摘要
针对室内OFDM可见光通信系统受多径效应干扰易出现误码的问题,文中提出一种在系统中加入级联码以纠正误码的方法。该方法依据RS码的强纠错能力和Turbo码的近香农限特性,将RS码和Turbo码串联组成RS-Turbo级联码。RS-Turbo码用在OFDM调制之前,作为系统的信道编码方式以纠正误码。文中通过MATLAB搭建室内OFDM可见光通信系统模型,仿真比较RS码、Turbo码和RS-Turbo码对系统抗误码性能的影响。仿真结果表明,在多径效应干扰下,使用RS-Turbo码的系统抗误码性能最佳,能有效降低误码率。
Indoor OFDM - based visible light communication system is prone to appear bit errors under interter- ence of multipath effect. In order to solve this problem, this study proposed a method of adding concatenated code to the system. Combining the strong correction capability of RS code and the near Shannon limit characteristic of Turbo code, the method selected RS code and Turbo code to tom1 RS -Turbo concatenated code. The system used RS - Turbo code as channel coding to correct bit errors betore OFDM modulation. The study used MATLAB to build Indoor OFDM -based visible light communication system model, and compared the influence of RS code, Turbo code and RS -Turbo code on the correction performance of system. The result of simulation indicated the system with RS - Turbo code had the best correction perfommnce and reduced bit enor rate effectively.
作者
董岳
王京梅
房晓瑜
晏子杰
DONG Yue, WANG Jingmei, FANG Xiaoyu, YAN Zijie(School of Microelectronics and Solid - state Electronics, University of Electronic Science and Technology of China, Chengdu 610054,China)
出处
《电子科技》
2018年第10期11-14,共4页
Electronic Science and Technology
基金
预研领域基金(6140758010116DZ02001)
