A frequency offset estimation scheme for a T-DMB software baseband receiver

To avoid inter-carrier interference caused by frequency offsets (FOSs) in a T-DMB receiver based on OFDM, accurate FOS estimation is essential. Since the T-DMB system transmits only a phase reference symbol (PRS) in each frame, accurate FOS estimation of data symbols in each frame is difficult when a T-DMB baseband receiver is implemented in software. This paper presents a FOS estimation scheme for a T-DMB software baseband receiver. The FOS can be estimated by monitoring an abrupt change in fractional FOSs for adjacent symbols. Results demonstrating the validity of the proposed FOS estimation scheme are given.