Underwater acoustic modem using multi-carrier modulation

被引：2

作者：

Yeung, LF ^{[1
]}

Bradbeer, RS ^{[1
]}

Law, ETM ^{[1
]}

Wu, A ^{[1
]}

Li, B ^{[1
]}

Gu, ZG ^{[1
]}

机构：

[1] City Univ Hong Kong, Underwater Syst Lab, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

OCEANS 2003 MTS/IEEE: CELEBRATING THE PAST...TEAMING TOWARD THE FUTURE | 2003年

关键词：

D O I：

10.1109/OCEANS.2003.178059

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

An underwater digital acoustic communications system based on multicarrier modulation technique is presented. This technique is relatively robust in a strong multipath fading environment and has been successfully tested in a shallow water channel at a data rate up to 10kbps over 1km. The test system using 48 carrier frequencies for transmitting 48 parallel bits of data in each packet. The data stream is encoded into a sequence of packets. These packets are encapsulated by headers, synchronisation and training signals. In order to reduce the multipath fading problem, an adaptive channel equalisation scheme with a LSM algorithm is used. The multipath fading problem can be further improved by a redundant carrier assignment and wavelet based MFM scheme. The advantage of this scheme is that the fading is reduced without affecting the channel capacity.

引用

页码：1368 / 1375

页数：8

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