A novel method for infrared detection

Signal can be weaken and drown by noise after long-distance transmit.Measuring the weak signal with high accuracy and meeting the real-time requirements is key problem to infrared detection.Ap-FFT,all phase fast Fourier transform,is introduced to weak infrared signal detection and restore.Under the condition of low resolution spectrum,the cyclic shift superposed normalized ap-FFT algorithm will restore spectrum with leak to without leak approximately.And then,it can acquire parameters of frequency shift rapidly and accurately.Compared with FFT method,it can measure accuracy and be real time.MATLAB was used to carry out simulation analysis.The results show that the method is effective and feasible and can be offered for infrared detection.