An interference cancellation scheme-based carrier frequency offset estimation for OFDM uplink transmissions

This paper addresses the problem of resource management in the presence of inter-carrier interference (ICI) and multipath fading channel for orthogonal frequency division multiplexing (OFDM) systems. OFDM is a promising technique for the broadband wireless communication systems. However, the OFDM communication system is sensitivity to the ICI which arises because of Doppler spread and carrier frequency offset (CFO). To solve these problems, an optimization method is exploited, and a computationally efficient method using stochastic optimization techniques is proposed. The simulation results show that these derived optimal solutions and proposed suboptimal algorithms as compared with the uniform power allocation algorithm or conventional water-filling algorithm can significantly improve the performance of the OFDM systems.