PATENT CLAIM ANALYSIS

Application Number: 16438465
Application Type: Utility
Filing Date: 2019-06
Publication Date: 2019-09
Patent Classification: ["342", "02500F"]

Abstract:
The disclosure relates to a method and a system for terahertz ISAR imaging. In the method, a chirp signal is transmitted to an imaging target moving at a preset speed and a terahertz ISAR echo signal is received. The terahertz ISAR echo signal is matched filtered in a fast time domain, baseband transformed in a slow time domain, corrected to eliminate a time domain zero offset, baseband transformed, discretized, interpolated, and two-dimensional inverse Fourier transformed to obtain a two-dimensional image of the imaging target.

Claim (Index 9):
The system for terahertz ISAR imaging of  claim 8 , wherein the image processing unit further comprises:\n a reference signal generating module configured to generate a reference signal according to a hypothetical target reference position (X c ,Y c ); a matched filtering module configured to receive a reference signal s 0 (t) generated by the reference signal generating module, and use the reference signal s 0 (t) to perform a matched filtering in a fast time domain on the echo signal s r (t,u) to obtain a data matrix S M (\u03c9,u); a first baseband transform module configured to receive the data matrix S M (\u03c9,u), and perform a baseband transformation in a slow time domain on the data matrix S M (\u03c9,u) to obtain a baseband transformed data matrix S b (\u03c9,u) and a corresponding signal spectrum S b (\u03c9,k u ); a zero offset elimination module configured to receive the signal spectrum S b (\u03c9,k u ) obtained by the first baseband transform module, correct the signal spectrum S b (\u03c9,k u ) to eliminate a fast time domain zero offset, and obtain a corrected data matrix S(w,k u ), wherein S(\u03c9, k u )=S b (\u03c9,k u )exp(\u2212j\u03c9T c ); a second baseband transform module configured to receive the corrected data matrix S(w,k u ) from the zero offset elimination module, and use a phase function of the reference signal to perform another baseband transformation on the corrected data matrix S(w,k u ) to obtain a first target function F(k x , k y ); a difference module configured to receive the first target function F(k x ,k y ) obtained by the second baseband transform module, discretize the first target function F(k x ,k y ) to obtain F(k xmn ,k ymn ), and interpolate on a k xmn  domain to uniformly distribute the F(k xmn ,k ymn ) on the k xmn  domain; and a two-dimensional inverse Fourier transform module configured to receive the interpolated first target function obtained by the difference module, and perform a two-dimensional inverse Fourier transformation on the interpolated first target function to obtain a second target function \u0192(x n ,y n ), which is a two-dimensional image of the imaging target.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 100.0
- Lexical Diversity: 1.91837
- Patent Class: 342.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13860090', '12885179', '14150956', '13586331', '14641701']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5586380806998454
- 35 USC 102 Novelty (BERT): 0.4818346201649433
- Combined Prediction Score: 0.5509577346463553
- Mean Citation Score: 177.36236599999995
- Max Citation Score: 182.34822
- Similarity Product: 125.05690113554478

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test