A Novel Bit-Interleaved Turbo-Hadamard Code Aided High-Order QAM Scheme for Anti-Jamming Satellite-Terrestrial Systems

With the dense deployment of satellite constellations and the rapid expansion of ground wireless communications, satellite-to-ground links are facing increasingly severe interference from aerial nodes and ground base stations. In addition, as the demand for satellite communications in services such as text, voice, and video continues to grow, the requirement for high information rates is also increasing. Therefore, satellite communication systems are now in urgent need of solving the anti-interference problem and improving the information transmission rate to meet the increasingly complex communication needs. Inspired by the good performance of bit-interleaved coded modulation (BICM) over wireless fading channel, we propose a novel bit-interleaved Turbo-Hadamard code (THC) aided high-order quadrature amplitude modulation (QAM) scheme for anti-jamming satellite-terrestrial systems, namely the BITHCM scheme. The scheme proposed in this paper takes into account the anti-interference performance and transmission rate of the system, and has strong interference resistance while ensuring high information rate. Through simulation, it is verified that the proposed BITHCM outperforms the THC-QAM system over both the additive white Gaussian noise (AWGN) channel and the Partial Band Noise Jamming (PBNJ) channel.