OFDM Equalization in Nonlinear Time-varying Channels

In this paper, we consider OFDM systems operating in radio channels where both nonlinear effects and time variations are observed. Based on the structure of the distorted signal we suggest an equalization method that consists in estimation of the joint interference at the receiver and its further cancellation. Since the performance of the method is essentially defined by the accuracy of the channel estimate, the procedures of total interference cancellation and channel estimation are performed in the iterative manner. The efficiency of the method is confirmed by the presented simulation results.