Channel Restoration Scheme to Improve Performance of Adaptive-Fast Frequency Hopping Remapping under Multiple Access Interference 


Vol. 51,  No. 1, pp. 232-240, Jan.  2026
10.7840/kics.2026.51.1.232


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  Abstract

In Non-Terrestrial Networks (NTNs) utilizing frequency hopping, adaptive-fast frequency hopping remapping (A-FFHR) is an anti-jamming technique that performs remapping to other available channels, excluding the jammed channel, when a jammed channel occurs[1]. The A-FFHR determines which channels are jammed by measuring the number of consecutive collisions a channel has, and ignores channels with collision count below the jamming threshold to avoid unnecessary remapping. However, in an environment with multiple access interference (MAI) due to overlapping UAV cells during a military operation, the number of collisions on a channel with MAI can also be above the jamming threshold. The A-FFHR mistakes this channel for a jamming channel and unnecessarily excludes available channels, and the reduced number of available channels further increases MAI, causing remapping, leading to the cascading pulse collision probability problem. To solve this problem, we propose a channel restoration scheme that utilizes guard time and idle slots to detect nonjamming channels among excluded channels and recover them to available channels. The performance of the proposed scheme is compared with the existing A-FFHR through simulation, and it is shown that the proposed scheme can effectively solve and reduce the problem of increasing the probability of cascading pulse collisions in A-FFHR.

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[IEEE Style]

E. Jo and H. Baek, "Channel Restoration Scheme to Improve Performance of Adaptive-Fast Frequency Hopping Remapping under Multiple Access Interference," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 1, pp. 232-240, 2026. DOI: 10.7840/kics.2026.51.1.232.

[ACM Style]

Eunjeong Jo and Hoki Baek. 2026. Channel Restoration Scheme to Improve Performance of Adaptive-Fast Frequency Hopping Remapping under Multiple Access Interference. The Journal of Korean Institute of Communications and Information Sciences, 51, 1, (2026), 232-240. DOI: 10.7840/kics.2026.51.1.232.

[KICS Style]

Eunjeong Jo and Hoki Baek, "Channel Restoration Scheme to Improve Performance of Adaptive-Fast Frequency Hopping Remapping under Multiple Access Interference," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 1, pp. 232-240, 1. 2026. (https://doi.org/10.7840/kics.2026.51.1.232)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880