GSM系统频率同步的实现  

Realization of Frequency Synchronization for GSM System

作　　者：王永学[1] 

机构地区：[1]深圳职业技术学院电信学院,广东深圳518055

出　　处：《电讯技术》2010年第6期37-40,共4页Telecommunication Engineering

基　　金：深圳市科技局支持项目(07KJcb137)~~

摘　　要：在GSM系统中提出一种简单的频率同步算法,利用系统频率校正信道(FCCH)的信号特征估计接收信号的频率偏移,并通过频率补偿实现系统频率同步。仿真结果表明,该算法丢包率低,信噪比为8dB时就可完全检测到FCCH;频偏估计和补偿效果好,降低了系统误码率。与传统的基于频域FCCH检测算法和最大似然匹配检测算法相比,所提算法基于时域信号处理,不需进行频域分析,其性能好且简单实用。A simple frequency synchronization algorithm is proposed for GSM system. It estimates the frequency deviation from the received signal according to the signal feature of the frequency correction channel（FCCH）, and realizes the system frequency synchronization by frequency compensation. Simulation results show that the algorithm has low lost frame rate and can detect all FCCH frames when signal- to- noise ratio（SNR） is only 8dB and it has good performance in frequency deviation estimation and compensation, the Bit-Error-Rate（BER） of the system is decreased. Compared with the traditional frequency-based FCCH detection algorithm and ML- Matching algorithm, the proposed algorithm is based on time domain signal processing and need no frequency domain analysis, so it is simple and has good performance.

关 键 词：GSM 频率同步 频率校正信道 频偏估计 

分 类 号：TN929.5[电子电信—通信与信息系统]