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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국정보통신학회JICCE Journal of information and communication convergence engineering Journal of information and communication convergence engineering Vol.14 No.2
- 발행연도
- 2016.6
- 수록면
- 78 - 83 (6page)
이용수
초록· 키워드
오류제보하기
In underwater acoustic communication, the transmitted signals are severely influenced by the reflections from both the sea surface and the sea bottom. As very large reflection signals from these boundaries cause an inter-symbol interference (ISI) effect, the communication quality worsens. A channel estimation-based equalizer is usually adopted to compensate for the reflected signals under the acoustic communication channel. In this study, a feed-forward equalizer (FFE) with the least mean squares (LMS) algorithm was applied to a quadrature phase-shift keying (QPSK) transmission system. Two different types of equalizers were adopted in the QPSK system, namely a real-coefficient equalizer and a complex-coefficient equalizer. The performance of the complex-coefficient equalizer was better than that of two real-coefficient equalizers. Therefore, a Hilbert transform was applied to the real-coefficient binary phase-shift keying (BPSK) system to obtain a complex-coefficient BPSK system. Consequently, we obtained better results than those of a real-coefficient equalizer.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. COMPARISON OF TWO TYPES OF EQUALIZERS
Ⅲ. SIMULATION CONFIGURATIONS
Ⅳ. CONCEPT OF COMPLEX BPSK SYSTEM
Ⅴ. RESULTS AND DISCUSSIONS
Ⅵ. CONCLUSIONS
REFERENCES
참고문헌 (11)
참고문헌 신청
[학술지(정기간행물)] - T. C. Yang / 2012 / Properties of underwater acoustic communication channels in shallow water / Journal of the Acoustical Society of America 131 (1) : 129 ~ 145
[학술대회논문] - T. B. Aik / 2006 / Characterization of multipath acoustic channels in very shallow waters for communications / Proceeding of OCEANS 2006 – Asia Pacific : 1 ~ 8
[학술지(정기간행물)] - W. B. Yang / 2006 / High-frequency channel characterization for M-ary frequency-shift-keying underwater acoustic communications / Journal of the Acoustical Society of America 120 (5) : 2615 ~ 2626
[학술지(정기간행물)] - J. Park / 2009 / Frequency and temporal coherence variation for sea surface fluctuation / Japanese Journal of Applied Physics 48 (7S)
[학술지(정기간행물)] - J. Park / 2010 / Underwater acoustic communication channel simulator for flat fading / Japanese Journal of Applied Physics 49 (7S)
[학술대회논문] - T. B. Aik / 2006 / Characterization of multipath acoustic channels in very shallow waters for communications / Proceeding of OCEANS 2006 – Asia Pacific : 1 ~ 8
[학술지(정기간행물)] - W. B. Yang / 2006 / High-frequency channel characterization for M-ary frequency-shift-keying underwater acoustic communications / Journal of the Acoustical Society of America 120 (5) : 2615 ~ 2626
[학술지(정기간행물)] - J. Park / 2009 / Frequency and temporal coherence variation for sea surface fluctuation / Japanese Journal of Applied Physics 48 (7S)
[학술지(정기간행물)] - J. Park / 2010 / Underwater acoustic communication channel simulator for flat fading / Japanese Journal of Applied Physics 49 (7S)
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