A New Reconfigurable Intelligent-Surface-Assisted LoRa System

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

6 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)9055-9060
Journal / PublicationIEEE Transactions on Vehicular Technology
Volume71
Issue number8
Online published10 May 2022
Publication statusPublished - Aug 2022

Abstract

Although LoRa modulation can achieve low-power and long-range transmission, its performance is significantly affected by fading channels. On the other hand, its low data rate limits the capacity. To mitigate these disadvantages, a new reconfigurable intelligent surface (RIS) assisted LoRa uplink system is proposed in this paper, where the reflection coefficients of the RIS are generated by utilizing an M-ary differential phase shift keying modulator. Moreover, a low-complexity non-coherent receiver is designed for the proposed system. The new system is able to inherit the non-coherent detection of the conventional LoRa system and also transmit additional information of log2 M bits while reducing the impact of the fading channels. Furthermore, the bit-error-rate, symbol-error-rate and throughput expressions of the system are derived in closed form. Theoretical and simulated results show that the system has better performance than the conventional LoRa system and single-relay LoRa system.

Research Area(s)

  • bit error rate, Channel estimation, Demodulation, Fading channels, LoRa modulation, M DPSK, Modulation, Receivers, reconfigurable intelligent surface (RIS), symbol error rate, Symbols, throughput, Transmitters

Citation Format(s)

A New Reconfigurable Intelligent-Surface-Assisted LoRa System. / Zhang, Xiaoyu; Xu, Wenyang; Cai, Guofa et al.
In: IEEE Transactions on Vehicular Technology, Vol. 71, No. 8, 08.2022, p. 9055-9060.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review