基于DSP的卷积码通信性能研究  

Study on the Performance of Communications with Convolutional Code Based on DSP

作　　者：肖雪芳 左石凯 苏国良 雷国伟[4] XIAO Xuefang;ZUO Shikai;SU Guoliang;LEI Guowei(School of Optoelectronic&Communication Engineering,Xiamen University of Technology,Xiamen 361024,China;Fujian Key Laboratory of Optoelectronic Technology,Xiamen 361024,China;Xiamen Engineering Center for LED lighting Application,Xiamen 361024,China;School of Science,Jimei University,Xiamen 361021,China)

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024 [2]福建省高校光电技术重点实验室,福建厦门361024 [3]厦门市LED照明应用工程技术中心,福建厦门361024 [4]集美大学理学院,福建厦门361021

出　　处：《厦门理工学院学报》2018年第1期60-64,共5页Journal of Xiamen University of Technology

基　　金：厦门理工学院国家基金预研项目(XYK201406);福建省青年骨干教师出国留学1:1配套项目(2015071065)

摘　　要：从卷积码的编译码原理出发,探讨了不同进制、不同码率下的编码结构。基于数字信号处理器平台,模拟搭建了卷积码的通信系统。引入扰码率的概念,从幸存路径、编码标志数、进制等不同侧面评估了卷积码的性能。结果显示,幸存路径越大,译码性能越好,但是却需要以译码复杂度为代价;编码标志数越大,抗噪性能越优,却需要以牺牲数据率为代价;而高进制编码不啻为改善性能和提高数据率的有效方法之一。该实验结果为DSP在无线通信中的应用提供了参考。Several formats and coding rates were investigated with the theorem of convolutional codes,and a communication system constructed and simulated based on digital signal processors(DSP).Interfered code rate was then introduced to evaluate the performances of convolutional codes in terms of the number of survived paths,encoding flags,and formats.The experimental results demonstrate that the decoding performance gets better with the bigger survival path at greater decoding complexity,the anti-noise performance gets better with the larger number of coding flags at worse data rates,and comparatively the high-format coding should be an effective way to improve the performance and data rates.

关 键 词：卷积码 通信性能 数字信号处理器 维特比译码 

分 类 号：TN911.22[电子电信—通信与信息系统]