Performance Analysis of Demodulation Algorithm for OcuSync Uplink Signals 


Vol. 51,  No. 3, pp. 610-620, Mar.  2026
10.7840/kics.2026.51.3.610


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  Abstract

This paper presents a signal processing scheme for detecting and demodulating the uplink signals of DJI drones’ OcuSync protocol from a third-party perspective. First, the specifications of the proprietary protocol were estimated, and based on these, a detection and demodulation algorithm was designed to successfully recover the uplink bitstream. Simulation results showed that the proposed algorithm achieved stable demodulation performance across all OcuSync versions. In particular, the BER converged to approximately 4×10⁻³ at SNRs above 16 dB, confirming that reliable demodulation is feasible even from a third-party perspective. Furthermore, ablation analysis demonstrated that omitting any individual stage of the algorithm led to significant performance degradation, highlighting that each stage is essential for achieving robust demodulation.

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  Cite this article

[IEEE Style]

H. Lee, J. Jung, J. Jeong, I. Sim, S. Yun, J. Seo, H. Nam, "Performance Analysis of Demodulation Algorithm for OcuSync Uplink Signals," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 3, pp. 610-620, 2026. DOI: 10.7840/kics.2026.51.3.610.

[ACM Style]

Hyungwoo Lee, Jaeyeon Jung, Jinwoo Jeong, Isaac Sim, Sangbom Yun, Junghyun Seo, and Haewoon Nam. 2026. Performance Analysis of Demodulation Algorithm for OcuSync Uplink Signals. The Journal of Korean Institute of Communications and Information Sciences, 51, 3, (2026), 610-620. DOI: 10.7840/kics.2026.51.3.610.

[KICS Style]

Hyungwoo Lee, Jaeyeon Jung, Jinwoo Jeong, Isaac Sim, Sangbom Yun, Junghyun Seo, Haewoon Nam, "Performance Analysis of Demodulation Algorithm for OcuSync Uplink Signals," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 3, pp. 610-620, 3. 2026. (https://doi.org/10.7840/kics.2026.51.3.610)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880