An Iterative Algorithm of Channel Estimation for MIMO-OFDM Systems Based on Discrete Cosine Transform

Abstract

In this paper, we present an iterative algorithm of channel estimation for MIMO-OFDM systems based on discrete cosine transform (DCT). By exploiting the properties of DCT, the proposed method mitigates the aliasing effect introduced in discrete Fourier transform (DFT)-based channel estimation method. Further more, the proposed algorithm reduces the additive white Gaussian noise (AWGN) and inter-carrier interference (ICl) significantly by iteration. Simulation results show that the proposed method provides good MSE performance.