Direct Mapping OFDM-Based Transmission Scheme for Underwater Acoustic Multimedia

Chin-Feng Lin,Chia-Chang Lee, Shiou-Hung Lai,Shun-Hsyung Chang,Ching-Hsiang Tseng,Tzong-Dar Wu,Hoang-Yan Lu,Hsien-Sen Hung,Fu-Sheng Lu

Parallel and Distributed Processing with Applications（2010）

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摘要

In this paper, we propose a direct mapping (DM) orthogonal frequency division multiplexing (OFDM) based transmission scheme for underwater acoustic multimedia (UAM). We adopt DM multi-input multi-output (MIMO), power assignment mechanism, OFDM, adaptive modulation, and unequal error protection in the UAM system. The proposed underwater acoustic multimedia system employs high power, low speed modulation, and schemes providing significant error protection for the transmission of sensor data messages requiring a stringent bit-error rate (BER). In contrast, low power, high speed modulation, and less capable error protection schemes are provided for messages that can tolerate a high BER. Simulation results show that the proposed scheme can not only fulfill the quality of services (QoS) required by a UAM system, but also achieve the mission of maximum transmission bit rates or minimum transmission power.

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关键词

direct mapping,capable error protection scheme,minimum transmission power,high ber,power assignment mechanism,underwater acoustic multimedia,high power modulation,uam system,ofdm modulation,low speed modulation,underwater acoustic communication,dm multiinput multioutput,low power,direct mapping ofdm-based transmission scheme,adaptive modulation,direct mapping ofdm-based transmission,ofdm,transmission scheme,unequal error protection,high power,quality of services,direct mapping orthogonal frequency division multiplexing,maximum transmission bit rate,convolution,underwater acoustics,quality of service,delta modulation,modulation,bit error rate

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