微弱电信号检测方法回顾_赵吉祥.pdfVIP

20 3 V ol. 20 No. 3 2009 9 Jour nal of China Univer sity of Metrology Sep. 2009 = 100421540 2009) 0320201210 1 1, 2 3 2 2 , , , , 1. , 3 10018; 2 . , 201203; 3. , ) = , . , ) ) ) , . , , LabVI EW , . = ; ; = TN 911. 7 = A A r evi ew on weak electr ical sign al det ect ion 1 1, 2 3 2 2 ZH AO Ji2xiang , CH EN Chao2chan , WANG H uan , LU Fu2min , SANG Yu 1. In st itu t e of Signal and Informat ion Processing, China Jiliang University, H angzhou 310018, Ch ina; 2. Shanghai In st itu t e of Measur ement and Test Technol ogy, Shanghai 201203, Ch ina; 3. F aculty of Inform at ion T ech nology, Macau University of Seience and T echn ology, Macau, China) Abstr act : A review on the theor ies and techniques for w eak elect rical signal detection. It put great emphasis on the w eak electrical signal that was bur ied in st rong noise. T he route t hat was ar ranged in the pap er based on the proper ty of the sy stem that was linear or nonlinear . The linear system was divided into time domain met hod which contained cor relate detection , lock2in am plifier , sampling integrator, digital multipoint average and time aver aging method, frequency domain method which p ays attention to the power spectr um analyzing, and time2 frequency domain method including wavelet analy sis and fr act ional Four ier tran sform. The nonlinear