Abstract
The performance of high-frequency sky-wave over-the-horizon radar is affected by transient interference. Traditional methods used to suppress the transient interference in several steps. First, the position of the transient interference is localized in the time domain, and then the corrupted time samples are set to zero. Finally, the partial data are reconstructed by interpolation. However, the performance of the target detection would be significantly decreased if the interference corrupts a significant portion of the received signal. This paper presents a novel approach for suppressing the transient interference based on the relaxed principal component pursuit (PCP). Using a Hankel structured matrix constructed by the received signal in a given range cell, the transient interference in the Hankel matrix shows sparse property and the remainder signal shows low rank. Then the transient interference excision could be solved by the Relaxed PCP. Without transient interference location and data interpolation, the proposed method can remove the transient interference, and it is also helpful for improving the signal to noise ratio (SNR). The experimental results show the effectiveness of the proposed method.
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