非正弦时域正交调制信号的抗定时抖动接收方法

在非正弦时域正交调制通信系统中，调制信号对定时抖动较敏感，定时抖动可使解调性能显著下降.针对该问题，提出了一种抗定时抖动接收方法.该方法从非正弦时域正交调制信号与低通信号的等效性出发，根据接收信号与等效的正余弦载波的相关运算结果来求取各路脉冲调制信号的定时抖动大小，以实时修正相关接收机中的各模板信号相位，从而消除定时抖动对解调性能的影响.仿真分析结果表明，定时抖动误差控制在1%×Ts内，即可消除对解调性能的影响.该方法既克服了已有方法的应用局限性，又保持了相关接收机的最佳输出信噪比特性.

Receiving method of anti timing jitter for nonsinusoidal orthogonal modulation signal in time domain

The modulated signal is very sensitive to timing jitter in nonsinusoidal orthogonal modulation communication system.Timing jitter can degrate demodulation performance greatly.A novel antitimingjitter receiving method is proposed for the issue.Based on equivalent lowpass signal of nonsinusoidal orthogonal modulation signal，timing jitter can be calculated from correlation result between each modulated signal and sinusoidal or cossinusoidal siganl.The phase of template signal can be amended timely so as to remove the timing jitter effect on system performance.Simulation result shows that the timing jitter has no effect on the demodulation performance when it is controlled in 1%×Ts.This method not only overcomes the known methods limitation but also keeps the optimum output signalnoiseratio.