【摘要】 天波超视距雷达(OTHR)工作于高频波段,电波传播环境复杂,极易受到流星余迹回波等瞬态干扰的影响。目前提出的针对瞬态干扰的抑制方法大多需要预先抑制海、地杂波,复杂度较高,实用性不强。提出了将含瞬态干扰回波数据的频域视为复合正弦信号,使用高分辨算法(TLS-ESPRIT算法等)可以检测出干扰发生位置,再去掉被干扰数据段,并通过加权线性预测恢复有效数据,达到抑制干扰的目的。该方法的优点是干扰检测前无需预先抑制海杂波,实用性较强。仿真结果表明该方法的有效性。更多还原

【Abstract】 High-frequency(HF) sky-wave over-the-horizon radar(OTHR) operates in complex propagation environment and is highly sensitive to strong impulsive interference such as meteor trail interference.Present methods for suppressing impulsive interference have disadvantages of high computation cost and low feasibility,and most of them rely on clutter suppression.This paper proposes a novel method.Firstly,regarding phase spectrum of echo data as complex sinusoid signal,the data segment contaminated by impulsive interference is found out by using high-resolution algorithm detection(e.g.,TLS-ESPRIT).Then,the contaminated echo data segment is replaced by a new valid data segment reconstructed by using weighting linear prediction.A key advantage of this proposed method different from most of present methods is that it does not need to perform clutter suppression beforehand.The simulation results show that this method can efficiently detect and suppress transient interference.更多还原