扩频信号通过非线性系统信噪比恶化分析

Signal-to-Noise Deterioration Analysis of Spread Spectrum Signal in Nonlinear Systems

本文分析了扩频信号通过平方律检波器和四次律检波器后信噪比的恶化程度,文中使用直接分析法分析平方律检波器,使用转移函数法分析四次律检波器,并且利用工程中实测得的数据与理论值进行比较。根据分析得到的结论为工程中更好地实现各次检波器提供了依据,且通过分析平方律和四次律检波器得出适于高次(偶次)律检波器的结论。

SNR of spread spectrum signal is deteriorated in nonlinear systems （ square detector and quartic detector）. This paper employs respectively direct- analysis method and transfer- function to analyze square detector and quartic detector, and uses practical data to prove that theoretic value is consistent with practical value. By analyzing square detector and quartie detector, the theoretic result offers proof for implemention of detector. The analvzing conclusion is applicable to even detector.