Low complexity MMSE based channel estimation algorithm for the IEEE802.16d WMAN standard

This paper studies the effect of channel estimation in WiMAX system. The channel estimation is based on the principle of pilot-symbol-aided channel estimation (PACE) in frequency domain. The algorithms used here are based on the least squares (LS) and the minimum mean squares error (MMSE) approaches. Furthermore we propose a simple method to reduce the computation complexity of MMSE algorithm significantly which has a desirable performance. In the end, our result will quantitatively demonstrate the effect of LS, MMSE and proposed low complexity MMSE algorithms for uncoded IEEE802.16d standard of WiMAX system.