无人机数据链信道编码模拟方法研究

摘要

Channel coding is an important approach to improve the reliability of communication.To satisfy reliability requirements of unmanned aerial vehicle (UAV) data link when transmits remote measurement and remote-controlled commands, this paper researches one channel coding simulation method based on UAV data link.Through code stream generating of channel coding、 transmission channel model loading、 microwave instruments real-time drive、 multithread programming and thread synchronization these key technologies, the method have simulated the principle and method of encode and decode in microwave anechoic chamber with different code rate of convolution codes、Turbo codes and LDPC codes; The testified result of simulation has shown that it has validated channel encode and decode approach of UAV data link through the simulated method of channel coding, and made the data link system's bit-error-ratio below 10-5, successfully to meet the high reliability transmission requirements of the UAV data link.%信道编码是提高通信可靠性的重要途径,针对无人机数据链传输遥控/遥测指令时的高可靠性要求,研究了无人机数据链信道编码模拟方法;该方法通过信道编码码流生成、传输信道模型的解算与加载、微波仪表实时驱动、多线程编程与线程同步等技术,在微波暗室环境内模拟了码率可变的卷积码、Turbo码、LDPC码的编解码算法;仿真验证结果表明,通过信道编码模拟方法,验证了无人机效据链的信道编码与解码方案,使数据链的误码率达到了10-5以下,满足了无人机数据链高可靠性要求.