| 多相滤波时钟同步系统的设计与性能分析 |
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| 引用本文： | 樊孝明,林基明,陈宏滨.多相滤波时钟同步系统的设计与性能分析[J].系统工程理论与实践,2012,32(10):2270-2275. |
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| 作者姓名： | 樊孝明 林基明 陈宏滨 |
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| 作者单位： | 桂林电子科技大学 信息与通信学院, 桂林 541004 |
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| 基金项目： | 广西区自然基金(桂科自0640168,桂科自0991018Z);信息与通信技术广西重点实验室基金资助 |
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| 摘 要： | 高精度、高速率的时钟同步技术是现代数字通信系统实现的关键之一. 以QPSK基带通信系统为例, 提出了多相滤波的最大似然定时误差检测时钟同步方法, 详细分析了其工作原理与设计过程, 并用MATLAB进行了性能仿真. 结果表明, 在误码率接近105时, 该方法与无定时偏差的相干解调相比, Eb/N0要求相 差不到0.5dB, 具有比较理想的性能, 而且计算量较小, 容易用现代DSP或FPGA予以实现.
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| 关 键 词： | 定时恢复 多相匹配滤波 最大似然误差估计 同步 |
| 收稿时间： | 2010-07-06 |
Design and performance analysis of clock synchronization system based on polyphase filter |
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| FAN Xiao-ming,LIN Ji-ming,CHEN Hong-bin.Design and performance analysis of clock synchronization system based on polyphase filter[J].Systems Engineering —Theory & Practice,2012,32(10):2270-2275. |
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| Authors: | FAN Xiao-ming LIN Ji-ming CHEN Hong-bin |
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| Institution: | School of Information & Communication, Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | High-precision,high-speed clock synchronization is one of the key technologies for modern digital communication systems.Taking QPSK baseband communication system as an example,a clock synchronization method based on maximum likelihood synchronization error detection and polyphase filter is proposed.The operation principles and design procedures are analyzed in detail.Moreover,its performance is simulated by using Matlab.The results show that the requirement of Eb/NO of the proposed method is less than 0.5dB higher compared with coherent demodulation with ideal timing at the BER close to 10-5.Its performance is satisfactory,with less computation,and easy to realize by modern DSP or FPGA technologies. |
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| Keywords: | timing recovery polyphase matched filter maximum likelihood error estimation synchronization |
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