摘要： 为增强低信噪比环境下数据链的抗干扰能力,对基于固定阈值的能量检测法进行改进,提出基于能量检测的自适应阈值抗干扰方法。通过改变参数α,提高低信噪比环境下对干扰信号的检测概率。同时研究基于协作频谱感知的数据链认知抗干扰方法,在不同参数设定下,计算数据链对干扰信号的检测概率。分析结果表明,在低信噪比环境下,该方法可有效提高检测性能。

关键词: 数据链, 知抗干扰, 能量检测, 低信噪比, 自适应阈值

Abstract: In order to enhance the anti-jamming capability of data link in low Signal to Noise Ratio(SNR) environment,this paper improves the energy detection method based on invariable threshold and proposes an adaptive threshold anti-jamming method based on energy detection.By changing the parameters α,the detection probability of the jamming signals under the low SNR environment is improved.According to the proposed adaptive threshold detection method,this paper studies the cognitive anti-jamming method of data link based on cooperative spectrum sensing.Under different parameter settings,it calculates the detection probability of the data link to the jamming signals.Analysis results show that the proposed method can improve detection performance under the low SNR environment.

Key words: data link, cognitive anti-jamming, energy detection, low Signal to Noise Ratio(SNR), adaptive threshold

中图分类号: 

• TN925