Laser aerosol-scatter signal interception based on correlation detecting technology

To keep a balance between the detection probability and the false alarm rate(FAR) in the design of a scattered laser warning receiver, both theoretical and experimental studies were conducted to investigate the correlation detecting technology suitable for the scattered laser warning. On the basis of the analysis of the irradiance distribution and characteristic in time domain of the 1.06 m aerosol scatter in the low atmosphere, the theoretical sensitivity of the laser warning receiver(LWR) based on the correlation detecting technology were educed according to the experiment results of the improvement of signal-to-noise ratio and the corresponding operating condition of a correlation element. Then a scattered laser pulse correlation detector was developed, and the off-axis interception of aerosol scatter was achieved in the outdoor experiment. The research work demonstrates that applying correlation detecting technology to the interception of the aerosol scatter is effective in improving the detection probability of a LWR without the rise of the FAR.