A OFDM-Based Transmission Scheme for Underwater Acoustic Multimedia Communication(I)-2

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Project title

Code/計畫編號

NSC98-2221-E022-018

Translated Name/計畫中文名

應用MIMO-OFDM之水下多媒體通訊平台建置---水中聲波正交分頻多工多媒體傳輸技術(I)-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
李佳昌

Department/Unit

National Kaohsiung University of Science and Technology, NKUST

Website

https://www.grb.gov.tw/search/planDetail?id=1915384

Year

2009

Start date/計畫起

01-08-2009

Expected Completion/計畫迄

01-07-2010

Bugetid/研究經費

442千元

ResearchField/研究領域

土木水利工程
電信工程

在子計畫(四)，我們將應用正交分頻多工技術在水下聲學多媒體通訊。我們將討論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、正交變化展頻碼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。第一年，我們將進行單輸入單輸出正交分頻多工傳輸技術研習；第二年，我們將進行單輸入多輸出正交分頻多工傳輸技術研習；第三年，我們將進行多輸入多輸出正交分頻多工傳輸技術研習。並且，多使用者干擾效應、同步誤差和通道估測誤差將被研習；並在高雄海域進行量測。 In this sub-project 4, we study an Orthogonal Frequency Division Multiplexing (OFDM)-based transmission scheme for underwater acoustic multimedia communication. We will discuss G.729 audio signal, sensor data, and image transmission for underwater environment. Power assignment mechanism, adaptive modulation, orthogonal variable spreading factor (OVSF) codes, and unequal error protection mechanism are adopted to achieve maximum transmission rate or minimum transmission power. An essential feature of this transmission scheme is that high power, the space time block code (STBC) strategy, more capable error protection schemes, and low-level modulations are allocated to the sensor data information. In contrast, low power, direct map (DM) error protection schemes, and high-level modulations are granted to audio and video messages that can tolerate high bit error rate. In first year, we will study single input single output (SISO) OFDM transmission platform. In second year, we will study single input multiple output (SIMO) OFDM transmission platform. In third year, we will study multiple input multiple output (MIMO) OFDM transmission platform. In addition, the error effects of multiuser interference, synchronization, and channel estimation will be discussed and make a transmission testing in Kaohsiung.

Keyword(s)

正交分頻多工
水下多媒體
多輸入多輸出
OFDM
underwater multimedia
MIMO

DSpace CRIS

A OFDM-Based Transmission Scheme for Underwater Acoustic Multimedia Communication(I)-2

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