Simulation and study on maximum permitted noise of airborne long-range laser range-finders
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1.
Luoyang Institute of Electro-optical Equipment, Aviation Industry Corporation of China, Luoyang 471023, China
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2.
Science and Technology on Electro-optic Control Laboratory, Luoyang 471009, China
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Received Date:
2017-12-06
Accepted Date:
2018-03-06
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Abstract
In order to improve the design feasibility of receiving system for an airborne laser rangefinder, the maximum allowable input noise level was analyzed according to the parameters of the maximum range and signal-to-noise ratio threshold. Noise was closely related to the sensitivity of laser reception. Based on laser ranging equation, the relationship between the minimum detection sensitivity and detection range was analyzed. The characteristics of echo spectrum, the bandwidth of detection module and amplifier were simulated. The magnification of echo signal and the value of output signal of main amplifier were calculated. At the same time, according to Gaussian white noise model and output signal value of main amplifier, the maximum allowable input noise value of laser ranging receiving circuit was calculated. The circuit was designed and tested. The results show that the deviation between laser reception sensitivity and theoretical value is 5.7%. The deviation between the maximum value of extinction ratio method and the theoretical value is only 1.5%. The method of noise analysis has important guiding significance for the design of receiving system of airborne long-range laser range-finders.
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Proportional views
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