Title : 
Experimental 2.5-Gb/s QPSK WDM Phase-Modulated Radio-Over-Fiber Link With Digital Demodulation by a 
 
 -Means Algorithm
 
         
        
            Author : 
Gonzalez, Neil Guerrero ; Zibar, Darko ; Caballero, Antonio ; Monroy, Idelfonso Tafur
         
        
            Author_Institution : 
DTU Fotonik, Tech. Univ. of Denmark, Lyngby, Denmark
         
        
        
        
        
            fDate : 
3/1/2010 12:00:00 AM
         
        
        
        
            Abstract : 
Highest reported bit rate of 2.5 Gb/s for optically phase-modulated radio-over-fiber (RoF) link, employing digital coherent detection, is demonstrated. Demodulation of 3??2.5 Gb/s quadrature phase-shift-keying modulated wavelength-division-multiplexed RoF channels is achieved after 79 km of transmission through deployed fiber. Error-free performance (bit-error rate corresponding to 10-4) is achieved using a digital coherent receiver in combination with a K-means algorithm for radio-frequency phase recovery.
         
        
            Keywords : 
optical modulation; phase modulation; quadrature phase shift keying; radio-over-fibre; wavelength division multiplexing; K -means algorithm; QPSK; WDM; digital coherent detection; digital demodulation; error-free performance; phase-modulation; radio-frequency phase recovery; radio-over-fiber link; Carrier recovery; coherent communication; digital receivers; digital signal processing (DSP); phase-modulation; radio-over-fiber (RoF);
         
        
        
            Journal_Title : 
Photonics Technology Letters, IEEE
         
        
        
        
        
            DOI : 
10.1109/LPT.2009.2039640