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将红外搜索系统的信号处理单元视为脉冲接收系统,在考虑其带宽对输出信噪比的影响下,推导了红外搜索系统的作用距离方程。根据脉冲接收系统输出最大信噪比的条件,确定了红外搜索系统信号处理单元的频带宽度与探测器驻留时间的关系,并得到了相应的作用距离方程,为红外搜索系统的设计和系统性能的评估提供了依据。
The signal processing unit of the infrared search system is regarded as a pulse receiving system. Based on the influence of its bandwidth on the output signal-to-noise ratio, the distance searching equation of the infrared search system is deduced. The relationship between the bandwidth of the signal processing unit and the dwell time of the detector is determined according to the maximum signal to noise ratio of the pulse receiving system. The corresponding distance equation is obtained, which is the design and system performance of the infrared search system Provided the basis for the assessment.