On the Quasi-Orthogonality of LoRa Modulation

Article Computer Science, Information Systems

A Low-Complexity LoRa Synchronization Algorithm Robust to Sampling Time Offsets

Mathieu Xhonneux et al.

Summary: This article investigates the synchronization problem in LoRa receivers and proposes a low-complexity synchronization algorithm. The algorithm corrects carrier frequency and sampling time offsets based on a derived analytical model, and performance evaluations demonstrate its efficiency and low computational overhead in practical scenarios.

IEEE INTERNET OF THINGS JOURNAL (2022)

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Article Computer Science, Information Systems

Slope-Shift Keying LoRa-Based Modulation

Muhammad Hanif et al.

Summary: This article proposes a new modulation scheme called SSK-LoRa by adding a set of new orthonormal basis functions to the existing LoRa system to increase achievable data rate. Low-complexity optimum coherent and noncoherent detection algorithms are developed for SSK-LoRa modulation, with closed-form analytical and tight approximations for error probabilities in Rayleigh fading environment. The SSK-LoRa scheme is shown to outperform state-of-the-art LoRa-based modulation schemes.

IEEE INTERNET OF THINGS JOURNAL (2021)

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Article Computer Science, Information Systems

On the Advantage of Coherent LoRa Detection in the Presence of Interference

Orion Afisiadis et al.

Summary: The coherent detection of LoRa signals outperforms noncoherent detection in interference scenarios, providing larger gains. Theoretical derivations and simulation experiments demonstrate that coherent detection can also easily achieve accurate error rate values even under negative signal-to-interference ratio conditions.

IEEE INTERNET OF THINGS JOURNAL (2021)

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Article Engineering, Electrical & Electronic