Design of the robust demodulator for mobile broadband satellite Internet access system

In this paper, we propose a robust demodulator structure for mobile broadband satellite Internet access systems. Especially, in order to achieve good synchronization under very low SNR, a large frequency offset, and Doppler frequency offset, with the constraints of mobile satellite communication, we design a demodulator which has robust algorithms for carrier frequency recovery compared with the conventional algorithms. The proposed technique can fulfill the stringent up-link link budgets at Ka band by operating at very low SNR.