Research on modulation recognition method of TT&C signal of non-cooperative satellite
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%.
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