| Author | Meathee Kaewnin |
| Call Number | AIT RSPR no. TC-95-5 |
| Subject(s) | Optical communications
|
| Note | A research submitted in partial fulfillment of the requirement for the degree of Master of
Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | A novel optical fiber transmission system using the hybrid digital 2-level PAM and analogue
PWM technigue is proposed. It can simultaneously transmit two-channel signals over the common
optical fiber in a cost-effective and bandwidth conservation fashion. The analogue signal is
transmitted by using the pulse width modulation, while the digital signal is encoded in the
amplitude axis of the analogue PWM pulse stream. That is a high-level amplitude corresponds to
a data bit "l" sent, whereas a low-level amplitude corresponds to a data bit "O" sent.
The performance of the system is evaluated by considering SNR of 50 dB (for video
communications) and BER of 10ยท
9 (for digital communications) as the lower bound. The results
show that the system can perform better than the required lower bound. The proposed digital
2-level PAM and analogue PWM systems can be also used to transmit the multiplexed digital
(e.g., TDM) signal and analogue FDM signal simultaneously, which can be potentially suitable for
future multimedia applications. |
| Year | 1995 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Zhang, Jian-Guo |
| Examination Committee(s) | Ahmed, Kazi Mohiuddin ;Chindakorn Tuchinda |
| Scholarship Donor(s) | Royal Thai Navy; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1995 |