Study of Ultra-Wideband for Fiber-Wireless Networks
碩士 === 國立中興大學 === 電機工程學系 === 93 === This study focuses on design of an optically-based ultra-wideband (UWB) transmitting system with direct sequence on-off keying (DS-OOK) modulation scheme for fiber-wireless communication networks. The system includes a Fabry-Perot laser diode (FPLD) under gain-swi...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/63476057566480200883 |
| Summary: | 碩士 === 國立中興大學 === 電機工程學系 === 93 === This study focuses on design of an optically-based ultra-wideband (UWB) transmitting system with direct sequence on-off keying (DS-OOK) modulation scheme for fiber-wireless communication networks. The system includes a Fabry-Perot laser diode (FPLD) under gain-switched operation and an erbium-doped fiber amplifier (EDFA) used as an external-injection light source to generate optical pulses on the transmitter end and together with a PIN photodiode and a first-order microwave differentiator to convert optical pulses into electrical Gaussian monocycle pulses on the receiver front-end. The generated first-order Gaussian monocycle pulses can provide large bandwidth for very high-speed communications. Moreover, the fiber dispersion and inter-symbol interference (ISI) problems can be depressed by properly adjust the width of pulse. The simulated and Fast Fourier Transform (FFT) analytical results demonstrated that the presented scheme indeed provides several GHz bandwidths for future UWB fiber-wireless network applications.
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