CPM系统中的自适应检测图同步算法

摘要

For the continuous phase modulation system has the drawback of a high complexity of synchronization algorithm,large amount of data,high complexity of decision threshold and long delay,an improve algorithm of the adaptive threshold detection is introduced and a fast synchronization algorithm (FSA) is proposed. Its core idea is to calculate the received signal and the local synchronize codeword by a detecting diagram algorithm and simplified decision process,and determine the synchronization performance quickly. A fast synchronization system is obtained by putting the algorithm to the CPM system. Theoretical analysis and simulation results show that the FSA algorithm can reduce the computational complexity and the amount of communication data compared with the traditional synchronization methods,simplify the determine process and improve the system performance.%针对连续相位调制系统中同步算法复杂度较高、数据量大、判决门限复杂、延时长等缺点,对自适应门限相关检测算法进行改进,提出了一种检测图同步算法(Fast Synchronization Algorithm,FSA),其核心思想是将接收信号与本地同步码字进行检测运算,通过检测图以及简化的判决过程,达到快速判断同步性能的目的.将该算法应用于CPM调制方式,建立一种快速同步系统.理论分析和仿真结果表明,与传统同步方式相比较,FSA算法复杂度和通信数据量大大减少,判决难度降低,系统性能有所提高.