高频地波雷达的脉冲压缩和波形参数设计

高频地波雷达发射线性调频中断连续波信号,采用去斜方式的脉冲压缩.该脉压实际上是根据目标距离平移门控脉冲的梳状谱,所以雷达的距离分辨率等于梳齿宽度,文中给出了仿真实例;对于避免距离和速度模糊的波形参数设计进行了原理性的讨论,给出了避免距离和速度模糊的波形设计原则.对文献中的子脉宽限制条件进行了深入分析,指出该条件是不必要的.文中的研究对于设计高频地波雷达波形参数具有参考意义.

Pulse Compression and Waveform Parameter Design for HFGWR

Linear frequency modulated interrupted continuous wave (LFMICW) is utilized in high frequency ground wave radar (HFGWR) and the compressed pulse is obtained by deehirp. First, it is found in this paper that the deehirp is in fact to shift the comb spectrum of the gate pulse in terms of target range, and thus the range resolution of radar depends on the width of comb tooth, whieh is demonstrated by a simulated example. Then the wave parameter design principles avoiding the range and velocity ambiguity are presented. A deep theoretical analysis shows that the limit condition for sub-pulse width in some documents is unnec-essary. The research result in this paper is of great reference value for designing the wave parameters of HFGWR.