Super orthogonal differential space-time trellis coding and decoding

In this paper, a differential space-time trellis-coded scheme, based on super orthogonal space-time trellis codes (SOSTTC), is proposed. Based on its trellis structure, a low-complexity suboptimal differential decoder using the per-survival processing technique (PSP) is developed. In slow fading channels, it can approach the performance of SOSTTC with coherent decoding. Furthermore, an adaptive receiver is presented for time-varying channels, in which no training data is needed. Simulation results show that our scheme can achieve a good performance in both slow fading and time-varying fading channels with a reasonable complexity.