The Design of Infrared Optical MODEM
In this study, an infrared optical MODEM circuit has been designed to use in data communication in the free space. Designed circuit consists of a transmitter and a receiver. The data which has been sent by the transmitter modulates an infrared LED’s light. A photodiode which is connected as photocon...
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| Format: | Article |
| Language: | English |
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Bursa Uludag University
2013-04-01
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| Series: | Uludağ University Journal of The Faculty of Engineering |
| Subjects: | |
| Online Access: | http://mmfdergi.uludag.edu.tr/article/view/5000082468 |
| _version_ | 1828017173418737664 |
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| author | Erdem ÖZÜTÜRK |
| author_facet | Erdem ÖZÜTÜRK |
| author_sort | Erdem ÖZÜTÜRK |
| collection | DOAJ |
| description | In this study, an infrared optical MODEM circuit has been designed to use in data communication in the free space. Designed circuit consists of a transmitter and a receiver. The data which has been sent by the transmitter modulates an infrared LED’s light. A photodiode which is connected as photoconductive mode has been used as photo detector at the receiver end. The LED has been driven with pulsed high current to increase communication distance. The data pulses must be modulated in suitable way for driving LED with high current pulses. Suitable modulation (and demodulation) technique has been designed for this in here. Two short pulses which consist of two different pulse duration have been generated at the rising and falling edges of the data pulses during the modulation process and these short pulses have been demodulated in suitable way at the receiver. The structure of each part of modem circuit which designed here has been examined and how the modem is working has been explained by drawing some signals relative to each other which are observed from certain nodes of circuit |
| first_indexed | 2024-04-10T10:46:03Z |
| format | Article |
| id | doaj.art-fd8f276c23d84c45827c964097309a1a |
| institution | Directory Open Access Journal |
| issn | 2148-4147 2148-4155 |
| language | English |
| last_indexed | 2024-04-10T10:46:03Z |
| publishDate | 2013-04-01 |
| publisher | Bursa Uludag University |
| record_format | Article |
| series | Uludağ University Journal of The Faculty of Engineering |
| spelling | doaj.art-fd8f276c23d84c45827c964097309a1a2023-02-15T16:20:20ZengBursa Uludag UniversityUludağ University Journal of The Faculty of Engineering2148-41472148-41552013-04-0118112112910.17482/uujfe.877785000077172The Design of Infrared Optical MODEMErdem ÖZÜTÜRKIn this study, an infrared optical MODEM circuit has been designed to use in data communication in the free space. Designed circuit consists of a transmitter and a receiver. The data which has been sent by the transmitter modulates an infrared LED’s light. A photodiode which is connected as photoconductive mode has been used as photo detector at the receiver end. The LED has been driven with pulsed high current to increase communication distance. The data pulses must be modulated in suitable way for driving LED with high current pulses. Suitable modulation (and demodulation) technique has been designed for this in here. Two short pulses which consist of two different pulse duration have been generated at the rising and falling edges of the data pulses during the modulation process and these short pulses have been demodulated in suitable way at the receiver. The structure of each part of modem circuit which designed here has been examined and how the modem is working has been explained by drawing some signals relative to each other which are observed from certain nodes of circuithttp://mmfdergi.uludag.edu.tr/article/view/5000082468MODEM, LED, photodiode, pulse duration modulation |
| spellingShingle | Erdem ÖZÜTÜRK The Design of Infrared Optical MODEM Uludağ University Journal of The Faculty of Engineering MODEM, LED, photodiode, pulse duration modulation |
| title | The Design of Infrared Optical MODEM |
| title_full | The Design of Infrared Optical MODEM |
| title_fullStr | The Design of Infrared Optical MODEM |
| title_full_unstemmed | The Design of Infrared Optical MODEM |
| title_short | The Design of Infrared Optical MODEM |
| title_sort | design of infrared optical modem |
| topic | MODEM, LED, photodiode, pulse duration modulation |
| url | http://mmfdergi.uludag.edu.tr/article/view/5000082468 |
| work_keys_str_mv | AT erdemozuturk thedesignofinfraredopticalmodem AT erdemozuturk designofinfraredopticalmodem |