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Signals, Volume 3, Issue 1

2022 March - 10 articles

Cover Story: Long-range (LoRa) communication has attracted much attention recently due to its utility for many Internet of Things applications, such as satellite-based, long-range communications. However, one of the key problems of LoRa technology is that it is vulnerable to noise/interference due to the use of only up-chirp signals during modulation. In this paper, to solve this problem, unlike the conventional LoRa modulation scheme, we propose a modulation scheme for LoRa communication based on joint up- and down-chirps. We have shown that LoRa communication range can be extended significantly through our proposed scheme. View this paper
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Articles (10)

  • Article
  • Open Access
8 Citations
10,263 Views
11 Pages

15 March 2022

Several parameter tables for PID controllers are known from the literature, for the control of time-delayed systems. The best known is that of Ziegler and Nichols, but there are others also. In this publication, a parameter table is presented that mi...

  • Article
  • Open Access
61 Citations
23,794 Views
33 Pages

Smart Clothing Framework for Health Monitoring Applications

  • Mominul Ahsan,
  • Siew Hon Teay,
  • Abu Sadat Muhammad Sayem and
  • Alhussein Albarbar

2 March 2022

Wearable technologies are making a significant impact on people’s way of living thanks to the advancements in mobile communication, internet of things (IoT), big data and artificial intelligence. Conventional wearable technologies present many...

  • Article
  • Open Access
11 Citations
4,968 Views
18 Pages

A Novel Intelligent IoT System for Improving the Safety and Planning of Air Cargo Operations

  • Christos Spandonidis,
  • Elias Sedikos,
  • Fotis Giannopoulos,
  • Areti Petsa,
  • Panayiotis Theodoropoulos,
  • Kostas Chatzis and
  • Nektarios Galiatsatos

1 March 2022

Being the main pillar in the context of Industry 4.0, the Internet of Things (IoT) leads evolution towards a smarter and safer planet. Being human-centered, rather than machine-centered, as was the case of wireless sensor networks used in the industr...

  • Technical Note
  • Open Access
2 Citations
4,378 Views
9 Pages

16 February 2022

The use of lightweight cryptographic algorithms is essential for addressing security in highly constrained environments such as the Internet of Things. In this paper, the performance of lightweight block ciphers in such highly constrained environment...

  • Article
  • Open Access
2 Citations
3,676 Views
20 Pages

3 February 2022

Most environments change over time. Being able to adapt to such non-stationary environments is vital for real-world applications of many machine learning algorithms. In this work, we propose CORAL, a computationally efficient regression algorithm cap...

  • Systematic Review
  • Open Access
11 Citations
7,149 Views
26 Pages

Mobile Applications for Epilepsy: Where Are We? Where Should We Go? A Systematic Review

  • Mariana Abreu,
  • Ana Sofia Carmo,
  • Ana Franco,
  • Sara Parreira,
  • Beatriz Vidal,
  • Mariana Costa,
  • Ana Rita Peralta,
  • Hugo Plácido da Silva,
  • Carla Bentes and
  • Ana Fred

3 February 2022

The development of mobile health for epilepsy has grown in the last years, bringing new applications (apps) to the market and improving already existing ones. In this systematic review, we analyse the scope of mobile apps for seizure detection and ep...

  • Article
  • Open Access
22 Citations
5,828 Views
18 Pages

Wearable Device for Observation of Physical Activity with the Purpose of Patient Monitoring Due to COVID-19

  • Angelos-Christos Daskalos,
  • Panayiotis Theodoropoulos,
  • Christos Spandonidis and
  • Nick Vordos

6 January 2022

In late 2019, a new genre of coronavirus (COVID-19) was first identified in humans in Wuhan, China. In addition to this, COVID-19 spreads through droplets, so quarantine is necessary to halt the spread and to recover physically. This modern urgency c...

  • Article
  • Open Access
10 Citations
5,624 Views
10 Pages

Hybrid Chirp Signal Design for Improved Long-Range (LoRa) Communications

  • Md. Noor-A-Rahim,
  • M. Omar Khyam,
  • Apel Mahmud,
  • Xinde Li,
  • Dirk Pesch and
  • H. Vincent Poor

5 January 2022

Long-range (LoRa) communication has attracted much attention recently due to its utility for many Internet of Things applications. However, one of the key problems of LoRa technology is that it is vulnerable to noise/interference due to the use of on...

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Signals - ISSN 2624-6120