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Journal Article Effects of Upstream Bit Rate on a Wavelength-Remodulated WDM-PON Based on Manchester or Inverse-Return-to-Zero Coding
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Authors
Hwan Seok Chung, Bong Kyu Kim, Kwang Joon Kim
Issue Date
2008-04
Citation
ETRI Journal, v.30, no.2, pp.255-260
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.4218/etrij.08.1107.0032
Abstract
We compare the performance of a wavelength remodulated wavelength-division- multiplexed passive optical network implemented using Manchester-coded or inverse-return-to-zero (IRZ)-coded signal downstream and non-return-to-zero remodulated signal upstream. We investigate the effects of varying differences between downstream and upstream bit rates on the two coding schemes. When the bit rate ratio of upstream to downstream is less than or equal to 50%, the performance of Manchester coding is better than that of IRZ coding. However, when the bit rate ratio of upstream to downstream is higher than 50%, Manchester code requires appropriate time delay between upstream and downstream signals, whereas IRZ code needs reduced extinction ratio in the downstream signal.
KSP Keywords
Bit rate, Extinction Ratio(ER), Manchester code, Rate ratio, Time Delay, Upstream and downstream, Wavelength-division-multiplexing passive optical network(WDMPON), nonreturn-to-zero(NRZ), return-to-zero(RZ)