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激光半主动导弹系统——一种精密制导武器——用于末段寻的中,然而由大气和战场气溶胶后向散射体引起的杂波信号,使探测性能衰变。通过外场试验和计算机模拟,确定了目标和杂波信号之间的差异。在此基础上,研制出两种新的识别和探测技术,并对其作了评价。第一种技术兼有快速傅里叶变换(FFT)处理,反向滤波和自适应探测,而第二种技术是在时域中完成数字滤波而以频域评价结果。两种技术应用于实际目标和杂波信号,使信噪比改进10dB。自适应探测与反向滤波相结合,能给所处理的所有目标信号和杂波提供正确的判断。
The laser semi-active missile system - a precision guided weapon - is used in the final search, however, the clutter signal caused by atmospheric and aerosol backscattering from the battlefield decays the detection performance. Through field experiments and computer simulations, the differences between target and clutter signals were determined. On this basis, two new recognition and detection technologies have been developed and evaluated. The first technique combines fast Fourier transform (FFT) processing, inverse filtering, and adaptive probing, while the second technique performs digital filtering in the time domain and evaluates the results in the frequency domain. Both techniques are applied to the actual target and clutter signals, improving the signal-to-noise ratio by 10 dB. The combination of adaptive and inverse filtering provides the correct judgment of all the target signals and clutter being processed.