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公开(公告)号：US07251300B2
公开(公告)日：2007-07-31
申请号：US10744049
申请日：2003-12-22
申请人： Jiayi Zhuang , Jingdong Lin , Yueheng Sun
发明人： Jiayi Zhuang , Jingdong Lin , Yueheng Sun
IPC分类号： H04L27/06
CPC分类号： H04L5/06 , H04L5/22 , H04L5/26 , H04L2027/0065
摘要： A method of frequency tracking based on recovered data, for use in an automatic frequency control subsystem at the receiver of a mobile station, is disclosed. The frequency tracking mechanism derives frequency error information from the recovered data to determine the adjustment needed at the mobile station's local voltage controlled oscillator in order to track the frequency of the base station.
摘要翻译： 公开了一种基于恢复数据的频率跟踪方法，用于移动台接收机处的自动频率控制子系统。 频率跟踪机制从恢复的数据导出频率误差信息，以确定移动台的局部压控振荡器所需的调整，以便跟踪基站的频率。
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公开(公告)号：US20050135512A1
公开(公告)日：2005-06-23
申请号：US10744049
申请日：2003-12-22
申请人： Jiayi Zhuang , Jingdong Lin , Yueheng Sun
发明人： Jiayi Zhuang , Jingdong Lin , Yueheng Sun
CPC分类号： H04L5/06 , H04L5/22 , H04L5/26 , H04L2027/0065
摘要： A method of frequency tracking based on recovered data, for use in an automatic frequency control subsystem at the receiver of a mobile station, is disclosed. The frequency tracking mechanism derives frequency error information from the recovered data to determine the adjustment needed at the mobile station's local voltage controlled oscillator in order to track the frequency of the base station.
摘要翻译： 公开了一种基于恢复数据的频率跟踪方法，用于移动台接收机处的自动频率控制子系统。 频率跟踪机制从恢复的数据导出频率误差信息，以确定移动台的局部压控振荡器所需的调整，以便跟踪基站的频率。
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3.发明授权Maximum ratio combining of channel estimation for joint detection in TD-SCDMA systems 有权TD-SCDMA系统联合检测信道估计的最大比组合公开(公告)号：US07343155B2
公开(公告)日：2008-03-11
申请号：US10966955
申请日：2004-10-15
申请人： Jian Cheng , Jiayi Zhuang
发明人： Jian Cheng , Jiayi Zhuang
IPC分类号： H04Q7/20
CPC分类号： H04J13/00 , H04B1/7105
摘要： The embodiments of the present invention relate to the general area of wireless communication systems and, in particular, to channel estimation for joint detection of data signals in TD-SCDMA systems. While time slots and spreading codes separate the users in a TD-SCDMA system, multiple access interference affects all its users. To deal with this problem detection schemes such as joint detection are used, which process all users' signals in parallel and include the interference information from all the users. An important part of the joint detection process is channel estimation and, as such, affects the detection process in different ways. In general, the more accurate the channel estimation is, the better the system performance will be. This invention presents methods and systems for channel estimation of TD-SCDMA systems.
摘要翻译： 本发明的实施例涉及无线通信系统的一般领域，特别涉及TD-SCDMA系统中数据信号联合检测的信道估计。 虽然时隙和扩展码分离了TD-SCDMA系统中的用户，但多址接入干扰会影响其所有用户。 为了解决这个问题，使用诸如联合检测的检测方案，其并行处理所有用户的信号并且包括来自所有用户的干扰信息。 联合检测过程的一个重要部分是信道估计，因此以不同的方式影响检测过程。 一般来说，信道估计越精确，系统性能就越好。 本发明提出了用于TD-SCDMA系统信道估计的方法和系统。
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4.发明申请Method and apparatus for frequency estimation using iterative filtering in a GSM communications system 有权在GSM通信系统中使用迭代滤波的频率估计方法和装置公开(公告)号：US20050113033A1
公开(公告)日：2005-05-26
申请号：US10721060
申请日：2003-11-24
申请人： Jingdong Lin , Jiayi Zhuang , Yueheng Sun , Fei Xie
发明人： Jingdong Lin , Jiayi Zhuang , Yueheng Sun , Fei Xie
CPC分类号： H04L27/22 , H04L2027/0024 , H04L2027/0065
摘要： A method of frequency estimation for a GSM communications system is disclosed. First, the a frequency control channel data burst is received and downsampled into a plurality of subsets. Then, the subsets are filtered using an auto-regressive filter. The filtered subsets are then correlated and summed to determine a parameter r. The estimated frequency is calculated based upon the parameter r.
摘要翻译： 公开了一种GSM通信系统的频率估计方法。 首先，频率控制信道数据脉冲串被接收并下采样成多个子集。 然后，使用自回归滤波器对子集进行过滤。 然后将经滤波的子集相关并相加以确定参数r。 基于参数r计算估计频率。
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5.发明申请Method and apparatus for silent frame detection in a GSM communications system 有权GSM通信系统中静音帧检测的方法和装置公开(公告)号：US20050090293A1
公开(公告)日：2005-04-28
申请号：US10696397
申请日：2003-10-28
申请人： Jingdong Lin , Yan Zhang , Jiayi Zhuang , Jian Cheng
发明人： Jingdong Lin , Yan Zhang , Jiayi Zhuang , Jian Cheng
CPC分类号： H04B17/336
摘要： A method of detecting a silent frame at a mobile station in a GSM transmission is disclosed. The method comprises first receiving a data burst intended for the mobile station. Then, a signal-to-interference-and-noise ratio (SINR) is determined for the data burst. If the SINR is below a predetermined threshold, then the data burst is determined as from a silent frame.
摘要翻译： 公开了一种在GSM传输中检测移动台上的无声帧的方法。 该方法包括首先接收针对移动台的数据突发。 然后，确定数据脉冲串的信号与干扰噪声比（SINR）。 如果SINR低于预定阈值，则从无声帧确定数据脉冲串。
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6.发明授权Method and apparatus for frequency estimation using iterative filtering in a GSM communications system 有权在GSM通信系统中使用迭代滤波的频率估计方法和装置公开(公告)号：US07171162B2
公开(公告)日：2007-01-30
申请号：US10721060
申请日：2003-11-24
申请人： Jingdong Lin , Jiayi Zhuang , Yueheng Sun , Fei Xie
发明人： Jingdong Lin , Jiayi Zhuang , Yueheng Sun , Fei Xie
IPC分类号： H04B17/00
CPC分类号： H04L27/22 , H04L2027/0024 , H04L2027/0065
摘要： A method of frequency estimation for a GSM communications system is disclosed. First, the a frequency control channel data burst is received and downsampled into a plurality of subsets. Then, the subsets are filtered using an auto-regressive filter. The filtered subsets are then correlated and summed to determine a parameter r. The estimated frequency is calculated based upon the parameter r.
摘要翻译： 公开了一种GSM通信系统的频率估计方法。 首先，频率控制信道数据脉冲串被接收并下采样成多个子集。 然后，使用自回归滤波器对子集进行过滤。 然后将经滤波的子集相关并相加以确定参数r。 基于参数r计算估计频率。
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7.发明申请Method and system for modifying branch metric of Viterbi decoder for uncorrelated signals 审中-公开用于修改维特比解码器用于不相关信号的分支度量的方法和系统公开(公告)号：US20050141651A1
公开(公告)日：2005-06-30
申请号：US10867273
申请日：2004-06-14
申请人： Jiayi Zhuang , Shengguan Hu , Jingdong Lin , Datong Chen
发明人： Jiayi Zhuang , Shengguan Hu , Jingdong Lin , Datong Chen
CPC分类号： H04L1/0071 , H04L1/0054 , H04L25/0202 , H04L25/067
摘要： The present disclosure provides simple methods and systems for generating modified branch metrics for the Viterbi decoder so that the decoder can decode the uncorrelated incoming signals without the influence of either the signal power level or the noise variance. The proposed branch metrics noticeably improve the performance of the Viterbi algorithm in such cases. The present disclosure also provides methods and systems for reducing the length of the demodulated symbols for efficient computation. In an exemplary method, it is shown that the only requirement of the proposed modified branch metric, in addition to the traditional branch metric requirements, is the computation of the noise energy. In another exemplary system, an arrangement of circuit modules offers an implementation of one of the embodiments of the proposed method.
摘要翻译： 本公开提供了用于生成用于维特比解码器的修改的分支度量的简单方法和系统，使得解码器可以在不受信号功率电平或噪声方差的影响的情况下解码不相关的输入信号。 在这种情况下，所提出的分支度量显着提高了维特比算法的性能。 本公开还提供了用于减少用于有效计算的解调符号的长度的方法和系统。 在示例性方法中，示出了除了传统的分支度量要求之外，所提出的修改的分支度量的唯一要求是噪声能量的计算。 在另一示例性系统中，电路模块的布置提供了所提出的方法的实施例之一的实现。
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8.发明授权Method and apparatus for silent frame detection in a GSM communications system 有权GSM通信系统中静音帧检测的方法和装置公开(公告)号：US07245878B2
公开(公告)日：2007-07-17
申请号：US10696397
申请日：2003-10-28
申请人： Jingdong Lin , Yan Zhang , Jiayi Zhuang , Jian Cheng
发明人： Jingdong Lin , Yan Zhang , Jiayi Zhuang , Jian Cheng
CPC分类号： H04B17/336
摘要： A method of detecting a silent frame at a mobile station in a GSM transmission is disclosed. The method comprises first receiving a data burst intended for the mobile station. Then, a signal-to-interference-and-noise ratio (SINR) is determined for the data burst. If the SINR is below a predetermined threshold, then the data burst is determined as from a silent frame.
摘要翻译： 公开了一种在GSM传输中检测移动台上的无声帧的方法。 该方法包括首先接收针对移动台的数据突发。 然后，确定数据脉冲串的信号与干扰噪声比（SINR）。 如果SINR低于预定阈值，则从无声帧确定数据脉冲串。
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9.发明申请Maximum ratio combining of channel estimation for joint detection in TD-SCDMA systems 有权TD-SCDMA系统联合检测信道估计的最大比组合公开(公告)号：US20060084425A1
公开(公告)日：2006-04-20
申请号：US10966955
申请日：2004-10-15
申请人： Jian Cheng , Jiayi Zhuang
发明人： Jian Cheng , Jiayi Zhuang
IPC分类号： H04Q7/20
CPC分类号： H04J13/00 , H04B1/7105
摘要： The embodiments of the present invention relate to the general area of wireless communication systems and, in particular, to channel estimation for joint detection of data signals in TD-SCDMA systems. While time slots and spreading codes separate the users in a TD-SCDMA system, multiple access interference affects all its users. To deal with this problem detection schemes such as joint detection are used, which process all users' signals in parallel and include the interference information from all the users. An important part of the joint detection process is channel estimation and, as such, affects the detection process in different ways. In general, the more accurate the channel estimation is, the better the system performance will be. This invention presents methods and systems for channel estimation of TD-SCDMA systems.
摘要翻译： 本发明的实施例涉及无线通信系统的一般领域，特别涉及TD-SCDMA系统中数据信号联合检测的信道估计。 虽然时隙和扩展码分离了TD-SCDMA系统中的用户，但多址接入干扰会影响其所有用户。 为了解决这个问题，使用诸如联合检测的检测方案，其并行处理所有用户的信号并且包括来自所有用户的干扰信息。 联合检测过程的一个重要部分是信道估计，因此以不同的方式影响检测过程。 一般来说，信道估计越精确，系统性能就越好。 本发明提出了用于TD-SCDMA系统信道估计的方法和系统。
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