一类高斯色噪声信号的谱特性与生成

仿真无线时变信道的衰落特性常常需要具有一定功率谱形状的色高斯噪声信号。本文推导了无线信道快衰落特性的功率谱及其受限功率谱，分析了宽带高斯过程的谱特性和时间相关性，同时考察了具有高斯功率谱形状的信道阴影慢衰落的特性。通过有限正弦信号叠加近似生成了宽带色高斯噪声信号,确定了正弦分量的多普勒频率和多普勒系数。

The Power Spectrum and Its Generation for One kind of Colored Gauss Noise

The colored gauss noises (CGN) with deterministic power spectrum shapes are usually used to simulate the fading characteristics of wireless channels. The power spectral density (PSD) and its restricted form for radio channel suffering the fast fading is discussed and the spectral specialty and auto-correlation function of the wide band gauss process are analyzed. The time correlation of the shadowing channels with slow fading characteristics are also investigated. The wide band CGNs are approximately generated by means of finite sums of properly weighted sinusoids with uniformly distributed phases, and the Doppler parameters including the Doppler frequencies and Doppler coefficients are determined.