Bit pattern dependence in optical DQPSK modulation

D. Borne, van den, E. Gottwald, G.D. Khoe, H. Waardt, de

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)1223-1225
Number of pages2
JournalElectronics Letters
Issue number22
Publication statusPublished - 2007


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