摘要
本文综合分析了几种典型高频地波超视距雷达波形的特点 ,针对这些波形在高频段电磁干扰严重条件下可用连续频带较窄的问题 ,提出了一种依据外部电磁环境监测结果来截断干扰频段的波形 .这种波形能够有效地利用不连续频段 ,从而提高雷达的有效带宽和抗干扰能力 .针对波形频谱截断后引起的距离旁瓣过高问题 ,本文采用一种改进的自适应目标回波重建算法来处理 ,达到较好的结果 .
In this paper the characteristic of several typical HF radar waveforms are synthetically analyzed and compared.A new waveform with interrupted spectra is presented to improve the narrow continuous bandwidth usable in heavily congested electromagnetic environments.By cutting off the interference spectrum based on the result of the electromagnetic environment surveying system,HF radar could make use of the fractional silent spectra.This would greatly improve the radar′s anti jamming ability and effective bandwidth.Moreover,an improved adaptive targets echo reconstruction algorithm is used.Simulation results show that it could successively suppress the high sidelobe with this waveform.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2002年第3期437-440,共4页
Acta Electronica Sinica
关键词
波形设计
旁瓣抑制
频谱截断
信号处理
高频雷达
waveform design
sidelobe suppression
interrupted spectra
signal processing
