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瞬态干扰是天波超视距雷达中一类常见的干扰,会降低雷达目标的可检测性,需要加以抑制。文中分析了雷达接收回波的多普勒频率稀疏性,建立了由潜在回波信号构成的过完备字典,使得雷达接收回波在该字典下有稀疏表示形式,同时提出了基于压缩感知的天波雷达瞬态干扰抑制方法。该方法利用压缩感知重构雷达接收回波,由其代替瞬态干扰位置上的原始信号,从而实现瞬态干扰抑制。实测数据处理证明了该文方法的有效性。
Transient interference is a common type of interference in sky-wave over-the-horizon radar, which reduces the detectability of radar targets and needs to be suppressed. In this paper, we analyze the sparseness of Doppler frequency of radar received echo and establish an overcomplete dictionary composed of potential echo signals, which makes radar receive echoes have a sparse representation under the dictionary. At the same time, we propose a sky wave based on compressive sensing Radar Transient Interference Suppression Method. In this method, compressed sensing radar is used to receive the echo, which replaces the original signal at the position of transient interference to achieve transient interference suppression. The measured data processing proves the effectiveness of the method.