基于巴克码的飞行遥测系统采编器设计

摘要

To solve the problem of short-term interruption of information and data frame dropping when aircraft is in the blackout area,a design method of multi-channel encoder based on the barker code is proposed.This method adopts barker code to do the hybrid encoding frame for the collected multi-channel signal,it can do the effective separation for data on the receiving end.Designing the method by using the FPGA and detecting specific lost frames of data by using MATLAB to decode,the results show that this sampling encoder completes the effective frame process,achieves the desired design requirements,the error rate reduces 25% when SNR is 5 dB.It improves the ability of data error correction and discrimination,and enhances the robustness of flight telemetry system.%针对飞行器处于黑障区时信息短时中断,产生数据丢帧的问题,提出了一种基于巴克码的多路混合编码器设计方法,该方法采用巴克码对采集的多路信号混合编帧,可以在接收端对数据有效分离.采用FPGA设计,并用MATLAB解码以检测数据的具体丢帧和误码率情况.结果表明,该采编器对采集的多路数据信号进行了有效编帧,达到了预期的设计要求,在信噪比为5dB时误码率减小了25%,且提高了数据的纠错能力和识别力,得到了和理论分析的一致的结果.