TY - GEN
T1 - Weak signal detection system and noise analysis for aerosol detection lidar
AU - Qiu, Zong Jia
AU - Chen, Si Ying
AU - Zhang, Yin Chao
AU - Wang, Yu Zhao
AU - Ni, Guo Qiang
PY - 2009
Y1 - 2009
N2 - The information of location and scattering intensity of the target can be detected by lidar system. The physical characteristics of the target can be retrieved from the scattering intensity. Since the corresponding relationship between the echo signal intensity and the detection range requires to be measured accurately, a weak signal detection system of lidar is needed, with strong electromagnetic immunity, high sensitivity and wide dynamic range. In this paper, firstly, various characteristics of echo signals obtained by aerosol detection lidar, including the signal intensity and frequency spectrum are analyzed. Secondly, the influencing factors associated with those signal characteristics, such as photoelectric detector response time and the dynamic range, are also described. At last, a signal-to-noise ratio model for lidar is established. The influencing factors of the photomultiplier tube shot noise, dark current noise, and background radiation noise to the final SNR can be assessed. Meanwhile, some effective ways to reduce the interference noise are discussed.
AB - The information of location and scattering intensity of the target can be detected by lidar system. The physical characteristics of the target can be retrieved from the scattering intensity. Since the corresponding relationship between the echo signal intensity and the detection range requires to be measured accurately, a weak signal detection system of lidar is needed, with strong electromagnetic immunity, high sensitivity and wide dynamic range. In this paper, firstly, various characteristics of echo signals obtained by aerosol detection lidar, including the signal intensity and frequency spectrum are analyzed. Secondly, the influencing factors associated with those signal characteristics, such as photoelectric detector response time and the dynamic range, are also described. At last, a signal-to-noise ratio model for lidar is established. The influencing factors of the photomultiplier tube shot noise, dark current noise, and background radiation noise to the final SNR can be assessed. Meanwhile, some effective ways to reduce the interference noise are discussed.
KW - Aerosol lidar
KW - Noise analysis
KW - Photomultiplier tube
KW - Weak signal detection
UR - http://www.scopus.com/inward/record.url?scp=70450221062&partnerID=8YFLogxK
U2 - 10.1117/12.836669
DO - 10.1117/12.836669
M3 - Conference contribution
AN - SCOPUS:70450221062
SN - 9780819476630
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - International Symposium on Photoelectronic Detection and Imaging 2009
T2 - International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Y2 - 17 June 2009 through 19 June 2009
ER -