Title :
Photonic Generation of Ultrawideband (UWB) Pulse With Tunable Notch-Band Behavior
Author :
Zheng, Jianyu ; Zhu, Ninghua ; Wang, Lixian ; Liu, Jianguo ; Liang, Honggang
Author_Institution :
State Key Lab. on Integrated Optoelectron., Inst. of Semicond., Beijing, China
fDate :
6/1/2012 12:00:00 AM
Abstract :
A photonic approach to generating the ultrawideband (UWB) pulses with tunable band-rejection behavior based on a negative coefficient two-tap microwave photonic filter is proposed and experimentally demonstrated. To avoid the interference between UWB and the Wireless Fidelity system, the UWB pulse with the “batwing” shape, which corresponds to the 5-GHz notch-band in frequency domain, is generated. Moreover, the band-notched position of the generated UWB signals could be tuned by adjusting the basic delay of the microwave photonic filter. Utilizing the optically tunable band-rejection character, the UWB systems can coexist with existing and future wireless network technologies almost without interference, as well as provide the opportunity for the combination between UWB-over-fiber and cognitive radio.
Keywords :
cognitive radio; microwave filters; microwave photonics; optical filters; optical pulse generation; radio-over-fibre; ultra wideband communication; UWB fidelity system; UWB systems; UWB-over-fiber; batwing shape; cognitive radio; frequency 5 GHz; tunable band-rejection; two-tap microwave photonic filter; ultrawideband pulse photonic generation; wireless fidelity system; wireless network; Microwave filters; Optical attenuators; Optical filters; Optical pulses; Optical reflection; Photonics; Wavelength division multiplexing; Ultrawideband radio; cognitive radio-over-fiber; microwave photonic filtering;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2193562
