A research on anti-jamming method based on compressive sensing for OFDM analogous system

摘要

The intentional or unintentional interferences often bring performance losses to the broadband communication systems such as OFDM (Orthogonal Frequency Division Multiplexing) systems. Traditional interference suppression methods based on compressed sensing usually firstly recover the jamming signal then remove it from the received signal, which employs the sparse features in jamming signal's frequency spectrum. However, those methods are ineffective to the impulsive interference. In this paper, we propose a novel scheme to directly recover the transmitted signal. Rather than using the spectrum sparseness of jamming signals, we exploit the sparseness existed in transmitted signal brought by the channel coding, and use the redundant dictionary to accomplish the sparse recovery process at the recevier. That makes our method uesful for pulse jamming or narrow band jamming signal. The simulation results shows the feasibility and universality of the proposed scheme.