【作者】 张佳胤； 张振国； 刘兴钊；

【Author】 Jiayin Zhang Zhenguo Zhang~+ Liu Xingzhao (Dept.of Electronic Engineering,Shanghai Jiao Tong University)

【机构】 上海交通大学电子工程系； 吉林大学电子科学与工程学院；

【摘要】 随机断续谱信号可以降低外部窄带干扰对于高频超视距雷达所产生的影响。但是由于雷达系统对于多普勒分辨率的要求,限制了在长达数百秒的相干积累时间内断续谱信号频谱选择的灵活性。本文针对速度分辨性能要求与抗干扰性能要求之间存在的矛盾,提出了使用一种将数个具有不同频谱分布的短相干积累时间随机断续谱信号子段拼接而成的信号。该种信号不仅保持了原有随机断续谱信号速度分辨性能,而且具有更高的频率选择灵活性以提高系统的抗干扰性能。更多还原

【Abstract】 A randomly intermittent-spectrum waveform is used to avoid the external interferences for the over-the-horizon high frequency(OTH-HF) radar.However,the flexibility of spectrum distribution in the coherent integration time(CIT) of several hundred seconds is restrained to meet the requirement of the Doppler resolution.A modified waveform with several sub-CITs is proposed to tackle the contradict requirements of both the anti-jamming and Doppler resolution.This waveform can obtain the Doppler resolution comparable to that of the system with a long CIT as well as more flexibility of spectrum distribution.更多还原