一种稳健的AUV水声跳频通信系统同步检测方法

A Robust Synchronous Detection Method for AUV Underwater Acoustic FH Communication System

可靠的同步检测技术是AUV水声通信系统稳定工作的前提,针对非平稳噪声环境下,传统拷贝相关检测器虚警率高,稳定性差的问题,该文给出了一种稳健的同步检测方法,该方法利用分数阶傅立叶变换和拷贝相关器构造联合检测器,实现LFM信号的多参数联合判决。仿真结果表明,基于该方法的AUV水声通信同步系统,在非平稳噪声环境下,具备更好的抗干扰性能,同步检测概率显著提高。

The reliable synchronization detection technology is the precondition for the stable work of AUV underwater acoustic communication system.In view of the high false alarm rate and poor stability of traditional MF detector in non-stationary noise environment,in this papera robust synchronization detection method is presented.The method uses FRFT and MF to construct a joint detector.The multi parameter joint decision of the LFM signal is presented.The simulation results show that the AUV underwater acoustic communication synchronization system based on this method has better anti-jamming performance in the non-stationary noise environment,and the synchronous detection probability is greatly improved.