The analysis of 2DPSK signal transmission characteristics of terrestrial mobile satellite channel

According to the defect of satellite mobile communication channel with remote transmission distance, serious signal fading and severe interference, based on in-depth theoretical research and simulation analysis, full shadow channel model which is applicable to the characteristics of satellite mobile communication channel was given. On this basis, Bit error rate (BER) of 2DPSK signal transmission of narrowband and broadband modulation system were compared, simulation shows that using broadband communication system model can effectively ameliorate transmission performance deterioration due to multipath fading and shadowing. When BER is 10-3 and elevation is 60 degree in the broadband single user model, there is 4.6dB SNR gain relative to the narrow band system. In addition, some essential conclusions about the transfer characteristic and its computational formula were presented. And also some important guidance was given for actual mobile communication of non-geostationary orbit satellite.