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。

公开(公告)号：US07158795B2

公开(公告)日：2007-01-02

申请号：US11006861

申请日：2004-12-08

申请人： Yan Zhang ,  Jingdong Lin ,  Yao Jingjing ,  Yuan Xu

发明人： Yan Zhang ,  Jingdong Lin ,  Yao Jingjing ,  Yuan Xu

IPC分类号： H04M1/00

CPC分类号： H04W52/0216 ,  H04W68/00 ,  Y02D70/1222

摘要： One of the common channels of the GSM system is the paging channel (PCH) for alerting the mobile station of an incoming call. The PCH message is scattered among four bursts as a result of coding, interleaving, and mapping processes before transmission. It is a waste of power for a handset to turn on and analyze all four bursts if the PCH message is a dummy one. Ideally, a handset needs to be able to make a determination whether a PCH message is a dummy one in as short of a time as possible and, if it is, turn off the power. Embodiments of this invention include methods and apparatus for enabling a handset to make this determination by merely analyzing the first received burst. Since most of the PCH messages are dummy ones, the proposed methods will cause noticeable savings in the power consumption of the GSM handsets.

摘要翻译： GSM系统的公共信道之一是用于向移动台报警来电的寻呼信道（PCH）。 作为传输之前的编码，交织和映射处理的结果，PCH消息分散在四个突发中。 如果PCH消息是虚拟的，手机打开并分析所有四个突发是浪费电力的。 理想情况下，手机需要能够在短时间内确定PCH消息是否为虚拟消息，如果是，则关闭电源。 本发明的实施例包括用于使手机能够仅通过分析第一接收到的突发来进行该确定的方法和装置。 由于大多数PCH消息是虚拟消息，因此所提出的方法将导致GSM手机的功耗显着降低。

公开(公告)号：US20060176964A1

公开(公告)日：2006-08-10

申请号：US11379329

申请日：2006-04-19

申请人： Jingdong Lin

发明人： Jingdong Lin

IPC分类号： H04B14/04

CPC分类号： H04L5/0007 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0091 ,  H04L27/3405 ,  H04L27/367

摘要： A channel optimization system for use with a communications channel and method of separating and encoding signals associated with the communications channel. In one embodiment, the channel optimization system includes an assorter that receives first and second signals having disparate transmission characteristics and selects one of the first and second signals. The channel optimization system also includes a translator, coupled to the assorter, that encodes the selected one of the first and second signals into a symbol representation as a function of a transmission characteristic associated therewith.

摘要翻译： 用于通信信道的信道优化系统和分离和编码与通信信道相关联的信号的方法。 在一个实施例中，信道优化系统包括接收具有不同传输特性的第一和第二信号并选择第一和第二信号之一的协调器。 信道优化系统还包括耦合到协调器的翻译器，其将所选择的第一和第二信号中的一个信号编码为与其相关联的传输特性的函数的符号表示。

公开(公告)号：US5724657A

公开(公告)日：1998-03-03

申请号：US537376

申请日：1995-09-29

申请人： Jingdong Lin ,  Ker Zhang

发明人： Jingdong Lin ,  Ker Zhang

IPC分类号： H04Q7/34 ,  H03H21/00 ,  H04Q7/38 ,  H04B17/00

CPC分类号： H03H21/0021

摘要： An adaptive frequency correction burst detector for GSM handset systems in a wireless communication system is disclosed. The detector uses a bandpass filter to filter the complex received samples to generate a first filtered output r(n). The first filtered output is then applied to a notch filter for the notch filter to adaptively generate a second filtered output y(n). An error calculation unit is used for calculating an error signal based on the difference between the second filtered output y(n) and a desired signal d(n), which is zero in the case of a notch filter. A notch filter coefficient updating unit is used for adaptively updating the notch filter using a least-mean-square algorithm. Then an error power is estimated based on the second filtered output y(n), while the signal power is estimated based on the first filtered output r(n). The power ratio between the two power estimates is compared to a predetermined threshold and if the ratio is below the threshold for a predetermined duration, then the system has detected the FCB signal.

摘要翻译： 公开了一种用于无线通信系统中的GSM手机系统的自适应频率校正突发检测器。 检测器使用带通滤波器对复数接收样本进行滤波，以产生第一滤波输出r（n）。 然后将第一滤波输出应用于陷波滤波器的陷波滤波器，以自适应地产生第二滤波输出y（n）。 误差计算单元用于基于第二滤波输出y（n）和期望信号d（n）之间的差计算误差信号，在陷波滤波器的情况下为零。 陷波滤波器系数更新单元用于使用最小均方算法自适应地更新陷波滤波器。 然后，基于第二滤波输出y（n）来估计误差功率，同时基于第一滤波输出r（n）来估计信号功率。 将两个功率估计之间的功率比与预定阈值进行比较，并且如果该比率低于预定持续时间的阈值，则系统已经检测到FCB信号。

公开(公告)号：US5533049A

公开(公告)日：1996-07-02

申请号：US280919

申请日：1994-07-27

申请人： Jingdong Lin

发明人： Jingdong Lin

IPC分类号： H04L25/02 ,  H04B1/38

CPC分类号： H04L25/022

摘要： The present invention provides a pre-emphasis selection method, digital signal processing module and digital communication system that use computations based on channel spectrum measurements for efficient, non-complex determination of a pre-emphasis filter index. By avoiding the complex computations, a near optimal selection of a pre-emphasis filter with robust performance is achieved with relatively simple calculations.

摘要翻译： 本发明提供了一种预加重选择方法，数字信号处理模块和数字通信系统，其使用基于信道频谱测量的计算来有效地，非复杂地确定预加重滤波器索引。 通过避免复杂的计算，通过相对简单的计算实现了具有鲁棒性能的预加重滤波器的近似最优选择。

公开(公告)号：US5528632A

公开(公告)日：1996-06-18

申请号：US282186

申请日：1994-07-28

申请人： Jingdong Lin

发明人： Jingdong Lin

IPC分类号： H04L27/233 ,  H04L27/22 ,  H04L27/06

CPC分类号： H04L27/2337

摘要： A simplified transition detector identifies phase reversal without relying upon complex correlation relationships or trellis techniques. Two correlation signals are obtained using tones with a phase difference of .pi./2. Zero-crossing information on the two correlation signals is used to detect phase reversal.

摘要翻译： 简化的转换检测器识别相位反转，而不依赖于复杂的相关关系或网格技术。 使用相位差为π/ 2的色调获得两个相关信号。 使用两个相关信号的过零信息来检测相位反转。