Hybrid Chirp Signal Design for Improved Long-Range (LoRa) Communications
Abstract
:1. Introduction
- A joint up- and down-chirp-based modulation scheme which is more resilient against noise/interference is proposed;
- A hybrid demodulation scheme to enhance demodulation performance is proposed;
- The proposed techniques are validated through simulations for different scenarios.
2. Related Work
3. Preliminaries
3.1. LoRa Modulation
3.2. LoRa Demodulation
4. Proposed Modulation Scheme
4.1. FFT-Based Demodulation
4.2. Hybrid Demodulation
Algorithm 1 Hybrid Demodulation Technique |
|
5. Numerical Results and Discussion
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value |
---|---|
Packet size | 200 Bits |
Bandwidth | 125 kHz |
Packet error rate threshold | 0.01 |
Carrier frequency | 915 MHz |
Transmit power | 2 dBm |
Noise figure | 10 dBm |
Sp. Fac | ||||||||
---|---|---|---|---|---|---|---|---|
Schemes | ||||||||
Traditional | −3 | −6 | −9 | −12 | −15 | −19 | −22 | |
Proposed (FFT) | −6 | −11 | −13 | −16 | −19 | −22 | −25 | |
Proposed (Hybrid) | −8 | −11 | −14 | −17 | −19 | −22 | −26 |
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Noor-A-Rahim, M.; Khyam, M.O.; Mahmud, A.; Li, X.; Pesch, D.; Poor, H.V. Hybrid Chirp Signal Design for Improved Long-Range (LoRa) Communications. Signals 2022, 3, 1-10. https://doi.org/10.3390/signals3010001
Noor-A-Rahim M, Khyam MO, Mahmud A, Li X, Pesch D, Poor HV. Hybrid Chirp Signal Design for Improved Long-Range (LoRa) Communications. Signals. 2022; 3(1):1-10. https://doi.org/10.3390/signals3010001
Chicago/Turabian StyleNoor-A-Rahim, Md., M. Omar Khyam, Apel Mahmud, Xinde Li, Dirk Pesch, and H. Vincent Poor. 2022. "Hybrid Chirp Signal Design for Improved Long-Range (LoRa) Communications" Signals 3, no. 1: 1-10. https://doi.org/10.3390/signals3010001