Open AccessExperimental evaluation of an OFDM-PWM-based X-ray communication system
Author(s) -
Wenxuan Chen,
Yunpeng Liu,
Xiaobin Tang,
J. Mu,
Soon Onn Lai
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.415291
Subject(s) - orthogonal frequency division multiplexing , bit error rate , optics , pulse width modulation , modulation (music) , physics , noise (video) , channel (broadcasting) , multiplexing , computer science , electronic engineering , voltage , telecommunications , acoustics , engineering , quantum mechanics , artificial intelligence , image (mathematics)
We experimentally demonstrate an improved orthogonal frequency division multiplexing (OFDM) into the pulse width modulation (PWM) scheme for the X-ray communication (XCOM). The scheme is insensitive to the nonlinearity of the grid-controlled X-ray tube with switching 'on' and 'off' between two points. The dependence of this system's bit-error-rate (BER) performances on the data rates and the working parameters including the anode voltage and filament current of the grid-controlled X-ray tube are studied. The OFDM-PWM scheme reaches the data rate of 360 kbps at a BER of the forward error correction threshold of 3.8 × 10 -3 over a 5 cm air channel. In addition, an experiment aided by density-based spatial clustering of applications with noise nonlinear compensation is carried out, and the results demonstrate the improvements in Q-factor by 0.62 dB.