The problems of joint adaptive waveform design and baseline range design for bistatic radar to maximize the practical radar resolution were considered.Distinguishing from the conventional ambiguity function(AF)-based ...The problems of joint adaptive waveform design and baseline range design for bistatic radar to maximize the practical radar resolution were considered.Distinguishing from the conventional ambiguity function(AF)-based resolution which is only related with the transmitted waveform and bistatic geometry and could be regarded as the potential resolution of a bistatic radar system,the practical resolution involves the effect of waveform,signal-to-noise ratio(SNR)as well as the measurement model.Thus,it is more practical and will have further significant application in target detection and tracking.The constraint optimization procedure of joint adaptive waveform design and baseline range design for maximizing the practical resolution of bistatic radar system under dynamic target scenario was devised.Simulation results show that the range and velocity resolution are enhanced according to the adaptive waveform and bistatic radar configuration.展开更多
A new kind of lidar signal light-splitting system is presented to sum up different rotational Raman lines and to improve the signal to noise ratio(SNR) .The temperature parameters with high SNR of this new system have...A new kind of lidar signal light-splitting system is presented to sum up different rotational Raman lines and to improve the signal to noise ratio(SNR) .The temperature parameters with high SNR of this new system have been obtained with a normal laser and a small telescope from several kilometers.展开更多
The primary goal of this work is to characterize the impact of weighting selection strategy and multistatic geometry on the multistatic radar performance. With the relationship between the multistatic ambiguity functi...The primary goal of this work is to characterize the impact of weighting selection strategy and multistatic geometry on the multistatic radar performance. With the relationship between the multistatic ambiguity function （AF） and the multistatie Cram6r-Rao lower bound （CRLB）, the problem of calculating the multistatic AF and the multistatic CRLB as a performance metric for multistatic radar system is studied. Exactly, based on the proper selection of the system parameters, the multistatic radar performance can be significantly improved. The simulation results illustrate that the multistatic AF and the multistatic CRLB can serve as guidelines for future multistatic fusion rule development and multistatic radars deployment.展开更多
Synthetic aperture imaging lidar is an active new imaging system, which can offer a finer azimuth resolution than the SAR system. An indoor system of synthetic aperture imaging lidar is given, which is a demonstration...Synthetic aperture imaging lidar is an active new imaging system, which can offer a finer azimuth resolution than the SAR system. An indoor system of synthetic aperture imaging lidar is given, which is a demonstration about synthetic aperture to image rotating objects. Firstly, the basic principle is introduced. Then, the basic method and key techniques are analyzed. After that an improved system is given with the transmitting and the receiving lens apart from each other which can eliminate the interference efficiently. Finally, the block diagram and the result of imaging system are given, which prove the validity of the system and the feasibility of the synthetic aperture techniques in optical domain.展开更多
The first images obtained from Gaofen-3（GF-3）,China’s first C-band high-resolution Synthetic Aperture Radar（SAR）satellite with a resolution of one meter in spatial diameter were published on August 25.This satell...The first images obtained from Gaofen-3（GF-3）,China’s first C-band high-resolution Synthetic Aperture Radar（SAR）satellite with a resolution of one meter in spatial diameter were published on August 25.This satellite undertakes an important task with its all-day,all-weather observation capability as part of the China High-resolution Earth Observation System（CHEOS）.With 12 imaging modes,展开更多
基金Project supported by the Program for New Century Excellent Talents in University,ChinaProject(61171133)supported by the National Natural Science Foundation of China+2 种基金Project(11JJ1010)supported by the Natural Science Fund for Distinguished Young Scholars of Hunan Province,ChinaProject(61101182)supported by the National Natural Science Foundation for Young Scientists of ChinaProject(20124307110013)supported by the Doctoral Program of Higher Education of China
文摘The problems of joint adaptive waveform design and baseline range design for bistatic radar to maximize the practical radar resolution were considered.Distinguishing from the conventional ambiguity function(AF)-based resolution which is only related with the transmitted waveform and bistatic geometry and could be regarded as the potential resolution of a bistatic radar system,the practical resolution involves the effect of waveform,signal-to-noise ratio(SNR)as well as the measurement model.Thus,it is more practical and will have further significant application in target detection and tracking.The constraint optimization procedure of joint adaptive waveform design and baseline range design for maximizing the practical resolution of bistatic radar system under dynamic target scenario was devised.Simulation results show that the range and velocity resolution are enhanced according to the adaptive waveform and bistatic radar configuration.
文摘A new kind of lidar signal light-splitting system is presented to sum up different rotational Raman lines and to improve the signal to noise ratio(SNR) .The temperature parameters with high SNR of this new system have been obtained with a normal laser and a small telescope from several kilometers.
基金Project(61271441)supported by the National Natural Science Foundation of ChinaProject(NCET-10-0895)supported by the Program for New Century Excellent Talents in Universities of China
文摘The primary goal of this work is to characterize the impact of weighting selection strategy and multistatic geometry on the multistatic radar performance. With the relationship between the multistatic ambiguity function （AF） and the multistatie Cram6r-Rao lower bound （CRLB）, the problem of calculating the multistatic AF and the multistatic CRLB as a performance metric for multistatic radar system is studied. Exactly, based on the proper selection of the system parameters, the multistatic radar performance can be significantly improved. The simulation results illustrate that the multistatic AF and the multistatic CRLB can serve as guidelines for future multistatic fusion rule development and multistatic radars deployment.
基金Supported by the National High Technology Research and Development Program of China ("863" Program, No.2006AA12Z144)
文摘Synthetic aperture imaging lidar is an active new imaging system, which can offer a finer azimuth resolution than the SAR system. An indoor system of synthetic aperture imaging lidar is given, which is a demonstration about synthetic aperture to image rotating objects. Firstly, the basic principle is introduced. Then, the basic method and key techniques are analyzed. After that an improved system is given with the transmitting and the receiving lens apart from each other which can eliminate the interference efficiently. Finally, the block diagram and the result of imaging system are given, which prove the validity of the system and the feasibility of the synthetic aperture techniques in optical domain.
文摘The first images obtained from Gaofen-3（GF-3）,China’s first C-band high-resolution Synthetic Aperture Radar（SAR）satellite with a resolution of one meter in spatial diameter were published on August 25.This satellite undertakes an important task with its all-day,all-weather observation capability as part of the China High-resolution Earth Observation System（CHEOS）.With 12 imaging modes,
