Performance of multi-user MIMO OFDM channel estimation with LS and MMSE for 802.11n systems

High transmission data rate, spectral efficiency, and reliability are necessary for future wireless communications systems. In this paper, we study the performance of multi-user multiple-input multiple-output channel estimation methods using training sequences. We consider the popular linear least square (LS) and minimum mean-square-error (MMSE) approaches. The results of computer simulation show the improvement of system capacity in Rayleigh fading channel.