基于巴克码的飞行遥测系统采编器设计

针对飞行器处于黑障区时造成的遥测信息短时中断，产生数据丢帧以及误码率高的问题，提出了一种基于巴克码的多路数模混合编码器设计方法并进行了理论分析，该方法采用巴克码组对采集的多路数字信号和模拟信号进行混合编帧，可以在接收端对数据进行有效分离，此外，还可以利用巴克码将信号中的窄带干扰成分近似白化，减小了由多路产生的频偏。采用FPGA进行了设计，并利用Matlab解码以检测遥测数据的具体丢帧和误码率情况。经数值模拟和试验测试结果表明，该采编器对采集的多路模拟数据信号进行了有效编帧，达到了预期的设计要求，提高了数据的纠错能力和识别力，减小了误码率，得到了和理论分析的一致的结果。

Design of Flight Telemetry System Sampling Encoder based on the barker code

To solve the problem of short-term interruption of telemetry information and data frame dropping when aircraft is in the blackout area, a design method of multi-channel mixed signal with analog and digital sampling encoder based on the barker code is proposed. This method adopts barker code sets to do the hybrid encoding frame for the collected multi-channel digital signal and analog signal, it can do the effective separation for data on the receiving end, in addition, it still can use barker code to bleach the narrow-band interference composition of signal approximately, and reduces the deviation produced by multiplex. Designs by using the FPGA and detects specific lost frames of telemetry data by using Matlab to decode. The numerical simulation and test results show that this sampling encoder completes the effective frame process, achieves the desired design requirements, improves the ability of data error correction and discrimination, and enhances the robustness of flight telemetry system.