Title :
Bit pattern dependence in optical DQPSK modulation
Author :
van den Borne, Dirk ; Gottwald, E. ; Khoe, G.D. ; Gottwald, Erich
Author_Institution :
Eindhoven Univ. of Technol., Eindhoven
Abstract :
A strong bit pattern dependence in optical transmission links employing multilevel modulation formats when pseudorandom binary sequences are used for modulation is demonstrated. The use of pseudorandom quaternary sequences for multilevel modulation is proposed and an efficient method to generate such sequences is presented.
Keywords :
optical links; optical modulation; quadrature phase shift keying; bit pattern dependence; multilevel modulation; multilevel modulation formats; optical DQPSK modulation; optical transmission links; pseudorandom binary sequences; pseudorandom quaternary sequences;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20072339
