A Carrier Tracking Technology under Helicopter Rotor Occlusion

In helicopter satellite communication system, how to realize fast and synchronous tracking of the carrier on the airborne receiver to carry out high-quality anti-rotor occlusion communication, is an urgent problem to be solved. In this paper, aiming at the helicopter satellite communication system, considering its unique characteristics of the rotor occlusion channel, an efficient frame structure design method is proposed, and a data-assisted carrier synchronization phase tracking algorithm is presented, which can effectively alleviate the problem of poor synchronization performance in anti-occlusion communication. The simulation results show that the design can make the bit error rate reach 10-6 when the signal-to-noise ratio is 3.8dB with the frame efficiency of 93.75%, which meets the requirements of the transmission system.