基于认知的抗折叠扩展杂波波形设计方法

高频天波雷达系统中,远距离扩展杂波经距离折叠进入雷达接收机淹没低多普勒检测区域,严重影响低速目标检测性能。提出一种基于认知的脉间相位编码信号来抑制这一折叠扩展杂波,波形参数可实时调整,以适应时变的电离层。这种波形在使距离折叠扩展杂波变窄的同时,还可将其搬移到频谱指定区域。给出了波形参数设计方法,并对波形可行性进行了讨论分析。仿真实验表明,该波形能有效抑制折叠扩展杂波。

Waveform design of range-folded spread clutter mitigation based on cognition

In high-frequency sky wave radar system, the long-range spread clutter folded into the radar receiver will submerge the low-Doppler region and seriously affect the detection performance of the low-velocity target. In order to achieve the target detection correctly, it is necessary to suppress the range folded clutter. In this paper, an inter-pulse phase coded waveform is designed to suppress the range-folded spread clutter,and the waveform parameters can be updated in real time. This waveform can narrow down the range folded spread clutter while moving it to the specified spectrum area. The parameter design method is given and the viability of the waveform is analyzed. Simulation results show that this waveform can effectively suppress range folded spread clutter.