Title :
Advanced detection of super-Nyquist WDM QPSK signals with 5-bit/s/Hz spectral efficiency
Author :
Sai Chen ; Chongjin Xie ; Jie Zhang
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
We show that using a quadrature 4-level polybinary detection scheme together with maximum-likelihood-sequence estimation, we can achieve a 5-bit/s/Hz spectral efficiency for super-Nyquist WDM quadrature-phase-shift-keyed signals, with performance comparable to 16-ary quadrature-amplitude modulation.
Keywords :
maximum likelihood estimation; optical communication; phase shift keying; quadrature phase shift keying; wavelength division multiplexing; advanced detection; maximum likelihood sequence estimation; polybinary detection scheme; quadrature amplitude modulation; spectral efficiency; super Nyquist WDM QPSK signals; super Nyquist WDM quadrature phase shift keyed signals; Least squares approximations; Optical receivers; Optical transmitters; Phase shift keying; Signal to noise ratio; Wavelength division multiplexing;
Conference_Titel :
Optical Fiber Communications Conference and Exhibition (OFC), 2015
Conference_Location :
Los Angeles, CA
