Indoor Positioning Based on Visible Light Communication

• Main Authors: Cheng-You Yao, 姚承佑
• Other Authors: 曾柏軒
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/mp6h64

碩士 === 國立臺北科技大學 === 電子工程系研究所 === 103 === Visible light communication (VLC) has the advantage by utilizing higher bandwidth and lower cost. By implementing the multiplexing transmission for data communication, the goal of the thesis is to use visible light communication to perform positioning application in indoor space. In general, lighting equipment always is on the top in indoor, where the path of the transmission is not affected by the obstacles. This study utilizes On-off keying (OOK) modulation with code division multiple access (CDMA) to produce orthogonal and different code. Each LED transmits different CDMA codes, the user can detect and distinguish different codes simultaneously with primary signal cancellation. The VLC system with CDMA is implemented on the USRP and the distance error of 1-D localization is below 1 meter.