Adaptive processing method for interference cancellation in sky-wave OTHR

Abstract

An algorithm is proposed to cancel the spatially non-stationary high-frequency (HF) interference in the returns of sky-wave over-the-horizon radar (OTHR). The algorithm could suppress the interference in side-lobe effectively based on spatial adaptive processing. Meanwhile, the algorithm preserves the temporal coherence of the clutter echoes using the zeroth Doppler channel output, of which the clutter-to-interference-plus-noise ratio is improved, to constraint the weight vectors. The performance results demonstrate the superiority of this algorithm.

Keywords

• interference suppression
• radar clutter
• radar interference
• radar cross-sections
• doppler radar
• clutter-to-interference-plus-noise ratio
• interference cancellation
• sky-wave othr
• spatially nonstationary high-frequency interference
• sky-wave over-the-horizon radar
• temporal coherence
• clutter echoes
• zeroth doppler channel output
• spatially nonstationary hf interference
• spatial adaptive processing method