计算机工程Issue(3)：123-126,131,5.DOI:10.3969/j.issn.1000-3428.2014.03.025
一种适合突发通信的CPM定时恢复算法
A CPM Timing Recovery Algorithm Applicable to Burst Communication
摘要
Abstract
A data aided and decision-directed union timing recovery method for the synchronization problem of Continuous Phase Modulation(CPM) is presented. Based on Pulse Amplitude Modulation(PAM) representation of CPM signals, Timing Error Detector(TED) and sequence detector are got from the method of likelihood function. And a Phase Lock Loop(PLL) that is used for timing error estimation is constructed in the system, timing acquisition is achieved by using the data aided and data reuse method, by using decision-direct method to track the timing error. Simulation experimental results show that the algorithm can overcome the problem of unlock that existed in decision-directed method when the timing error is large, and achieve timing recovery in a wide range of timing error. And it reduces the number of match filter which is used in timing estimation and detection. For the CPM burst signal in DVB-RCS2 standard, it can achieve good timing estimation by using three match filters. The algorithm has good timing estimation performance and robustness .关键词
连续陒位调制/定时恢复/数据辅助/直接判决/定时误差检测器/锁陒环Key words
Continuous Phase Modulation(CPM)/timing recovery/data aided/decision-directed/Timing Error Detector(TED)/Phase Lock Loop(PLL)分类
信息技术与安全科学引用本文复制引用
王勇军,彭华..一种适合突发通信的CPM定时恢复算法[J].计算机工程,2014,(3):123-126,131,5.基金项目
国家自然科学基金资助项目(61072046)；河南省基础与前沿技术研究计划基金资助项目(102300410008)。 （61072046）
