大波门宽带雷达去斜脉压加权方法研究

A Study on Wideband Dechirped Radar with Long Range Gate

宽带雷达常采用去斜方式脉压并通过加权抑制脉压副瓣。然而随着波门宽度增加,直接去斜加权性能显著下降。文中结合理论推导和仿真计算,分析了波门宽度增加导致直接去斜加权性能下降的理论原因。并且针对以上问题,提出了分段加权和RVP补偿去斜脉压加权2种加权方法,有效地提高了大波门条件下的加权性能,通过仿真和实测数据对算法进行验证,结果证实了理论分析的正确性,有效地降低了波门宽度对加权性能的影响,在实际应用中具有一定意义。

The wide-band radar with dechirp pulse compression usually applies mismatch weighting to reduce sidelobe level. However, while range gate is being longer, the performance of the traditional weight function is reducing remarkably. In this paper, theoretical analysis and simulation, it is analyzed the reason that the long range gate lead to the dechirp traditional weighted per- formance decrease. Meanwhile, the segment weighting method and the weighting method with RVP offset are presented, which ef- fectively raise the performance of the weight function with long range gate. The theoretical analysis and the effectivity are proved by the simulation and the experimental data results and the practicability of the proposed method is also verified.