A MIMO OFDM-Based Underwater Acoustic Multimedia Communication Scheme-2

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Project title

Code/計畫編號

NSC99-2221-E022-019

Translated Name/計畫中文名

基於OFDM之先進水下通訊技術研究---水中聲波多輸入多輸出OFDM多媒體通訊技術-2

Project Coordinator/計畫主持人

Chin-Feng Lin

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

張順雄

Department/Unit

National Kaohsiung University of Science and Technology, NKUST

Website

https://www.grb.gov.tw/search/planDetail?id=2149380

Year

2010

Start date/計畫起

01-08-2010

Expected Completion/計畫迄

01-07-2011

Bugetid/研究經費

361千元

ResearchField/研究領域

土木水利工程
電信工程

在子計畫(二)，我們提出一種正交分頻多工技術水下聲學多媒體通訊技術。並討論G.729 音訊訊號、感測資料和影像在水下聲波傳輸情況。功率配置機制、適應性調變技術和不同程度錯誤更正機制是被應用達到最大傳輸速度和最低傳輸功耗。這個傳輸技術的特徵在於較高傳輸功率、時空編碼策略、較大程度錯誤更正機制和較低程度的調變技術是應用於感測資料傳輸；較低傳輸功率、直接映射策略、較低程度錯誤更正機制和較高程度的調變技術是應用於音訊影像傳輸。去年，我們已討論單輸入單輸出正交分頻多工水下聲學多媒體通訊技術和多輸入多輸出直接映射正交分頻多工水下聲學多媒體通訊技術；在今年，我們將討論多輸入多輸出時空編碼正交分頻多工水下聲學多媒體通訊技術並討論多使用者干擾、同步與通道誤差參數對多輸入多輸出時空編碼正交分頻多工水下聲學多媒體通訊效能之影響；在第三年，我們將在碧沙漁港進行實際測試，並且反覆修正我們所提出之水下聲學多媒體通訊技術，使其適合短距離水下聲學多媒體通訊之應用。 In this sub-project 2, we study an orthogonal frequency division multiplexing (OFDM)-based transmission scheme for underwater acoustic multimedia communication and discuss the G.729 audio signals, sensor data, and image transmission in the underwater environment. A power assignment scheme, adaptive modulation, and an unequal error protection scheme are adopted to maximize the transmission rate or minimize the transmission power. An essential feature of this transmission scheme is that high power, a space time block code (STBC) strategy, high-efficiency error protection schemes, and low-level modulations are adopted for the sensor data information. In contrast, low power, a direct map (DM) transmission strategy, low-efficiency error protection schemes, and high-level modulations are adopted for audio and image messages that can tolerate a high bit error rate. Last year, we studied single-input-single-output (SISO) OFDM, and DM multi-input multi-output (MIMO) OFDM transmission platforms. In the present year, we will study the STBC MIMO OFDM transmission platform. In addition, we plan to discuss the errors in the effects of multiuser interference, synchronization, and channel estimation will be discussed. In the third year, we will carry out a transmission test Keelung and revise the proposed MIMO OFDM-based transmission platform for short-distance underwater multimedia application.

Keyword(s)

空間時間方塊編碼傳輸策略之正交分頻多工技術
水中聲學多媒體通訊
服務品質參數

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A MIMO OFDM-Based Underwater Acoustic Multimedia Communication Scheme-2

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