Compressed sensing based channel estimation for uplink OFDMA systems

Abstract

The paper considers a time domain channel estimation approach for uplink OFDMA (Orthogonal Frequency Division Multiple Access) systems. Although frequency domain channel estimation schemes are widely used for those systems, we propose time domain channel estimation schemes by taking advantage of the sparsity of channel impulse response with compressed sensing. Numerical simulations show the merit of the proposed schemes, which demonstrates the validity of the time domain channel estimation approach for OFDMA systems.