脉冲频率编码信号在高频地波超视距雷达中的应用

Application of Frequency Coded Pulse Signal in a Ground Wave Over the Horizon Radar

本文就脉冲频率编码信号应用到高频地波超视距雷达中，进行了较详细的波形设计和处理研究。分析表明，脉冲重复周期与目标回波的距离延时和径向多普勒速度分量无关。因此，若将重复周期参差调制方式融合到频率编码信号中，可使信号具备时－频调制双重随机性。有效地加强了信号自身抑制干扰的能力。信号的处理采用了时间窗匹配相关处理，消除了距离模糊并扩展了信号参数的可选择范围。本文还给出了脉冲频率编码信号的设计步骤和参数选择的约束条件。

This paper detailedly studies the application of frequency coded pulse signal (FCP) to a high frequency ground wave over the horizon radar by designing signal waveform and processing. Analyzing results show that the pulse repetition interval is independent of the range delay of target return and its Doppler radial velocity.So, the modulation of irregular pulse repetition interval may be employed in FCP that the randomization of signal modulation would be obtained in both time and frequency domains. And the ability of restraining interference by signal itself may be enhanced. A time window matched related method is adopted in the signal processing to eliminate range ambiguity and expand the selections of signal parameters.Finally, this paper also provides the considerations of FCP design.