Noncoherent Maximum Likelihood Detection for LoRa Signals in Multipath Fading
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866918448392568832 |
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| author | Nguyen, The Khai Bedeer, Ebrahim Barton, Robert |
| author_facet | Nguyen, The Khai Bedeer, Ebrahim Barton, Robert |
| contents | This letter derives the noncoherent (NC) maximum likelihood (ML) detection rule for LoRa signals under Rician multi-path fading channel. The proposed NC-ML detection only requires the channel statistic, not the actual instantaneous channel state information (CSI), which eliminates the overhead associated with channel estimation. Simulation results show that despite the low-complexity, the proposed detection scheme significantly improves the performance of LoRa detection over multipath channel. Notably, in time-invariant channel, the NCML receiver can achieve an equivalently good performance as compared to existing coherent schemes, and even surpasses them when Doppler shift is present, while not relying on the channel estimation nor reference signal extracted from the preamble. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_13778 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Noncoherent Maximum Likelihood Detection for LoRa Signals in Multipath Fading Nguyen, The Khai Bedeer, Ebrahim Barton, Robert Signal Processing This letter derives the noncoherent (NC) maximum likelihood (ML) detection rule for LoRa signals under Rician multi-path fading channel. The proposed NC-ML detection only requires the channel statistic, not the actual instantaneous channel state information (CSI), which eliminates the overhead associated with channel estimation. Simulation results show that despite the low-complexity, the proposed detection scheme significantly improves the performance of LoRa detection over multipath channel. Notably, in time-invariant channel, the NCML receiver can achieve an equivalently good performance as compared to existing coherent schemes, and even surpasses them when Doppler shift is present, while not relying on the channel estimation nor reference signal extracted from the preamble. |
| title | Noncoherent Maximum Likelihood Detection for LoRa Signals in Multipath Fading |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2604.13778 |