| 移动多媒体广播卫星同频网的频率同步方法 |
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| 引用本文： | 刘斌彬,陈文,葛启宏,陶涛.移动多媒体广播卫星同频网的频率同步方法[J].无线通信技术,2010,19(1). |
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| 作者姓名： | 刘斌彬 陈文 葛启宏 陶涛 |
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| 作者单位： | 国家广电总局广播科学研究院,北京泰关世纪科技有限公司,北京,100097 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 本文提出了一种用于中国移动多媒体广播(CMMB)卫星单频网的频率同步方法.该方法利用信标中同步序列的时域相关进行初始频偏估计,利用OFDM符号中连续导频的频域相关进行频偏跟踪.通过闭环的方式控制卫星下行信号的频率,将所有信号的频率锁定到基准频率上,从而保证了全网的频率同步.实验结果表明,该方法具有较高的精度和稳定性,可以很好的满足系统的需求.
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| 关 键 词： | 移动多媒体广播 频率偏差 同步序列 连续导频 |
Frequency Synchronization in Satellite Single Frequency Network of China Mobile Multimedia Broadcasting System |
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| LIU Bin-bin,CHEN Wen,GE Qi-hong,TAO Tao.Frequency Synchronization in Satellite Single Frequency Network of China Mobile Multimedia Broadcasting System[J].Wireless Communication Technology,2010,19(1). |
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| Authors: | LIU Bin-bin CHEN Wen GE Qi-hong TAO Tao |
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| Affiliation: | LIU Bin-bin,CHEN Wen,GE Qi-hong,TAO Tao(TiMi Technologies,Academy of Broadcasting Science,SARFT,Beijing 100097,China) |
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| Abstract: | This paper present a frequency synchronization method for satellite single frequency network of CMMB(China Mobile Multimedia Broadcasting) system.It uses the time-domain correlation of synchronization sequences to estimate the initial frequency offset,and uses the frequency-domain correlation of continuous pilots to track the residual frequency offset.The frequency of satellite downlink signal is locked to the reference frequency by closed-loop control,thus the frequency synchronization of network is realiz... |
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| Keywords: | mobile multimedia broadcasting frequency offset synchronization sequence continuous pilot |
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