Open AccessData-Aided Versus Blind Single-Carrier Coherent Receivers
Author(s) -
Maxim Kuschnerov,
M. Chouayakh,
K. Piyawanno,
B. Spinnler,
E. de Man,
P. Kainzmaier,
Mohammad S. Alfiad,
A. Napoli,
Berthold Lankl
Publication year - 2010
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2010.2048308
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
Fiber-optic research in signal processing for the first generation of coherent communication systems was dominated by receivers with blind adaptation. Next-generation systems will require a scalable and modular design for higher order modulation formats. Due to the nature of the fiber channel and the required parallelization in high-speed receivers, data-aided and blind algorithms call for a general reassessment when used in coherent optic receivers employing higher order modulation formats. In this paper, blind and data-aided receivers are compared for coherent single-carrier optical systems in terms of complexity, tracking ability, and convergence speed. Methods for equalization are discussed for time-domain- and frequency-domain-based receivers covering the most important algorithms. The general superiority of data-aided frequency-domain equalization is demonstrated.