基于椭圆球面波的非正弦通信系统同步方法

Synchronization method of nonsinusoidal communication systems based on prolate spheroidal wave functions

针对基于椭圆球面波的非正弦通信系统同步困难问题,提出了基于训练序列和导频信号的同步方法。该同步方法在发信端利用训练序列调制椭圆球面波脉冲信号作为同步头,并在调制信号中加入导频信号;在收信端利用导频信号,通过锁相环技术使本地采样时钟与发信端采样时钟同步,本地模板信号与接收的调制信号滑动相关,通过检测最大相关值,获取同步信号。理论分析和仿真结果表明:在加性高斯白噪声信道中,该方法在低信噪比的情况下,仍能获得良好的同步性能。

For the synchronization in nonsinusoidal communication systems which is based on prolate spheroidal wave functions, a synchronization method based on training sequence and pilot signal is proposed. At the transmitter, the prolate spheroidal wave pulse signals which are modulated by training sequence are adopted as synchronous head, and pilot signal is added to modulated signal as well. At the receiver, sampling clock synchronization is achieved by using the pilot signal and phase-locked loop technology. Local template signal is correlative with the sliding of the received modulated signal and synchronization signal is captured by detecting maximum correlation value. Theoretical analysis and simulation results show that the method has a good synchronization performance at low signal-to-noise ratios in the additive Gaussian white noise（AGWN） channel.