Open AccessSimple and robust ternary pulse‐encoding and reconstruction of narrowband RF signals over low‐cost fibre‐optic links
Author(s) -
Morgan Dennis R.
Publication year - 2017
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2017.0031
Subject(s) - narrowband , band pass filter , baseband , electronic engineering , optics , robustness (evolution) , avalanche photodiode , demodulation , detector , photodiode , materials science , computer science , physics , bandwidth (computing) , telecommunications , engineering , biochemistry , chemistry , channel (broadcasting) , gene
An existing ternary pulse‐coding scheme for bandpass signals, whereby a timing code specifies positive and negative rectangular pulses as well as a third zero state formed by skipping pulses, is adapted to transmission and reconstruction of narrowband RF signals over inexpensive fibre‐optic links. The main feature of this technique is that reconstruction of the narrowband analog signal is particularly simple, requiring only a bandpass filter. Simulations using a complex band‐limited Gaussian baseband input to represent a 20‐MHz LTE‐A signal establish the ideal theoretical performance, which is then compared to experimental results obtained by transmission on a 1.6‐GHz carrier over a fibre‐optic link consisting of an electro‐absorption modulated laser, 10 km of standard single‐mode fibre (SSMF), and avalanche photodiode detector. The experimental results are only slightly impaired from ideal performance, even for only 6 dB signal‐to‐noise ratio, thereby demonstrating the viability and robustness of the proposed technique.