A improved space-time trellis coded OFDM scheme for frequency selective fading channels

We have studied the space-time trellis code (STTC) design in OFDM systems. By the research, especially by simulation, it is shown that, in multi-flat fading channels, the STTC-OFDM system can potentially provide more coding gain. We also found that the optimal STTC design is important for OFDM when using space-time codes (STC). By following this conclusion, an improved STTC is designed. Computer simulations have demonstrated a significant performance improvement of our proposed STTC-OFDM over the conventional STTC-OFDM. Further research for the STTC-OFDM system in other channels can also be pursued according to this scheme.