A Novel Multi-Slope Chirp Modulation and Demodulation with Instantaneous Chirp Rate Estimation

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dc.contributor.authorMagkeethum, Apiwat
dc.contributor.authorSaechia, Sukkharak
dc.contributor.authorWardkein, Paramote
dc.date.accessioned2026-08-06T10:55:24Z
dc.date.available2026-08-06T10:55:24Z
dc.date.issued2026-05-01
dc.description.abstractThe growth of Internet of Things (IoT) applications is driving demand for Low-Power Wide-Area Networks (LPWANs) to support higher data rates with the same energy efficiency. While Long Range (LoRa) provides excellent noise immunity and receiver sensitivity, its data rate might be insufficient for some applications, including those real-time applications in which LoRa is required to have infrequent transmissions to maintain low power consumption. In this paper, a novel modulation is introduced to address these limitations by utilizing narrowband chirp to represent a data symbol with chirp slopes, called a multi-slope chirp signal. At the receiver, a new blind non-coherent detection technique is also presented to recover the proposed signal. The simulation results confirm that the proposed scheme can successfully transmit information at 2 to 4 bits per symbol, and when compared to LoRa SF 6, it reduces the Time-on-Air (ToA) by half and also achieves an improvement in spectral efficiency in the frequency domain.
dc.identifier.citationSensors, 26(9), 2026
dc.identifier.doi10.3390/s26092603
dc.identifier.issn14248220
dc.identifier.other2-s2.0-105038399920
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/18070
dc.sourceSensors
dc.subjectchirp modulation and demodulation
dc.subjectchirp spread spectrum
dc.subjectLoRa
dc.subjectLPWANs
dc.subjectnon-coherent detection
dc.titleA Novel Multi-Slope Chirp Modulation and Demodulation with Instantaneous Chirp Rate Estimation
dc.typeArticle

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