基于反相对称法的相邻频带噪声的相关性研究

Noise correlation in adjacent frequency band based on phase-inversion symmetric modulation

针对如何在频域使用反相对称法来进一步提高通信中的信噪比问题,给出了一种计算噪声相关性的办法,研究了不重叠和有部分重叠两种情况下的相邻频带噪声的相关性.证实了相邻频带的噪声具有相关性,且这种噪声的相关性及其稳定性随着带宽的增加而减小.论证了相邻频带的噪声相关性随着频带重叠程度的减小而线性减弱,为使用反相对称法来进一步提高通信中的信噪比提供了指导,并为通信噪声理论增加了新的内容.

For promoting the signal-to-noise ratio using the phase-inversion symmetric modulation in frequency domain,a method for computing the correlation of noise is presented and the correlation of noise in adjacent frequency bands in the case of partially and fully overlapping is researched.The existence of relevance of noise in adjacent frequency bands is authenticated,and both the relevance and its stability become stronger as the width of frequency band decreases.The correlation of noise in adjacent frequency band decreases linearly as the overlap decreases in adjacent frequency bands,which provides the guidance for further promoting the signal-noise ratio using the phase-inversion symmetric modulation and enriches the theory of communication noise.