한반도 천해역에서 수중 OFDM 통신을 위한 프리앰블 성능 분석
Performance Analysis of Preambles for Underwater OFDM communication in Shallow Waters of the Korean Peninsula
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초록
본 논문에서는 한반도의 동해, 서해, 남해 천해역에서 수중 직교 주파수 분할 다중화(OFDM) 방식을 적용했을 때, Zadoff-Chu sequence(ZCS), 선형 변조 신호(Linear Frequency Modulation, LFM)+ZCS, 쌍곡 변조 신호(Hyperbolic Frequency Modulation, HFM)+ZCS의 프리앰블 구조에 따른 시간 동기화 성능, 반송파 주파수 오프셋(Carrier Frequency Offset, CFO) 추정 성능, 및 비트 오류율(Bit Error Rate, BER)을 비교 분석했다. 전산 모의 실험 결과, 동해 12월과 남해 8월에서는 ZCS가 가장 우수한 시간 동기화 성능을 보였으며, 나머지 해역과 계절에서는 LFM+ZCS가 좋은 성능을 보였다. 또한, 시간 동기화 성능 순서와 동일한 CFO 추정 성능과 BER 성능을 보였다.
Abstract
This paper analyzes the performance of underwater orthogonal frequency division multiplexing (OFDM) communication methods in the shallow waters of the East Sea, Yellow Sea, and South Sea of Korea. It analyzes the time synchronization performance, carrier frequency offset (CFO) estimation, and bit error rate (BER) based on the preamble structures of Zadoff-Chu sequence (ZCS), Linear Frequency Modulation (LFM)+ZCS, and Hyperbolic Frequency Modulation (HFM)+ZCS. The simulation results showed that ZCS performed best for time synchronization in December in the East Sea and in August in the South Sea, while LFM+ZCS performed well in other regions and seasons. The performance for CFO estimation and BER followed a similar pattern to the time synchronization performance.
참고문헌 (10)
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