Protection of information networks based on LoRa technology
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Date
2019-02-20
Journal Title
Journal ISSN
Volume Title
Publisher
CEUR-WS.org
Abstract
The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.
Description
The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.
Keywords
chirp, time-frequency Transform