带有均衡因子的反相对称调制法的研究

A Study on Symmetric Phase-inversion Modulation with Balance Factor

在对实际通信系统中窄带噪声相关性分析的基础上,介绍了反相对称调制法的系统模型,该模型中信号在两路近似的信道中传输,并在其中一路信道中引入增益因子。论证了该模型中增益因子、两路噪声功率比以及两路噪声相关性这三者的关系,从理论上得出了这三者关系的数学表达式。最后利用MATALAB仿真工具强大的数学仿真功能对这三者的数学表达式进行仿真,从图像上便可直观地验证出反相对称调制法能有效提高信噪比、具有优越抗噪声性能的结论。

Based on correlation analysis of band-limited noise in practical communication system, a model of Phase-Inversion Symmetric Modulation system was introduced. There are two similar channels in the model, and a gain factor was introduced in one channel. The relationship between gain factor, noise power ratio and noise correlation was considered, and a mathematical expression for that was obtained. At last, simulation was made by using MATALAB because of its powerful mathematical simulation capability. From the simulated graph a conclusion was drawn, which shows this PISM would improve signal to noise ratio effectively, and PISM has superior anti-noise performance.