A 1-GHz 64-Channel Cross-Correlation System for Real-Time Interferometric Aperture Synthesis Imaging.
Analog-Digital Conversion
Gun Violence
/ prevention & control
Human Body
Humans
Image Enhancement
/ methods
Image Interpretation, Computer-Assisted
/ methods
Interferometry
/ methods
Models, Theoretical
Phantoms, Imaging
Security Measures
/ trends
Signal Processing, Computer-Assisted
/ instrumentation
1-bit
FPGA
aperture synthesis
comparator
cross correlator
interferometry
security screening
Journal
Sensors (Basel, Switzerland)
ISSN: 1424-8220
Titre abrégé: Sensors (Basel)
Pays: Switzerland
ID NLM: 101204366
Informations de publication
Date de publication:
11 Apr 2019
11 Apr 2019
Historique:
received:
08
03
2019
revised:
04
04
2019
accepted:
06
04
2019
entrez:
14
4
2019
pubmed:
14
4
2019
medline:
10
8
2019
Statut:
epublish
Résumé
We present a 64-channel 1-bit/2-level cross-correlation system for a passive millimeter wave imager used for indoor human body security screening. Sixty-four commercial comparators are used to perform 1-bit analog-to-digital conversion, and a Field Programmable Gate Array (FPGA) is used to perform the cross-correlation processing. This system can handle 2016 cross-correlations at the sample frequency of 1GHz, and its power consumption is 48.75 W. The data readout interface makes it possible to read earlier data while simultaneously performing the next correlation when imaging at video rate. The longest integration time is up to 68.7 s, which can satisfy the requirements of video rate imaging and system calibration. The measured crosstalk between neighboring channels is less than 0.068%, and the stability is longer than 10 s. A correlation efficiency greater than 96% is achieved for input signal levels greater than -25 dBm.
Identifiants
pubmed: 30978993
pii: s19071739
doi: 10.3390/s19071739
pmc: PMC6480425
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : Ministry of Science and Technology of the People's Republic of China
ID : 2016YFC0800401
Références
Sensors (Basel). 2018 Apr 17;18(4):null
pubmed: 29673209