信道编码在无人机数据链中的应用研究  

Channel coding in the data link of unmanned aerial vehicle

作　　者：余格非[1] 王振华[1] 李颖[1] 韩辉[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《重庆邮电大学学报（自然科学版）》2014年第6期845-849,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市自然科学基金(cstc2012jj A40033)~~

摘　　要：针对无人机(unmanned aerial vehicle,UAV)平台数据链机载端机所要求的信道编码算法简单、运算速度快、纠错能力强和实时性高等特点,研究分析了适用于无人机数据链系统的卷积码、Turbo码、LDPC(low density parity check code)码等信道编码的编译码特点,采用基于信道编码的OFDM(orthogonal frequency division multiplexing)传输方案设计了高速无人机数据链系统,并针对不同的编码方案分别进行了在Rayleigh衰落和Rician衰落信道下的性能仿真分析,仿真结果表明,在高速无人机信道下,不论在短码和长码情况下,综合考虑编译码实现复杂度和性能2个方面,LDPC码均表现出了比卷积码和Turbo码较优异的性能,可作为无人机数据链系统中较好的信道编码方案。LDPC码相比卷积码与Turbo码具有更好的误码率性能,是较好的解决方案。Channel coding is the key technology to improve anti-interference performance of data link system, the channel coding algorithm used for UAV（ unmanned aerial vehicle） data system should be simple, quick, reliable and real-time. We analyzed the system of data link of UAV and, we also compared the coding and decoding characteristics of convolutional codes, Turbo and LDPC Codes, finally we designed high-speed data link of UAV based on OFDM and simulated different coding schemes in Rayleigh fading and Rician fading channel respectively. Simulation results show that LDPC codes has better BER performance than Turbo codes and convolutional codes in the high-speed UAV data link channel; whatever is short code or long code, LDPC codes can be the better scheme for future UAV data link system.

关 键 词：无人机 数据链 信道编码 LDPC码 

分 类 号：TN9[电子电信—信息与通信工程]