J Navig Port Res > Volume 48(6); 2024 > Article
Journal of Navigation and Port Research 2024;48(6):441-447.
DOI: https://doi.org/10.5394/KINPR.2024.48.6.441    Published online December 31, 2024.
해상 무선 통신에서 결정 피드백을 이용한 시퀀스 등화 방법에 대한 연구
송경희1, 지민기2, 박정철4, 정성윤3
1위즈노바 엔지니어
2위즈노바 엔지니어
3지텔글로벌 엔지니어
4지텔글로벌 엔지니어
Decision Feedback Sequence Equalization for Maritime Wireless Communication
Kyounghee Song1, Minki Jee2, Jeongcheol Park4, Seungyun Jung3
1Engineer, Wiznova, Seongnam 13426, Korea
2Engineer, Wiznova, Seongnam 13426, Korea
3Engineer, Jitelglobal, Uiwang, 16006, Korea
4Engineer, Jitelglobal, Uiwang, 16006, Korea
Correspondence:  Jeongcheol Park, Tel: 031)608-8197, 
Email: jcpark@jitelglobal.com
Received: 15 December 2023   • Revised: 22 December 2023   • Accepted: 4 September 2024
Abstract
The long-distance maritime wireless communication may fail due to signal multipath between the transmitter and receiver. To mitigate data reception failures, channel equalization techniques can be employed at the receiver. We propose a sequence equalization method implemented using the Viterbi algorithm. Decision feedback is utilized in the equalization process to reduce the number of trellis states, and signal grouping is employed to lower the number of trellis transition branches. Computer simulations have been conducted for the signal reception of 16-QAM at a 76.8 kHz symbol rate through a two-way channel model with delays of 10 µsec and 30 µsec. The results demonstrate no error flow due to the examined channel multipath.
Key Words: maritime wireless communication, channel equalization, decision feedback equalizer, frequency domain equalization, VHF Data Exchange System(VDES)


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