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Sen. Netw."],"published-print":{"date-parts":[[2026,1,31]]},"abstract":"<jats:p>LoRa holds significant promise for marine monitoring and communication due to its advantages of long range, low power consumption, and low cost. However, in marine environments, its communication performance is severely degraded by the strong absorption of electromagnetic waves by seawater. To enhance the reliability of communication under weak channels in the marine environment, this article proposes FCLoRa, a LoRa receiver enhancement system for low signal-to-noise ratio (SNR) marine environments. FCLoRa adopts a dual-domain cooperative strategy between the transmitter and receiver. On the receiver side, it employs a multilevel accumulation scheme to detect packets by aggregating the energy of windowed symbol \u201cfragments\u201d and reconstructs complete signals by fusing weak, fragmented signals from multiple gateways. On the transmitter side, it builds a two-dimensional polarization fingerprint library based on antenna attitude sensing and dynamically adjusts the transmission direction to match the polarization characteristics of the base station, thereby minimizing signal loss. Experimental results show that FCLoRa achieves a packet detection rate of nearly 40% at an extremely low SNR of \u201335 dB, and improves the average SNR by 1.92 dB compared to conventional LoRa reception, demonstrating its practical value in extreme marine scenarios.<\/jats:p>","DOI":"10.1145\/3774326","type":"journal-article","created":{"date-parts":[[2025,10,31]],"date-time":"2025-10-31T06:23:17Z","timestamp":1761891797000},"page":"1-23","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["From Fragmentation to Correlation: Reliable LoRa Reception over Weak Marine Links"],"prefix":"10.1145","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-9434-2635","authenticated-orcid":false,"given":"Hui","family":"Liu","sequence":"first","affiliation":[{"name":"Faculty of Information Science and Engineering, Ocean University of China","place":["Qingdao, China"]}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8431-5388","authenticated-orcid":false,"given":"Penghao","family":"Wang","sequence":"additional","affiliation":[{"name":"Faculty of Information Science and Engineering, Ocean University of China","place":["Qingdao, China"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5123-7871","authenticated-orcid":false,"given":"Pengyu","family":"Wang","sequence":"additional","affiliation":[{"name":"Faculty of Information Science and Engineering, Ocean University of China","place":["Qingdao, China"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7560-7913","authenticated-orcid":false,"given":"Jingyang","family":"Hu","sequence":"additional","affiliation":[{"name":"University of Science and Technology of China","place":["Hefei, China"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7372-2539","authenticated-orcid":false,"given":"Hongbo","family":"Jiang","sequence":"additional","affiliation":[{"name":"College of Computer Science and Electronic Engineering, Hunan University","place":["Changsha, China"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7363-1987","authenticated-orcid":false,"given":"Chao","family":"Liu","sequence":"additional","affiliation":[{"name":"Faculty of Information Science and Engineering, Ocean University of China","place":["Qingdao, China"]}]}],"member":"320","published-online":{"date-parts":[[2026,1,7]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2017.1600613"},{"key":"e_1_3_1_3_2","unstructured":"Norbert Blenn and Fernando Kuipers. 2017. 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