40 Gb/s CAP32 system with DD-LMS equalizer for short reach optical transmissions

Li Tao, Yiguang Wang, Yuliang Gao, Pak Tao Lau, Nan Chi, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

70 Citations (Scopus)


Carrierless amplitude and phase (CAP) modulation is a promising candidate for short reach optical communications. In this letter, we propose the use of decision-directed least mean square (DD-LMS) adaptive equalization algorithm for high-order CAP transmission systems. The optimal length of taps and step size of DD-LMS algorithm is investigated for 30 Gb/s and 40 Gb/s CAP32 systems. A hybrid equalization technique that consists of DD-LMS and its aided two-stage pre-convergence is proposed that allows experimental transmission of 40 Gb/s CAP32 40 km standard single mode fiber (SSMF).
Original languageEnglish
Article number6648641
Pages (from-to)2346-2349
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number23
Publication statusPublished - 27 Nov 2013


  • adaptive equalization
  • Carrierless amplitude and phase
  • DD-LMS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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