Sea Trial Results of the Direct Sequence Spread Spectrum Underwater Acoustic Communication in the East Sea
نویسندگان
چکیده
منابع مشابه
Sea trial results of a chaotic direct-sequence spread spectrum underwater communication system
Recent theoretical results show that use of chaotic dynamics can significantly increase privacy of digital communication signals. The purpose of this paper is to report sea trial results of a chaotic spread spectrum system. Due to its ability to simultaneously sharing the same frequency band for various users (through Code Division Multiple Access) and its robustness against channel imperfectio...
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Underwater Acoustic Communications Using Direct-Sequence Spread Spectrum
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Acquisition of the code timing in DS/SS systems is addressed for time-varying frequency-selective underwater acoustic channels. Acquisition algorithm based on adaptive channel estimation and fitlering is proposed. The algorithm employs feedback of pre-cursor and post-cursor inter-chip interference to provide a channel estimate from which the code timing is acquired. The channel estimate is also...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of Korea
سال: 2012
ISSN: 1225-4428
DOI: 10.7776/ask.2012.31.7.441