皮卫星地面站软件解调系统设计

Design of Demodulator for Ground Station of Pica-satellite

针对皮卫星地面站测试系统解调器的应用场合,文中研究和开发了一种基于LabVIEW虚拟仪器开发平台的软件解调器,提出了一种简化的遥测信号解调算法。利用LabVIEW控制数据的采集和存储,由VisualC++实现解调算法,并在LabVIEW中调用该程序来实现地面站遥测信号的解调。给出了解调算法的原理、Costas环跟踪方差MATLAB仿真和软件设计,通过误码率实验,测试结果证明了该设计的有效性。

For the ground station test system of pica-satellite telemetry signal, a software demodulator based on virtual instrumental platform, LabVIEW, is studied and developed. This paper presents a simplified telemetry signal demodulation algorithm. The telemetry signal demodulation of the ground station is realized through the Visual C＋＋ codes embedded in LabVlEW platform, with the data acquired and stored by LabVIEW. The theory , MATLAB simulation of tracking variance of Costes and software design of the demodulator are presented. Through the test of bit error rate （BER）, the result shows effectivity of the system.