Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
APPEARED IN THE IEEE/OSA JOURNAL OF LIGHTWAVE TECHNOLOGY, PP. 24382445, OCTOBER 2003 1 Spectral Efficiency of Coded Phase-Shift Keying for Fiber-Optic
 

Summary: APPEARED IN THE IEEE/OSA JOURNAL OF LIGHTWAVE TECHNOLOGY, PP. 24382445, OCTOBER 2003 1
Spectral Efficiency of Coded Phase-Shift Keying for Fiber-Optic
Communication
Gerhard Kramer, Alexei Ashikhmin, Adriaan J. van Wijngaarden, and Xing Wei
Abstract-- Several optical modulation and detection schemes are com-
pared by computing their spectral efficiencies over additive white Gaussian
noise channels. The bandwidth savings of differential quadrature phase
shift keying (D-QPSK) over both direct-detection on-off keying (DD-OOK)
and differential binary phase-shift keying (D-BPSK) suggest that D-QPSK
can improve the reach and efficiency of wavelength-division multiplexing
(WDM) systems. To test the theory, Reed-Solomon and low-density parity-
check forward error correction (FEC) codes are designed and evaluated.
The codes generally behave as expected, except that for D-QPSK the gains
are hampered by the differential detector. It is further shown that neither
multiple-symbol differential detection nor decision-feedback detection is at-
tractive when using strong codes.
Keywords-- error correcting coding, optical signal detection, optical
transmitters, phase shift keying
I. INTRODUCTION
Differential binary phase shift keying (D-BPSK) has recently

  

Source: Ashikhmin, Alexei - Enabling Computing Technologies, Bell Laboratories

 

Collections: Engineering; Mathematics; Computer Technologies and Information Sciences