Noise modeling by the trend of each range gate for coherent Doppler LIDAR

被引：16

作者：

Bu, Zhichao ^{[1
]}

Zhang, Yinchao ^{[1
]}

Chen, Siying ^{[1
]}

Guo, Pan ^{[1
]}

Li, Lu ^{[1
]}

Chen, He ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China

来源：

OPTICAL ENGINEERING | 2014年 / 53卷 / 06期

关键词：

coherent Doppler LIDAR; dual-balanced detector; noise modeling; wind speed distribution; polynomial fitting; PERFORMANCE;

D O I：

10.1117/1.OE.53.6.063109

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A denoising method of all-fiber pulsed coherent Doppler LIDAR (CDL) is investigated. The goal is to enhance the signal-to-noise ratio (SNR) in the weak signal regime. Based on differential detection theory, the total noise expression of CDL with a dual-balanced detector is introduced and analyzed. The conclusion is drawn that the total noise can be acquired under the local oscillator laser exposure conditions by reasonable simplification. Using the actual measured data, the ratio of the standard deviation to the mean value of the total noise in each range gate is obtained and is up to approximately 11%. In order to suppress the jitter of the noise, an effective noise modeling by the trend of each range gate is developed. The feasibility of this method is verified by a long set of measured data. The spatial and temporal distribution of wind speed is illustrated with 400 pulses accumulation. Compared to the noise modeling of the tail, the detection range of wind speed using the proposed method can be improved by 35.3%. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：6

共 17 条

[1] All-fiber Coherent Doppler LIDAR technologies at Mitsubishi Electric Corporation [J].

Ando, T. ;

Kameyama, S. ;

Hirano, Y. .

14TH INTERNATIONAL SYMPOSIUM FOR THE ADVANCEMENT OF BOUNDARY LAYER REMOTE SENSING, 2008, 1

[2]

Beyon J. Y., 2009, P SOC PHOTO-OPT INS, V7479

[3] Novel nonlinear adaptive Doppler-shift estimation technique for the coherent Doppler validation lidar [J].

Beyon, Jeffrey Y. ;

Koch, Grady J. .

OPTICAL ENGINEERING, 2007, 46 (01)

[4] Noise normalization and windowing functions for VALIDAR in wind parameter estimation [J].

Beyon, Jeffrey Y. ;

Koch, Grady J. ;

Li, Zhiwen .

LASER RADAR TECHNOLOGY AND APPLICATIONS XI, 2006, 6214

[5]

Frehlich R, 1996, J ATMOS OCEAN TECH, V13, P646, DOI 10.1175/1520-0426(1996)013<0646:SOCDLP>2.0.CO

[6]

[7]

Fujii T., 2005, LASER REMOTE SENSING

[8]

Hannon S. M., 1999, P 10 COH LAS RAD TEC, P20

[9] LASER DOPPLER DETECTION SYSTEMS FOR GAS VELOCITY MEASUREMENT [J].

HUFFAKER, RM .

APPLIED OPTICS, 1970, 9 (05) :1026-&

[10] Balanced photoreceivers for analog and digital fiber optic communications [J].

Joshi, A ;

Wang, XD ;

Mohr, D ;

Becker, D ;

Wree, C .

Enabling Photonics Technologies for Defense, Security, and Aerospace Applications, 2005, 5814 :39-50

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