Reduced-Complexity ICI Mitigation for Mobile SFBC-OFDM with Application to DVB-H

Effective inter-carrier interference (ICI) mitigation for MIMO-OFDM requires accurate channel estimation which is very challenging due to the large number and fast time-varying nature of the channel parameters to be estimated using scattered pilots. We present a novel SFBC-OFDM scheme for doubly-selective channels and a reduced complexity channel estimation algorithm which exploits the banded and sparse structure of the channel in the frequency and time-domains, respectively. Furthermore, we design an FIR-MMSE ICI cancellation algorithm for mobile SFBC-OFDM and demonstrate its effectiveness for digital video broadcasting-handheld (DVB-H) systems.