基于眼图分析的数字滤波选取方法分析

在数字通信系统中,由于存在码间串扰而影响通信质量,如何减小码间串扰的影响是数字信号传输面临的一个问题。经过分析发现,在传输过程中选取合适的滤波器及其特征参数能够不同程度地减小码间串扰影响。通过对相同干扰条件下,数字基带经过不同的滤波器后形成的眼图进行分析,进而选取了适合传输的滤波器及其特征参数,用最佳传输滤波器的方法减小了码间串扰,从而提高了信号的传输质量。

Analysis of Digital Filtering Selection Methods Based on Eye Diagram

In digital communication systems, as a result of the existence of inter-symbol interference which has effects on communication quality, How to decrease the negative effects becomes an urgent problem in the transmission of digital signal. The appropriate selection of filters and their characteristic parameters in the course of signal transmission will decrease the effect of Inter-symbol interference at different levels. In the same interference conditions, after the analysis on the eye diagram generated by different digital baseband signal filtering, chooses the appropriate transmission filter and its characteristic parameters, which by the means of optimal transmission filtering decreases the inter-symbol interference and improves the transmission quality of signal.