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|Title:||A new reconfigurable intelligent-surface-assisted LoRa system||Authors:||Zhang, Xiaoyu
|Keywords:||Engineering::Electrical and electronic engineering||Issue Date:||2022||Source:||Zhang, X., Xu, W., Cai, G., Song, Y. & Chen, G. (2022). A new reconfigurable intelligent-surface-assisted LoRa system. IEEE Transactions On Vehicular Technology, 71(8), 9055-9060. https://dx.doi.org/10.1109/TVT.2022.3173675||Journal:||IEEE Transactions on Vehicular Technology||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 log2M 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.||URI:||https://hdl.handle.net/10356/163810||ISSN:||0018-9545||DOI:||10.1109/TVT.2022.3173675||Rights:||© 2022 IEEE. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||EEE Journal Articles|
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