向下兼容DAMB系统信道编码的研究  

Research for channel code of the get down compatible DAMB system

作　　者：严添明[1] 

机构地区：[1]湄洲湾职业技术学院,福建莆田351254

出　　处：《宁波职业技术学院学报》2007年第5期68-70,80,共4页Journal of Ningbo Polytechnic

基　　金：国家自然科学基金资助项目(60072013);江苏省人才基金资助项目(3004001016)

摘　　要：对向下兼容DAMB系统中的信道编码进行了研究。在DAMB虚拟无线电Matlab仿真平台仿真时采用迭代多级译码方法,分别进行了一次和二次迭代;同时,采用二元Turbo编码,接收端采用串联迭代译码。在Matlab平台上针对DRM标准建议的多级删除卷积码(RCPC)和Turbo码的数字调幅广播系统两种编码方法,分别在AWGN信道和Rice衰落信道中进行了性能仿真。结果表明,Turbo码可获得比两次迭代多级译码更好的性能。在AWGN信道下,Turbo码经过10次迭代译码能获得近3dB增益;在Rice衰落信道下,Turbo码经10次迭代译码可以获得近2dB左右的增益。This paper is researching for channel code of the get down compatible DAMB system, at the virtual wireless of DAMB simulating platform with matlab, simulating with iterative multilevel decoding method, carded on one and two times iterative. At the same time, adopt two cells Turbo code, receiver adopt string iterative decoding. Two kinds of coding with the multilevel Rate Compatible Punctured Comvolutional （RCPC） of the standard suggestion of DRM and Digital AM Broadcasting（DAMB） of Turbo code on the simulating platform with matlab, simulating respectively with AWGN channel and Rices decline channel,the result indicate that the better capability with the Turbo code than two times iterative. The Turbo code can acquire nearly 3dB gain pass by 10 times iterative under AWGN channel and can acquire nearly about 2dB gain pass by 10 times iterative under Rice decline channel.

关 键 词：DRM DAMB TURBO码 MaxLog算法 

分 类 号：TP911.22[自动化与计算机技术]