一种无特征混沌扩频波形的设计

A Featureless Chaotic Spread Spectrum Waveform

混沌扩频波形具有很高的类随机性和复杂性,被广泛运用于安全保密通信领域。但是,常规的混沌波形的频谱通常是一个有色频谱,从而为敌对检测截获方提供了可利用的有效特征。因此,从混沌序列设计出发,设计了一种无特征的混沌扩频序列,并且利用该混沌扩频序列产生出一种无特征混沌扩频波形。仿真结果表明,该波形在一阶到四阶的累积量特性都与高斯白噪声保持一致,使其无法与高斯白噪声区分,从而使波形具有很好的低检测低截获特性。

The chaotic spread spectrum waveform ,as with high randomness and complexity, is widely applied in the fields of security and private communication. However the conventional chaotic waveform usually exhibits colored spectra, thus providing discernible features for the advisary to detect and acquire the transmitted data. The characteristic of chaotic isequence is discussed, and a featureless chaotic spread spectrum sequence designed. And based on the featureless chaotic sequence, a featureless chaotic spread spectrum waveform is generated. Simulation analysis indicates that, all cumulant from the first order up the fourth order of waveform is consistent with the White Gaussian noise, no difference with the White Gaussian noise, so the featureless chaotic spread spectrum waveform has fairly low detection probability and interception probability.