Aiming at the important role of infrared search systems in modern wars,in the paper the systems classification and composing ,key techniques,primary technical demands on tactics,development status and trend are summarized.
The effeCt of signal processing on the operating range of IR search system is analyzed, the traditional operating range equation is corrected An operating range calculating method isgiven and an overall Performance factor for evaluating overall system performance is introduced . Itprovides a correct theoretical basis for system design and its performance evaluation.
Taking the signal processing unit of an IR searching system as a pulse receiver, and considering the effect of bandwidth of the pulse receiver on the output signal-to-noise ratio, the range equation of IR searching system is derived.
According to the condition in which the pulse receiver will give the optimum output signal-to-noise ratio, the dependence of bandwidth of the Signal processing unit on the dwell time of the detector is determined, and the corresponding range equation is obtained, thus providing the guidelines for designing and evaluating the performances of the IR searching system.
Operating Distance Equation and Its Equivalent Test for Infrared Search System with Full Orientation
An operating distance equation of infrared search system with full orientation has been derived for a system design with an infrared point target and with the regular atmosphere condition and objective radiation properties.
The traditional operating distance equation of infrared search system is corrected.
The equation and method can be used to design and test system, and to evaluate comprehensive performances for the infrared search system.