An SC-FDMA inter-cell interference suppression method based on a time-varying filter

Abstract

In an SC-FDMA uplink network, where the universal frequency reuse factor is one, heavy inter-cell interference in the same sub-band between adjacent cells is induced and it significantly degrades the system performance. Current interference suppression methods focus on power control and resource allocation without considering the signal's time-frequency distribution characteristics. Different from previous works, this paper proposes an SC-FDMA inter-cell interference suppression method based on the time-frequency distribution of the SC-FDMA signal. The proposed method adopts a linear time-varying filter to process the received signal, and the pass region of the filter could be obtained from the time frequency distribution of the received signal with the interference power threshold constraints. Simulation results show that the proposed scheme can improve the SINR performance of the network.