AN IMPROVED METHOD FOR THE ESTIMATION OF CARRIER FREQUENCY OFFSET IN OFDM SYSTEMS

In the latest development of Orthogonal Frequency Division Multiplexing (OFDM) communication system, the system performance can be distracted by the Frequency Offsets (FOs) which can demolish the orthogonality of the subcarriers, and hence leads to a number of impairments in the received signal, thereby making its detection incorrect. In this paper, a new threshold-based frequency offset estimation algorithm for Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. Through a detailed analysis and simulation over AWGN channel, it has been shown that the proposed method shows good performance, i.e., it offers low error variance as the SNR (signal to noise ratio) increases