Optimal orthogonal pilots design for MIMO-OFDM channel estimation

Abstract

This paper presents a pilot based channel estimation method for MIMO-OFDM systems, the combination of MIMO with OFDM is used to increase the bit rate as well as capacity. The existing channel estimation methods uses more OFDM periods (STBC) and gives high MSE(conventional pilots). The proposed channel estimation method has very low complexity, With these orthogonal pilots we can obtain the optimal MSE which is 25% of conventional pilot method MSE and it effectively utilizes OFDM periods compared to STBC pilot method. Experimental results show that the proposed method achieves higher accuracy and gives better performance.