An Efficient Dft Based Channel Estimation for Ofdm Systems That Maintains Complexity-performance Trade- Offs and with Leakage Suppression

Although tremendous progress has been made on the past years on channel estimation in OFDM systems still it is considered as area of concern in wireless communication. A novel channel estimation technique with virtual sub carriers is proposed in this work namely DFT Based Channel Estimation for OFDM Systems that maintains Complexity-Performance Trade-Offs and with leakage suppression using virtual subcarriers. The flow of the proposed approach is initially starts with time do main (TD) index set estimation considering the leakage effect then followed by low-complexity TD post-processing to suppress the leakage. The proposed channel estimator approach outperforms the existing channel estimators in terms of efficiency and performance. Finally the performance and complexity of the proposed algorithm are analyzed by simulation results.