常见数字通信信号的谱线特征分析

不同调制方式的数字通信信号做非线性变换后其频谱往往具有不同的谱线特征，该文针对常见的数字通信信号，对其二次方与四次方的傅里叶谱线特征进行了理论分析，解释了谱线的产生原因并介绍了其潜在的应用价值。仿真实验表明，信号谱线特征在低信噪比及多径衰落信道环境下具有良好的稳健性，在通信信号处理方面具有良好的应用价值。

Spectrum Line Feature Analysis for Digital Communication Signals

Digital communication signals of different modulation schemes,with the nonlinearities applied to the complex envelope,always manifest themselves in spectrum line feature.In this paper,a complete theoretical analysis for the square and quartic spectrum line feature is carried out.The spectrum line's existence,position and amplitude are deduced,which can server as a robust feature for potential application.Computer simulation results indicate that the spectrum line can be extracted even in the serious noisy a...