The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Terahertz radar coded-aperture imaging technology can achieve high-resolution, forward-looking and staring imaging by producing spatiotemporal independent signals in the imaging area. Sparse reconstruction algorithm is efficient in the point target imaging, whereas it becomes invalid for complex area targets. This paper proposes a method combining wavelet transform and orthogonal matching pursuit...
High frequency vibration of the platform or the targets is an inevitable problem in the field of radar imaging, and it has significant effects on the image quality, especially in the terahertz band. In this paper, a compensation method for high frequency vibration based on dominant scatterers is proposed. The essence of this method is estimation and compensation of the high frequency vibration by...
Terahertz radar coded-aperture imaging technology based on fast scanning and random phase modulation can achieve high-resolution, forward-looking and staring imaging. Fast scanning with phase controlled needs accurate phase control, while random phase modulation would probably damage its accuracy. To verify the feasibility of simultaneous operation on the two function, this paper deduce the mathematical...
In this paper, a 0.32 THz imaging radar system was built and experiment on a precession warhead model is presented. The imaging algorithm based on range-instantaneous Doppler algorithm is adopted and high resolution ISAR imaging results are obtained. From these imaging results, we can easily recognize structures and even the subtle structures of the precession target, which verify the advantages of...
The random phase errors existing in the terahertz (THz) radar system, usually lead to the range profile broadened and defocused, which should be compensated. In this paper, a compensation method based on Bayesian compressive sensing (BCS) is proposed. Firstly, the reconstruction model containing the random phase errors is established. Subsequently, the phase errors is obtained using the maximum likelihood...
Micro-Doppler is induced by the micro- motion of target and serves as an important characteristic for target recognition once extracted via parameter estimation, but it is generally too significant to result in aliasing in terahertz band. To solve this problem, we analyze the theoretical model and characteristics of aliased micro-Doppler and propose a Doppler aliasing free micro-motion parameter estimation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.