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1.发明授权Burst format and associated signal processing to improve frequency and timing estimation for random access channels 失效突发格式和相关信号处理，以改善随机接入信道的频率和时序估计公开(公告)号：US06373858B1
公开(公告)日：2002-04-16
申请号：US09110035
申请日：1998-07-02
申请人： Mohammad Soleimani , A. Roger Hammons, Jr. , Zheng-Liang Shi , Yash Vasavada , Moe Rahnema , Yezdi Antia
发明人： Mohammad Soleimani , A. Roger Hammons, Jr. , Zheng-Liang Shi , Yash Vasavada , Moe Rahnema , Yezdi Antia
IPC分类号： H04J300
CPC分类号： H04L7/042 , H04L2007/047
摘要： A message format and associated method for estimating the frequency and timing offset of a reference burst of a random access channel in a time-division multiple access communications system. A signal structure in which the continuous wave segment is split into two parts separated by some portion of the content of the random access channel burst is used to provide more precise frequency estimation. Iteration of separate frequency and timing estimation procedures is used to refine both estimates, as the individual estimation processes are more accurate when there is less error in the other parameter. Multiple hypothesis testing is used, in which more than one initial frequency estimate is carried through the iteration process, with thresholding to identify the best frequency offset. Reliable rejection of false ambiguities is achieved because the degradation in timing estimation, due to large frequency offsets, can be detected with thresholding.
摘要翻译： 一种用于估计时分多址通信系统中的随机接入信道的参考突发的频率和定时偏移的消息格式和相关联的方法。 使用连续波段被分割成由随机接入信道突发的内容的一部分分开的两部分的信号结构来提供更精确的频率估计。 单独的频率和时间估计过程的迭代用于改进两个估计，因为当另一个参数中的误差较小时，各个估计过程更准确。 使用多重假设检验，其中通过迭代过程承载多于一个初始频率估计，并通过阈值来识别最佳频率偏移。 由于可以通过阈值来检测由于大的频率偏移导致的定时估计的劣化，所以可以得到可靠的误差模糊的拒绝。
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2.发明授权公开(公告)号：US10826596B2
公开(公告)日：2020-11-03
申请号：US15902784
申请日：2018-02-22
摘要： A system and method for estimating calibration parameters and locating a Calibration Earth Station (CES) is described. The method may be performed offline. The method includes: providing L×M pilot signal measurements in a matrix R from L CESs and the M feed elements, wherein the matrix R comprises a set of channel coefficients c={c1, c2, . . . , cM}, and k={k1, k2, . . . , kL} perturbations; linking a subset of channel coefficients {c1, c2, . . . , cM} using each of the L CESs; and estimating a relative estimate of the k={k1, k2, . . . , kL} pertubations across the L CESs by using each of the L CESs as a bridging element. In the method, the bridging element provides a strong pilot signal for at least two of the L CESs. A set of criteria for determining locations of CESs have been described. A set of desirable properties for the solution set of L CESs have been disclosed. A combination of inner loop and outer loop methods for determining the final set of optimal locations have been described.
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公开(公告)号：US09099776B2
公开(公告)日：2015-08-04
申请号：US13403532
申请日：2012-02-23
申请人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
发明人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
CPC分类号： H01Q3/267
摘要： A method for iterative estimation of a set of unknown channel parameters in a beamforming network including determining a first order estimate of offsets at measurement nodes and an estimate of the confidence in the initial estimate of the measurement nodes' offsets, and iterating, until a desired estimation accuracy is obtained, determining an improved estimate of a parameter set, and the confidence in the estimates, using the prior estimate of the offsets at the measurement nodes and determining an improved estimate of the offsets at the measurement nodes and the associated confidence values using the prior estimate of the parameter set and the corresponding confidence values.
摘要翻译： 一种用于迭代估计波束形成网络中的一组未知信道参数的方法，包括确定测量节点处的偏移量的一阶估计，以及对测量节点偏移的初始估计中的置信度的估计，并且迭代，直到所需的 使用在测量节点处的偏移的先前估计来确定参数集合的改进的估计和估计的置信度并且使用以下方法确定测量节点处的偏移的改进的估计和相关联的置信度值： 参数集的先前估计和相应的置信度值。
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公开(公告)号：US08963772B2
公开(公告)日：2015-02-24
申请号：US13326209
申请日：2011-12-14
申请人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
发明人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
CPC分类号： G01S19/05 , G01S19/258 , G01S19/27 , G01S19/33
摘要： An approach provides for conversion of global positioning system (GPS) data. A user terminal receives positioning data from a base station, wherein the positioning data is received in a second format, and wherein the second format was derived from ephemeris data broadcast via a global positioning system (GPS) in a first format. The user terminal converts the positioning data from the second format into a third format that is compatible with a protocol of the GPS system, and determines a first fix using the third format of the positioning data.
摘要翻译： 一种方法提供了全球定位系统（GPS）数据的转换。 用户终端从基站接收定位数据，其中以第二格式接收定位数据，并且其中第二格式是通过第一格式的全球定位系统（GPS）从星历数据广播导出的。 用户终端将来自第二格式的定位数据转换为与GPS系统的协议兼容的第三格式，并且使用定位数据的第三格式确定第一固定。
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公开(公告)号：US20120146849A1
公开(公告)日：2012-06-14
申请号：US13326209
申请日：2011-12-14
申请人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
发明人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
CPC分类号： G01S19/05 , G01S19/258 , G01S19/27 , G01S19/33
摘要： An approach provides for conversion of global positioning system (GPS) data. A user terminal receives positioning data from a base station, wherein the positioning data is received in a second format, and wherein the second format was derived from ephemeris data broadcast via a global positioning system (GPS) in a first format. The user terminal converts the positioning data from the second format into a third format that is compatible with a protocol of the GPS system, and determines a first fix using the third format of the positioning data.
摘要翻译： 一种方法提供了全球定位系统（GPS）数据的转换。 用户终端从基站接收定位数据，其中以第二格式接收定位数据，并且其中第二格式是通过第一格式的全球定位系统（GPS）从星历数据广播导出的。 用户终端将来自第二格式的定位数据转换为与GPS系统的协议兼容的第三格式，并且使用定位数据的第三格式确定第一固定。
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公开(公告)号：US20130044024A2
公开(公告)日：2013-02-21
申请号：US13403532
申请日：2012-02-23
申请人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John Corrigan, III
发明人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John Corrigan, III
CPC分类号： H01Q3/267
摘要： A method for iterative estimation of a set of unknown channel parameters in a beamforming network including determining a first order estimate of offsets at measurement nodes and an estimate of the confidence in the initial estimate of the measurement nodes' offsets, and iterating, until a desired estimation accuracy is obtained, determining an improved estimate of a parameter set, and the confidence in the estimates, using the prior estimate of the offsets at the measurement nodes and determining an improved estimate of the offsets at the measurement nodes and the associated confidence values using the prior estimate of the parameter set and the corresponding confidence values.
摘要翻译： 一种用于迭代估计波束形成网络中的一组未知信道参数的方法，包括确定测量节点处的偏移量的一阶估计，以及对测量节点偏移的初始估计中的置信度的估计，并且迭代，直到所需的 使用在测量节点处的偏移的先前估计来确定参数集合的改进的估计和估计的置信度并且使用以下方法确定测量节点处的偏移的改进的估计和相关联的置信度值： 参数集的先前估计和相应的置信度值。
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公开(公告)号：US20120218141A1
公开(公告)日：2012-08-30
申请号：US13403532
申请日：2012-02-23
申请人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
发明人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
CPC分类号： H01Q3/267
摘要： A method for iterative estimation of a set of unknown channel parameters in a beamforming network including determining a first order estimate of offsets at measurement nodes and an estimate of the confidence in the initial estimate of the measurement nodes' offsets, and iterating, until a desired estimation accuracy is obtained, determining an improved estimate of a parameter set, and the confidence in the estimates, using the prior estimate of the offsets at the measurement nodes and determining an improved estimate of the offsets at the measurement nodes and the associated confidence values using the prior estimate of the parameter set and the corresponding confidence values.
摘要翻译： 一种用于迭代估计波束形成网络中的一组未知信道参数的方法，包括确定测量节点处的偏移量的一阶估计，以及对测量节点偏移的初始估计中的置信度的估计，并且迭代，直到所需的 使用在测量节点处的偏移的先前估计来确定参数集合的改进的估计和估计的置信度并且使用以下方法确定测量节点处的偏移的改进的估计和相关联的置信度值： 参数集的先前估计和相应的置信度值。
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