Performance of Interleaved OFDMA Uplink with ICI Self-Canceling Over Doubly Dispersive Channels

In the interleaved orthogonal frequency-division multiple access (OFDMA) uplink, the received signal from a user is corrupted by the intercarrier interferences (ICI) which result from both his own signal and other users´ signals due to Doppler spreads. Furthermore, different received signal powers and Doppler spreads between users may increase the effect of the ICI. Among the schemes which have been proposed to reduce the ICI in OFDM, the ICI self-canceling scheme is easily applicable to the interleaved OFDMA uplink. In this paper, we investigate the performance of the interleaved OFDMA uplink with and without ICI self-canceling over doubly dispersive channels. We analyzed the signal-to-intercarrier-interference-plus-noise ratio (SINR) improvement and we examined the symbol error rates and the error floors through simulation.