Channel estimation algorithm for OFDM based fixed wireless access (FWA) networks

In this paper, we investigate the use of pilot symbols assisted channel estimation over broadband fixed wireless access system where pilot tones are transmitted over equally spaced sub-carriers of OFDM. The Least Square Error (LSE) algorithm is investigated to estimate broadband Fixed Wireless Access (FWA) channels. The performance in terms of Symbol Error Rate (SER) of the broadband wireless system is then compared with the perfect channel assumption. The effect of varying the location sub carriers for pilot symbols is also investigated along with the power variation of the pilot tones transmitted with respect to the information symbols. The performance comparison shows good estimation of the time varying channel. The simulation results are plotted using BPSK /QPSK modulation schemes.