Under the background of the project——Signal Interference Suppression in digital satellite communication systems, it built a mathematic model and proposed a new interference detection algorithm, FFT interference detection, in order to suppress the narrowband interference in the FDMADQPSK channel.

As a very bandwidth-efficient and power-efficient modulation format, Gaussian minimum shift keying (GMSK) is important for power-limited digital satellite mobile burst communication system having nonlinear channel with fading and Doppler frequency shift.

In this paper, firstly we analyze in detail the relation between E_b/N_0 and (C_0+N_0)/N_0 in the digital satellite communication.

QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well.

Simulation results show that the proposed method is of value for engineering application in satellite communication systems.

Research on GMDSS satellite communication system simulator based on Visual C~#.NET;

A further analysis was made on the rain attenuation char-acteristic of the Ka band satellite communication system by integrating with the landform and the climate distribution pattern in our country.

A design method for implementing regional coverage satellite communication system with medium earth orbit(MEO)common-track constellation(CTC)was studied.