四维直接序列扩频调制技术识别方法

针对不同扩频调制技术之间无法互通的问题,结合不同的时频分析工具,从调制信号特征参量角度出发,提出可有效区分新旧扩频调制技术的识别方法,从而达到两种不同扩频调制通信系统之间互通互联的效果。理论分析与仿真结果表明,两种扩频调制信号的时频特征区分度较小,但高阶累积量特征具备明显的区分度,考虑到处理的实时性,利用四阶累积量可以有效解决新旧扩频调制体制的识别问题。

Identification Method of Four Dimensional Direct Sequence Spread Spectrum Modulation Technology

To solve the problem that different spread spectrum modulation technologies can not communicate with each other,combined with different time-frequency analysis tools and from the perspective of modulation signal characteristic parameters,the paper proposed a recognition method that can effectively distinguish the old and new spread spectrum modulation technologies,so as to achieve the effect of interconnection between two different spread spectrum modulation communication systems.Theoretical analysis and simulation results show that time-frequency characteristics of the two kinds of spread spectrum modulation signals are small,but the high-order cumulant features have obvious differentiation.Considering the real-time processing,the fourth-order cumulant can effectively solve the identification problem of new and old spread spectrum modulation systems.