光纤无线通信系统中信号相关噪声信道优化技术研究

光纤无线通信系统（Radio over Fiber，ROF）的性能会受到与信号有关的噪声干扰而降低，如散粒噪声和相对强度噪声等。因此，为了改进光纤ROF的性能，提出了一种基于方差归一化变换的方法来实现归一化噪声功率。首先运用了一个更精确的噪声模型来分析ROF信道，从而更好地分析与信号有关的噪声。然后，采用方差归一化变换将与信号有关的噪声ROF信道转换为与信号有关的加性高斯白噪声信道，该噪声信道适用于常用的信号发送技术。实验结果表明：在信噪比方面，提出的方法能够显著地改善ROF性能。

Research on signal correlation noise channel optimization in optical fiber wireless communication system

The performance of optical wireless communication systems (Radio-over-Fiber, ROF) will be reduced by noise interference, such as shot noise and relative intensity noise. In order to improve the performance of optical fiber ROF, a method based on variance normalization transform is proposed to realize the normalized noise power. First, a more accurate noise model is used to analyze the ROF channel, so as to better analyze the noise related to the signal. Then, the noise related ROF channel is transformed into a signal additive Gauss white noise channel, which is suitable for common signal transmission technology. The experimental results show that the proposed method can significantly improve the performance of ROF in terms of signal to noise ratio.