Title :
System capacity for millimeter-wave radio-over-fiber distribution employing an optically supported PLL
Author :
Griffin, Robert A. ; Salgado, H.M. ; Lane, P.M. ; O´Reilly, J.J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK
fDate :
12/1/1999 12:00:00 AM
Abstract :
We consider the performance of a hybrid radio-over-fiber distribution system with a remote phase-locked loop (PLL) providing the local oscillator for upconversion to millimeter (mm)-wave frequencies. The reference signal for the PLL is transmitted together with digitally modulated subcarriers over a fiber link, allowing centralization of radio processing. Through analysis and simulation, we identify the relationship between the phase noise requirement for the PLL and the data capacity of the fiber link. For a practical link, we provide an upper limit on system capacity for transmission of 16 quadrature amplitude modulation (QAM) subcarriers
Keywords :
microwave links; microwave photonics; optical fibre subscriber loops; optical phase locked loops; quadrature amplitude modulation; radio access networks; data capacity; digitally modulated subcarriers; fiber link; hybrid radio-over-fiber distribution system; local oscillator; millimeter-wave frequencies; millimeter-wave radio-over-fiber distribution; mm-wave frequencies; optically supported PLL; phase noise requirement; quadrature amplitude modulation subcarriers; radio processing; reference signal; remote phase-locked loop; system capacity; upper limit; Digital modulation; Frequency; Local oscillators; Optical fiber devices; Optical fibers; Optical filters; Optical receivers; Optical transmitters; Phase locked loops; Phase noise;
Journal_Title :
Lightwave Technology, Journal of
