研究生: |
李若萍 Li, Jo-Ping |
---|---|
論文名稱: |
使用多重發光二極體編碼和相機解碼以增加光學通訊頻寬與穩定性 Multi-Greendicator: Optical Wireless Communication with Multi-LED Coding and Camera Decoding for Increased Bandwidth and Robustness |
指導教授: |
周百祥
Chou, Pai H. |
口試委員: |
蔡明哲
Ming-Jer Tsai 周志遠 Jerry Chou |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 資訊工程學系 Computer Science |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 英文 |
論文頁數: | 44 |
中文關鍵詞: | 發光二極體 、手機 、可見光傳輸 |
外文關鍵詞: | LEDs, Smartphones, Visible Light Communication |
相關次數: | 點閱:1 下載:0 |
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利用LED的閃爍傳達重要的訊息在物聯網 (Internet of Things) 中是一項很有用的功能,
而且只需透過配備於智慧型手機上的相機對閃爍的LED做解碼。
前代的技術只針對單個LED做解碼,
使得頻寬和回應時間都受到限制。
為了突破這些限制,
我們嘗試使用不同的方式對多個LED做解碼。
我們可以利用每個裝置上的單個LED閃爍訊息,
並藉由同時偵測多個裝置上的單顆LED,
使得相同時間內能獲得更多的訊息量。
我們也利用在一個裝置上配備多個LED來傳送單個訊息,
藉由同時偵測單個裝置上的多顆LED,
使得單個訊息的傳送時間大幅縮短。
實驗結果顯示,
藉由普遍配備於使用者身上的智慧型手機,
以及對多個LED解碼的技術,
可以真正的突破頻寬和回應時間的限制,
並達到頻寬的增加。
Use of blinking LED to convey useful status information to be decoded
by smartphone cameras has been shown to be a useful feature for end
users of devices in the Internet of Things (IoT). Previous techniques
have been limited to decoding of a single LED, which is limited in
bandwidth and response time. We propose to overcome these limitations
by exploring the use of multiple LEDs in different ways: decoding
multiple devices that output using their own single LED in parallel,
and decoding a single device that raises bandwidth by using multiple
LEDs to encode more information in a given time frame. Experimental
results show the practical limits achieved by a modern
smartphone-class device.
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