Non-binary LDPC Codes for Rotor Occlusion in Helicopter Communication

Satellite communication is important in helicopter communication, it can effectively improve the communication range and communication capacity. Controlled by the installation conditions, satellite antenna will be influenced by helicopter rotor periodically, signal transmission will suffer periodic continuous fading and occur periodic burst errors. Non-binary LDPC code is a kind of advanced channel coding scheme, it has strong ability of error correcting. It can convert continuous bit burst errors into less M-ary symbol errors, so it has a good ability to anti burst error. In this paper, simulation of using non-binary LDPC codes to resist the burst errors in the helicopter satellite communication is placed, the results show that non-binary LDPC codes can correct the burst error well which are caused by helicopter rotors. In addition, this paper also discusses a method of decoding initialization in which zero is set in positions under covered, the results demonstrate that the way to set zero can obtain better decoding performance advantages, the performance improvement is about 0.2dB.