NDLI: A digital acoustic transceiver for underwater communication without PLL and DLL

Content Provider	IEEE Xplore Digital Library
Author	Youngchol Choi Sea-Moon Kim Jong-Won Park Yong-Kon Lim Hak-Lim Ko
Copyright Year	2003
Description	Author affiliation: Korea Res. Inst. of Ships & Ocean Eng., Daejeon, South Korea (Youngchol Choi; Sea-Moon Kim; Jong-Won Park; Yong-Kon Lim)
Abstract	This paper proposes a phase coherent all-digital transceiver for underwater acoustic communication, which allows the system to reduce complexity and increase robustness in time variant underwater environments. It is designed in the digital domain except for amplifiers and implemented by using a multiple digital signal processors (DSPs) system. For phase coherent reception, conventional systems employed phase-locked loop (PLL) and delay-locked loop (DLL) for synchronization, but this paper suggests a new frame synchronization scheme based on the quadrature receiver structure without using them. DSP implementation is based on block data parallel architecture (BDPA). We show experimental results in the underwater anechoic basin at KRISO. The results indicate that the frame synchronization is performed without PLL. Also, we show that the adaptive equalizer can compensate frame synchronization error and the correction capability is dependent on the length of equalizer.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	1781
Ending Page	1785
File Size	282601
Page Count	5
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178156
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Underwater acoustics Transceivers Underwater communication Phase locked loops Digital signal processing Robustness Signal design Digital signal processors Delay Parallel architectures
Content Type	Text
Resource Type	Article

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