基于小波变换的PN序列周期估计

Period estimation of PN sequence based on wavelet transform

针对通信对抗的实际应用,提出一种基于小波变换的PN码序列周期估计的新方法。提出采用最小尺度为8倍chip宽度的不同尺度下的小波变换幅值序列提取PN码序列各周期的边沿跳变信息,并叠加各尺度下小波变换幅值序列的幅度谱,通过检测叠加谱的谱线间隔来实现PN码序列的周期估计。仿真实验表明,该算法不要求较长的数据长度,估计性能优越且稳定可靠,具有很强的鲁棒性和可行性。

Aiming at the application of communication countermeasures,a novel method is proposed for period estimation of the PN sequence based on the wavelet transform.The wavelet transform（WT） among various scales（≥eightfold chip duration） is utilized to abstract period edge information of the PN sequence.And the WT＇s amplitude spectra is accumulated among some scales to implement the the period estimation of the PN sequence through detecting the spectral line interval.Simulation result indicates that this algorithm has a good estimation performance,dose not require large data length and is well reliable and feasible.