A Novel Channel Estimation Scheme for Wideband OFDM Aeronautical Communication

The aeronautical wireless channel is a time-frequency double-selective channel, which will destroy the orthogonality of the OFDM sub-carriers remarkably, inducing a severe intercarrier interference (ICI). The aeronautic channel is also a sparse channel. So we could utilize the property of sparseness to design an appropriate channel estimation method. In this paper, a novel channel estimation scheme is proposed for OFDM systems applied in wideband aeronautical communication. The scheme mainly consists of three parts, including the blocks of phase lock loop, channel parameters estimator, and iterative cancellation. We investigated the scheme in en-route scenarios. Simulation results were carried out to evaluate the BER performances of OFDM systems with the proposed estimation scheme.