Title :
Multilevel Modulated Signal Transmission Over Serial Single-Mode and Multimode Fiber Links Using Vertical-Cavity Surface-Emitting Lasers for Millimeter-Wave Wireless Communications
Author :
Nkansah, Anthony ; Das, Anjali ; Gomes, Nathan J. ; Shen, Pengbo
Author_Institution :
Kent Univ., Canterbury
fDate :
6/1/2007 12:00:00 AM
Abstract :
Quadrature phase-shift keying, 16 quadrature amplitude modulation (QAM), and 64-QAM data transmission - Worldwide Interoperability for Microwave Access modulation schemes - at 6 and 20 MS/s is demonstrated for a link that emulates a cost-effective 1.55 mum vertical-cavity surface-emitting laser based radio over fiber millimeter-wave indoor picocellular system. The system consists of a concatenation of 20-km single-mode fiber and 300-m multimode fiber links between a central office and remote antenna unit and employs remote 30-GHz local oscillator delivery. Successful transmission over both optical and wireless paths is achieved with good error vector magnitude performance recorded for both uplink and downlink. The performance is compared to other demonstrations of multilevel signal transmission in millimeter-wave over fiber systems.
Keywords :
data communication; microwave photonics; picocellular radio; quadrature amplitude modulation; quadrature phase shift keying; radio-over-fibre; surface emitting lasers; 16 QAM; 64-QAM data transmission; QPSK; central office; distance 20 km; distance 300 m; frequency 30 GHz; local oscillator; microwave access modulation; millimeter-wave indoor picocellular system; millimeter-wave over fiber systems; millimeter-wave wireless communications; multilevel modulated signal transmission; multilevel signal transmission; multimode fiber links; quadrature amplitude modulation; quadrature phase-shift keying; radio over fiber; remote antenna unit; single-mode fiber links; vertical-cavity surface-emitting lasers; wavelength 1.55 micron; worldwide interoperability; Data communication; Fiber lasers; Masers; Optical fiber communication; Phase modulation; Phase shift keying; Quadrature amplitude modulation; Surface emitting lasers; Vertical cavity surface emitting lasers; Wireless communication; Millimeter-wave communications; Worldwide Interoperability for Microwave Access (WiMAX); picocellular systems; radio over fiber system; vertical-cavity surface-emitting laser (VCSEL);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2007.897728
