Super-Resolution Imaging Using Very Deep Convolutional Network in Terahertz NDT Field

Estimation of High-Frequency Vibration Parameters for Airborne Terahertz SAR Using Chirplet Decomposition and LS Sequential Estimators

“…SRT is a technique to simplify the maximum likelihood estimation problem by reducing the number of parameters in regression problems. In regression analysis, for an objective function l(x) with q independent variables, we define (1) , x (2) x…”

“…Assume that x(2) x (1) is the maximum likelihood value of x (2) when x (1) is fixed. x(2) can be derived from ∂l(x)…”

“…Since their frequency falls between that of microwaves and infrared waves, THz waves share many characteristics with microwaves and infrared rays, including penetrability, high resolution, safety, and material identification. This has led to the widespread application of THz radar technology [1][2][3]. Especially, synthetic aperture radar (SAR) operating in the THz band has become one of the important research directions in the field of radar imaging [4,5].…”

“…Compared with conventional SAR operating in microwaves bands, THz-SAR offers high imaging resolution, good penetrability, and high frame rate imaging capability, giving it potential applications in many fields, such as video SAR, security checks, indoor object recognition, detecting micro-motion targets and stealth targets, etc. [1][2][3][4][5][6].…”