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《Optics and Precision Engineering》 2002-04
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Modal identification of luminosity signals in frequency domain

ZHOU Jian-hua, BAI Zhao (Unit 61369 of CPL Army, Changchun 130022, China)  
Object luminosity signals were identified by means of digital signal processing(DSP) and modal identification. Modified luminosity signal was transferred to frequency domain by special discrete fourier transfer(DFT) which is like gabor transfer. Then, signal was filtered and partitioned into fine frequency bands. After that, Fisher's discriminance was used in frequency domain wth characters, which were energies of a group of selected fine frequency bands. The identification function matrix(IFM) was obtaind through recognized data and identification rulers were given. After unidentified data had been put into the IFM, they were categorized under the rulers. Three satellites' luminosity signals were identified successfully and difficulties like low SNR, abnormal errors from measurement, complex model of noise were overcome.
【Fund】: 国家“8 6 3”项目 ( 86 3_80 8_2 .2 )
【CateGory Index】: TP391.4
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