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《Laser & Optoelectronics Progress》 2016-06
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Effect of Time-Frequency Disturbance on Performance of Dual-Frequency Laser Coherent Detection System

Zhang Jianhua;Yang Dezhao;Gao Jie;Liu Ximin;Shanghai Radio Equipment Research Institute;  
The performance of laser detection system(LDS)is directly influenced by the velocity identification capability.Due to the bandwidth restriction of the receiver,the laser Doppler shift of the high speed targets can not be detected in LDS.A dual-frequency laser coherent detection(DLCD)system is introduced consequently,which has successfully solved the problem and enhanced the system capabilities obviously.Based on the theory of the DLCD,the signal-noise ratio(SNR)influenced by the amplitude disturbance,the phase disturbance and the frequency disturbance are analyzed,and the characteristics different from the signal-frequency laser coherent detection(SLCD)are illuminated.The simulation results indicate that the amplitude disturbance effect on the SNR of DLCD is consistent with that of the SLCD.For various kinds of frequency and phase disturbance,the SNR of DLCD is higher than that of the SLCD.When the phase disturbance increases to 0.5π,the SNR of SLCD is 0dB,while the DLCD is still higher than 18 dB.
【CateGory Index】: TN24
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【Citations】
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3 DANGWen jia;School of Science,Xi′an Aeronautical University;;Study on the Rough Target′s Wavefront Distribution Characteristic in Optical Heterodyne Detection[J];西安航空学院学报;2016-03
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7 Zhang Yu~(1)2)+) Zhang Xiao-Juan~(1)) Fang Guang-You~(1)) 1)(Key Laboratory of Electromagnetic Radiation and Sensing Technology of CAS,The Institute of Electronic,Chinese Academy of Science, Beijing 100190,China) 2)(Graduated University of Chinese Academy of Science,Beijing 100190,China);Investigation on the characteristics of electromagnetic scattering from large-scale rough surface of layered medium[J];物理学报;2012-18
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9 LIU Xi-chuan~1,GAO Tai-chang~1,LIU Zhi-tian~(1,2) (1 Institute of Meteorology,PLA University of Science and Technology,Nanjing 211101,China; 2 Unit No.73653 of PLA,Quanzhou 362341,China);Effect of Atmospheric Aerosols on Laser Transmission Attenuation[J];大气与环境光学学报;2012-03
10 LUO Feixue1,2 DAI Wujiao1,2 Wu Xixiu1,2(1 Department of Surveying Engineering & Geo-Informatics,Central South University,932 South Lushan Road, Changsha 410083,China)(1 Key Laboratory of Precise Engineering Surveying & Deformation Disaster Monitoring of Hunan Province, 932 South Lushan Road,Changsha 410083,China);EMD Filtering Based on Cross-Validation and Its Application in GPS Multipath[J];武汉大学学报(信息科学版);2012-04
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