A new reconfigurable intelligent-surface-assisted LoRa system
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 sys...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/163810 |
| _version_ | 1826110564360781824 |
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| author | Zhang, Xiaoyu Xu, Wenyang Cai, Guofa Song, Yang Chen, Guanrong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Zhang, Xiaoyu Xu, Wenyang Cai, Guofa Song, Yang Chen, Guanrong |
| author_sort | Zhang, Xiaoyu |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T02:36:31Z |
| format | Journal Article |
| id | ntu-10356/163810 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:36:31Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1638102022-12-19T02:32:59Z A new reconfigurable intelligent-surface-assisted LoRa system Zhang, Xiaoyu Xu, Wenyang Cai, Guofa Song, Yang Chen, Guanrong School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Bit Error Rate Reconfigurable Intelligent Surface 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. This work was supported in part by NSF of China under Grants 62071129 and 61801128, in part by the Hong Kong Research Grants Council under the GRF Grant CityU 11206320, and in part by the Project of Department of Education of Guangdong Province under Grant 2021XSLT020. 2022-12-19T02:32:59Z 2022-12-19T02:32:59Z 2022 Journal Article 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 0018-9545 https://hdl.handle.net/10356/163810 10.1109/TVT.2022.3173675 2-s2.0-85132527246 8 71 9055 9060 en IEEE Transactions on Vehicular Technology © 2022 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Bit Error Rate Reconfigurable Intelligent Surface Zhang, Xiaoyu Xu, Wenyang Cai, Guofa Song, Yang Chen, Guanrong A new reconfigurable intelligent-surface-assisted LoRa system |
| title | A new reconfigurable intelligent-surface-assisted LoRa system |
| title_full | A new reconfigurable intelligent-surface-assisted LoRa system |
| title_fullStr | A new reconfigurable intelligent-surface-assisted LoRa system |
| title_full_unstemmed | A new reconfigurable intelligent-surface-assisted LoRa system |
| title_short | A new reconfigurable intelligent-surface-assisted LoRa system |
| title_sort | new reconfigurable intelligent surface assisted lora system |
| topic | Engineering::Electrical and electronic engineering Bit Error Rate Reconfigurable Intelligent Surface |
| url | https://hdl.handle.net/10356/163810 |
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