Signal detection based on real-time channel and phase tracking

In order to solve the problem of fast time-varying channel in spaceborne AIS systems, a signal detection algorithm based on joint channel and phase real time tracking is proposed. The algorithm combines real-time tracking of the channel and phase to realize the joint estimation of parameters and symbol sequences. So, it avoids the serious distortion and crosstalk of the signal when the channel changes quickly, which can be better applied to the spaceborne AIS system to ensure the stability. Simulation results show that the algorithm has a better performance than differential detection, Viterbi decoding and per survivor processing (PSP) signal detection algorithm, and has strong ability of anti frequency offset. Keywords—Automatic Identification System, PSP Algorithm, Channel Tracking, Phase Tracking