quotation:		[Copy]
		[Copy]

This Paper:Browse 3307 Download 3190
GSM系统频率同步的实现
王永学
0 Fontlarge +\|Default\|Small
(深圳职业技术学院电信学院，广东深圳 518055)

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8 dB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。

关键词: GSM 频率同步频率校正信道频偏估计

DOI：

基金项目:深圳市科技局支持项目（07KJcb137）

Realization of Frequency Synchronization for GSM System

WANG Yong-xue

(College of Electronic and Communication,Shenzhen Polytechnic,Shenzhen 510855,Ch ina)

Abstract:

A simple frequency synchronization algorithm is proposed for GSM syst em. It estimates the frequency deviation from the received signal according to t he signal feature of the frequency correction channel(FCCH), and realizes the sy stem f requency synchronization by frequency compensation. Simulation results show that the algorithm has low lost frame rate and can detect all FCCH frames when signa l -to-noise ratio(SNR) is only 8dB and it has good performance in frequency deviat ion esti mation and compensation, the BitErrorRate(BER) of the system is decreased. C ompared with the traditional frequencybased FCCH detection algorithm and MLM atching 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.

Key words: GSM frequency synchronization frequency correction channel(FCCH) frequ ency deviation estimation