非合作卫星测控信号调制体制识别方法研究

Research on modulation recognition method of TT&C signal of non⁃cooperative satellite

国内外遥测工作频段涵盖L/S/C/X/Ka频段,主要测控工作体制为AM‑FM、PCM‑FM、PCM‑PM、PCM‑PSK‑PM、PCM‑BPSK‑PM、PCM‑QPSK‑PM、PCM‑CDMA‑BPSK等。针对7种主要测控体制信号,梳理出6个反映信号特征的识别参数,设计了调制体制识别流程,仿真表明在SNR>5 dB的条件下,针对7种体制的调制类型识别率可达到90%。

The domestic and foreign telemetry frequency band covers L/S/C/X/Ka frequency band.The main telemetry and control systems are AM-FM,PCM-FM,PCM-PM,PCM-PSK-PM,PCM-BPSK-PM,PCM-QPSK-PM,PCM-CDMA-BPSK and so on.According to the 7 main signals,6 identification parameters reflecting the signal characteristics are carded out,and the identification process of modulation system is designed.The simulation results show that under the condition of SNR>5 dB,the recognition rate of modulation types for the 7 systems can reach 90%.