一种改进的DBS群目标分辨法

An Improved DBS Detection of Unresolved Radar Targets

多普勒波束锐化（ＤＢＳ）利用目标回波多普勒频率的差别来分辨目标。但它需要较长的相关处理时间。在这期间，由于目标本身的多普勒频率是变化的，当多普勒频率变化率较大时，容易产生频谱的混叠。本文提出一种改进的ＤＢＳ方法，相关处理时间随目标回波信号频谱宽度自适应调整，以克服频谱混叠，达到分辨目标的目的．仿真结果表明，它在目标多普勒频率变化率较大的情况下，仍然可以有效地对群目标进行分辨。

Due to the short distance among planes which fly in a group, the ordinary radar can't separate them.The method of Doppler beam sharpping(DBS) use the difference among the Doppler frequency of the targets to distinguish them,but a long processing time is needed. During this while,the Doppler frequencies of the targets are changing and the spectrum of these targets are easy to mix when the changing rate of Doppler frequencies is high.The adaptive DBS method is proposed to adjust the processing time and to limit the spread of the spectrum.It is shown by the simulations results that the improved DBS method is effective while the Doppler frequencies of group targets are changing fast.