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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51238

Title: MIMO GS OVSF/OFDM Based Underwater Acoustic Multimedia Communication Scheme
Authors: Chin-Feng Lin
Hsiu-Hung Lai
Shun-Hsyung Chang
Contributors: 國立臺灣海洋大學電機工程學系
Keywords: Underwater acoustic multimedia communication
Orthogonal variable spreading factor
Gold sequence
Space–time block code
Bit error rates
Power saving ratios
Date: 2018-04
Issue Date: 2018-11-20T01:07:44Z
Publisher: Wireless Personal Communications
Abstract: Abstract: An underwater acoustic multimedia communication (UWAMC) system is proposed with 2400 transmission modes according to time-varying multipath underwater acoustic (UWA) channel conditions. The orthogonal variable spreading factor (OVSF) scheme and Gold sequence (GS) scramble code are integrated into multi-input multi-output UWAMC system based on orthogonal frequency-division multiplexing to achieve the quality of service of multimedia transmission in the UWA channel. Binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) adaptive modulation, direct mapping (DM) or space–time block code (STBC) transmission strategies, convolution channel code with rate 1/2 and 1/3, and a power assignment mechanism were adopted in the proposed system. Simulation results show that the bit error rate (BER) and power saving ratio (PSR) performance of the STBC strategy with transmission diversity is superior to that of the DM strategy without transmission diversity, and the performance of the BERs and PSRs of the transmission scheme with the GS scramble code surpasses that of the scheme without the code. The performance of the BERs and PSRs of BPSK modulation with a channel code rate of 1/3 is better than that of BPSK modulation with a channel code rate of 1/2, and the performances of BERs and PSRs of BPSK modulation with a channel code rate of 1/3 are better than that of QPSK modulation with a channel code rate of 1/3. As the length of the OVSF codes increases, the UWAMC system’s BERs decrease, and its PSRs increase. The UWAMC system can achieve either maximum transmission speed or maximum transmission power efficiency.
Relation: 101(2) pp.601-617
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51238
Appears in Collections:[電機工程學系] 期刊論文

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