-specific transmission parameters for optimization of transmit performance in wireless communications using a common pilot channel 有权
标题翻译：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
申请人： Adam B. Kerr , Erik D. Lindskog , Christopher Brunner , Mitchell D. Trott
发明人： Adam B. Kerr , Erik D. Lindskog , Christopher Brunner , Mitchell D. Trott
IPC分类号： H04B7/212 , H04B1/76
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。

6. 发明授权

US06788948B2 Frequency dependent calibration of a wideband radio system using narrowband channels 失效
标题翻译：使用窄带信道的宽带无线电系统的频率相关校准
公开(公告)号：US06788948B2
公开(公告)日：2004-09-07
申请号：US09967767
申请日：2001-09-28
申请人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
发明人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
IPC分类号： G01S1374
CPC分类号： H01Q3/267
摘要： A method and apparatus are provided that determine group delay for a set of transmit or receive chains over a wide frequency band without causing significant interference with simultaneous users of the system. In one embodiment, the invention includes an antenna array adapted to transmit and receive radio communications signals with a plurality of other terminals, the communications signals each using a particular minimum bandwidth, a transmit chain to transmit a calibration signal through the antenna array to a transponder on at least two different frequency bands within the minimum bandwidth, 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.
摘要翻译：提供了一种确定一组发射或接收链在宽频带上的组延迟而不对系统的同时用户造成显着干扰的方法和装置。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，每个使用特定最小带宽的通信信号，通过天线阵列将校准信号发射到应答器的发射链在最小带宽内的至少两个不同的频带上，以及接收链，用于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。

7. 发明授权

US06865377B1 Combined open and closed loop beam forming in a multiple array radio communication system 失效
标题翻译：在多阵列无线电通信系统中组合开和闭环波束形成
公开(公告)号：US06865377B1
公开(公告)日：2005-03-08
申请号：US10187036
申请日：2002-06-28
申请人： Erik D. Lindskog , Adam B. Kerr , Christopher Brunner , Mitchell D. Trott
发明人： Erik D. Lindskog , Adam B. Kerr , Christopher Brunner , Mitchell D. Trott
IPC分类号： H04B7/06 , H04B1/02 , H04C7/02
CPC分类号： H04B7/0634 , H04B7/0617 , H04B7/0632
摘要： A method and apparatus are provided that can combine the benefits of beamforming with transmit diversity. In one embodiment, the invention includes sampling a signal received from a remote radio at elements of an antenna array, deriving spatial parameters for transmitting a signal to the remote radio from an antenna array, sampling the signal received from the remote radio at elements of at least one additional antenna array, and deriving spatial parameters for transmitting a signal to the remote radio from the at least one additional antenna array. The invention further includes generating diversity parameters for transmitting a signal to the remote radio using each antenna array as an element of a diversity array, and transmitting a signal to the remote radio using the spatial parameters and the diversity parameters.
摘要翻译：提供了一种可以将波束成形与发射分集的优点组合的方法和装置。在一个实施例中，本发明包括对从天线阵列的元件的远程无线电接收的信号进行采样，导出用于从天线阵列向远程无线电发送信号的空间参数，至少一个附加天线阵列，以及导出用于从所述至少一个附加天线阵列向远程无线电发送信号的空间参数。本发明还包括生成用于使用每个天线阵列作为分集阵列的元件将信号发送到远程无线电的分集参数，以及使用空间参数和分集参数将信号发送到远程无线电装置。

8. 发明授权

US06747594B2 Calibration of differential frequency-dependent characteristics of a radio communications system 失效
标题翻译：校准无线电通信系统的差分频率相关特性
公开(公告)号：US06747594B2
公开(公告)日：2004-06-08
申请号：US10294948
申请日：2002-11-14
申请人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
发明人： Erik D. Lindskog , Mitchell D. Trott , Adam B. Kerr
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。

9. 发明授权

US5905377A Method and apparatus for correcting gradient system and static magnetic field in magnetic resonance imaging 失效
标题翻译：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。

10. 发明授权

US5856744A Method and apparatus for B.sub.0 eddy current compensation by B.sub.1 phase modulation 失效
标题翻译：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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