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1. 发明授权

US5909470A Method and apparatus for decision directed demodulation using antenna arrays and spatial processing 失效
标题翻译：用于使用天线阵列和空间处理进行决策定向解调的方法和装置
公开(公告)号：US5909470A
公开(公告)日：1999-06-01
申请号：US729390
申请日：1996-10-11
申请人： Craig H. Barratt , Farhad Farzaneh , David M. Parish
发明人： Craig H. Barratt , Farhad Farzaneh , David M. Parish
IPC分类号： H01Q3/26 , H04B7/08 , H04B7/10 , H04L1/06 , H04L27/00 , H04L27/22 , H04L27/233 , H04L27/38 , H04L27/14
CPC分类号： H04L1/06 , H04L27/2332 , H04L2027/003 , H04L2027/0046 , H04L2027/0095
摘要： A method and apparatus for generating a reference signal for use in an alternating projection loop which is part of demodulation in a base station of a wireless communication system, the reference signal relaxed to minimize the effects of frequency offset and amplitude variations, the base station including an array of antennas. The alternating projection loop demodulates in the presence of co-channel interference and includes correction for time alignment and/or frequency offset.
摘要翻译：一种用于产生用于在无线通信系统的基站中作为解调的一部分的交替投影环路的参考信号的方法和装置，所述参考信号被放宽以最小化频偏和幅度变化的影响，所述基站包括天线阵列。在存在同信道干扰的情况下，交替投影环路解调并且包括用于时间对准和/或频率偏移的校正。

2. 发明授权

US6037898A Method and apparatus for calibrating radio frequency base stations using antenna arrays 失效
标题翻译：使用天线阵列校准射频基站的方法和装置
公开(公告)号：US6037898A
公开(公告)日：2000-03-14
申请号：US948772
申请日：1997-10-10
申请人： David M. Parish , Farhad Farzaneh , Craig H. Barratt
发明人： David M. Parish , Farhad Farzaneh , Craig H. Barratt
IPC分类号： H01Q3/26 , H04W24/00 , G01S13/00
CPC分类号： H04W24/00 , H01Q3/267
摘要： A method operating in a communications station for calibrating the communications station, the communications station including an antenna array of antenna elements, each having associated with it and included in a transmit apparatus chain and a receiver apparatus chain. The method comprises transmitting a prescribed signal from each antenna element using the transmit apparatus chain associated with the antenna element while receiving the transmitted signal in receiver apparatus chains not associated with the antenna. Calibration factors for each antenna element are determined as dependent on the associated transmit apparatus chain and receiver apparatus chain transfer functions using the prescribed signal and each of the signals received during transmissions. A communications station also is described which includes: an antenna array of a plurality of elements, each antenna element having associated with it and included in a transmit apparatus chain and a receiver apparatus chain; transmitting means configured to transmit a prescribed signal from each antenna element while receiving the transmitted signal in at least one receiver apparatus chain not associated with the transmitting antenna element; a memory coupled to the receiver apparatus chains for storing the signals received during the transmissions of the prescribed signals; and a signal processor coupled to the memory and configured to determine calibration factors for each antenna element, the calibration factors for a particular antenna element based on the transmit apparatus chain and receiver apparatus chain transfer functions of the transmit and receiver apparatus chains, respectively, that are associated with the particular antenna element.
摘要翻译：一种在通信站中操作的用于校准通信站的方法，所述通信站包括天线阵列天线阵列，每个天线阵列与天线阵列相关联并包括在发射设备链和接收机设备链中。该方法包括使用与天线元件相关联的发射装置链从每个天线元件发送规定的信号，同时在与天线不相关的接收机装置链中接收发射信号。每个天线元件的校准因子被确定为取决于相关联的发射设备链和接收机设备链传递函数，使用规定的信号和传输期间接收到的每个信号。还描述了一种通信站，其包括：多个元件的天线阵列，每个天线元件与其相关联并且被包括在发射设备链和接收机设备链中; 发送装置，被配置为在与所述发送天线元件不相关联的至少一个接收机设备链路中接收所发送的信号的同时从每个天线元件发送规定的信号; 耦合到所述接收机设备链的存储器，用于存储在所述规定信号的传输期间接收到的信号; 以及信号处理器，其耦合到所述存储器并且被配置为基于所述发射装置链和所述发射装置链的接收装置链传送功能，分别确定每个天线元件的校准因子，特定天线元件的校准因子，与特定天线元件相关联。

3. 发明授权

US06266528B1 Performance monitor for antenna arrays 有权
标题翻译：天线阵列性能监视器
公开(公告)号：US06266528B1
公开(公告)日：2001-07-24
申请号：US09219040
申请日：1998-12-23
申请人： Farhad Farzaneh
发明人： Farhad Farzaneh
IPC分类号： H04Q720
CPC分类号： H04W24/00 , H04B17/318
摘要： An antenna monitor collects statistics about the received signal strengths of each antenna in a cooperating antenna array over long periods of time. In cellular telephone base station applications for a base station using an array of antenna elements to obtain spatial diversity, samples of the received signal strength are taken during particular times whenever an active mobile subscriber is operating in the area. Periodically, such samples are averaged and added to a running total that is maintained in a long-term accumulator for each antenna. The accumulated totals are then compared after a statistically sufficient number of samples have been collected and averaged. Faulty antennas, including broken ones and ones with bad connections, will be revealed by those corresponding signal paths having relatively low accumulated totals. Given long enough collection periods, the spatial diversity of the antennas in the array will have only a minimal impact on favoring one antenna over another.
摘要翻译：天线监视器在长时间内收集关于协作天线阵列中每个天线的接收信号强度的统计。在使用天线元件阵列以获得空间分集的基站的蜂窝电话基站应用中，无论何时活动的移动用户在该区域中操作，在特定时间采集接收信号强度的采样。周期性地将这样的样本平均并加到每个天线的长期累加器中保持的运行总计。然后在收集统计学上足够数量的样本并进行平均后，比较累积总数。那些具有较差连接的故障天线，将由具有较低累积总数的相应信号路径显露出来。给定足够长的采集周期，阵列中的天线的空间分集将仅对有利于一个天线的影响最小。

4. 发明授权

US4986272A NMR imaging with variable repetition 失效
标题翻译：具有可变重复的NMR成像
公开(公告)号：US4986272A
公开(公告)日：1991-01-22
申请号：US391339
申请日：1989-08-09
申请人： Stephen J. Riederer , Farhad Farzaneh
发明人： Stephen J. Riederer , Farhad Farzaneh
IPC分类号： G01R33/561 , G01R33/58
CPC分类号： G01R33/583 , G01R33/561
摘要： An NMR system acquires data by performing a scan using a spin echo pulse sequence. An image is produced from the acquired data using a 2DFT reconstruction method. During the scan the echo time (TE) or the repetition time (TR) is altered as a function of phase encoding value to decrease total scan time or to improve signal-to-noise.
摘要翻译： NMR系统通过使用自旋回波脉冲序列执行扫描来获取数据。使用2DFT重建方法从所获取的数据产生图像。在扫描期间，回波时间（TE）或重复时间（TR）被改变为相位编码值的函数，以减少总扫描时间或改善信噪比。

5. 发明授权

US4717879A Pulse sequence for NMR image acquisition 失效
标题翻译：用于NMR图像采集的脉冲序列
公开(公告)号：US4717879A
公开(公告)日：1988-01-05
申请号：US859693
申请日：1986-05-05
申请人： Stephen J. Riederer , Farhad Farzaneh
发明人： Stephen J. Riederer , Farhad Farzaneh
IPC分类号： A61B5/055 , A61B10/00 , G01R33/48 , G01R33/54 , G01R33/20
CPC分类号： G01R33/4835
摘要： An improved method for obtaining a multi-slice acquisition in which images from several slices are simultaneously acquired at preselected repetition times. One scan allows for the acquiring of images from multiple slices, at multiple repetition times TR and multiple echo times TE in such a manner that all available readout time is utilized when both the first repetition time TR1 and the second repetition time TR2 are both appropriate combinations of defined measurement intervals.
摘要翻译：一种用于获得多片切片采集的改进方法，其中以预先选择的重复次数同时获取来自多个切片的图像。一次扫描允许以多个重复时间TR和多个回波时间TE从多个片段获取图像，使得当第一重复时间TR1和第二重复时间TR2都是适当的组合时利用所有可用的读出时间定义的测量间隔。

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