A Novel Scheme for Discrete and Secure LoRa Communications.

Area of Science:

• Wireless Communication
• Signal Processing
• Cybersecurity

Background:

• Ensuring secure discrete communications is crucial in wireless networks.
• Existing LoRa (Long Range) systems may be vulnerable to eavesdropping.
• Spread spectrum techniques offer a robust method for enhancing signal security.

Purpose of the Study:

• To develop a novel LoRa transceiver scheme for secure discrete communications.
• To enhance existing LoRa synchronization front-ends for improved security.
• To introduce a new payload demodulation method to overcome limitations of traditional approaches.

Main Methods:

• Modification of preamble and payload waveforms in a LoRa transceiver.
• Adaptation of a state-of-the-art LoRa synchronization front-end.
• Implementation of a self-jamming approach for enhanced security.
• Development of a new payload demodulation technique avoiding cross-correlation issues.

Main Results:

• The proposed self-jamming scheme demonstrates robust security against eavesdropping.
• Simulation results show very good symbol error rate (SER) performance.
• A minimal performance loss of only 0.5 dB was observed for a frequency spread factor up to 10.

Conclusions:

• The new LoRa transceiver scheme effectively secures discrete communications.
• The self-jamming approach provides a viable and efficient security enhancement.
• The developed demodulation method offers an improvement over traditional cross-correlation techniques.