title: Effects of Modulation Techniques (Manchester Code, NRZ or RZ) on the Operation of Hybrid WDM/TDM Passive Optical Networks.
abstract: In this paper, the performance and feasibility of a hybrid wavelength division multiplexing/time division multiplexing passive optical network (WDM/TDM PON) system with 128 optical network units (ONUs) is analysed. In this system, triple play services (video, voice and data) are successfully communicated through a distance of up to 28 km. Moreover, we analysed and compared the performance of various modulation formats for different distances in the proposed hybrid WDM/TDM PON. NRZ rectangular emerged as the most appropriate modulation format for triple play transmission in the proposed hybrid PON.
authors.affiliation: Department of Electronic Engineering, Harare Institute of Technology, Harare, Zimbabwe.
authors.forename: Kumbirayi
authors.initials: K
authors.lastname: Nyachionjeka
authors.affiliation: Department of Information Technology, Harare Institute of Technology, Harare, Zimbabwe.
authors.forename: Wellington
authors.identifier: 0000-0001-5047-8297
authors.initials: W
authors.lastname: Makondo