| GSM系统频率同步的实现 |
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| 引用本文： | 王永学. GSM系统频率同步的实现[J]. 电讯技术, 2010, 50(6). DOI: 10.3969/j.issn.1001-893x.2010.06.008 |
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| 作者姓名： | 王永学 |
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| 作者单位： | 深圳职业技术学院,电信学院,广东,深圳,518055 |
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| 基金项目： | 深圳市科技局支持项目 |
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| 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.
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| 关 键 词： | 频率同步 频率校正信道 频偏估计 |
Realization of Frequency Synchronization for GSM System |
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| WANG Yong-xue. Realization of Frequency Synchronization for GSM System[J]. Telecommunication Engineering, 2010, 50(6). DOI: 10.3969/j.issn.1001-893x.2010.06.008 |
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| Authors: | WANG Yong-xue |
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| Affiliation: | College of Electronic and Communication,Shenzhen Polytechnic,Shenzhen 510855,China |
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| Abstract: | 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. |
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| Keywords: | GSM |
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