DefinePK

Abstract

Narrow band interference (NBI) is inevitable in multicarrier communications. The source of NBI may be intentional or non intentional. The performance of the receiver is degraded if the NBI is treated as noise. The bandwidth of the NBI or the number of carriers that are jammed by the interfering sources is very less compared to the total bandwidth of interest of the receiver. Such sparseness enables the application of sparse signal processing principles in the detection and cancellation of the narrow band interference. In this paper, we consider an orthogonal frequency division multiplexed (OFDM) based wireless system and few of its subcarriers are jammed or affected by the narrow band interference. We propose the techniques for cancellation of the NBI interference from the received signal based on compressive sensing (CS) framework and compare its performance with conventional techniques and as well as with the case where the NBI is treated as noise.