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A Research on Anti-jamming Method Based on Compressive Sensing for OFDM Analogous System

International Conference on Communication Technology (ICCT)(2017)

Univ Elect Sci & Technol China

Cited 10|Views3
Abstract
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.
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Key words
compressed sensing,signal recovery,anti-jamming,OFDM
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要点】:本文提出了一种基于压缩感知的OFDM系统抗干扰方法,通过利用传输信号的稀疏性而非干扰信号的频谱稀疏性,有效应对脉冲干扰和窄带干扰。

方法】:作者采用传输信号的稀疏性,结合信道编码引入的稀疏性,使用冗余字典在接收端完成信号的稀疏恢复。

实验】:通过模拟实验验证了该方法的可行性和普遍性,实验使用的数据集未具体提及,但结果显示了方法的抗干扰性能。