Multi-relay regeneration for long haul communications

Eado Meron, Meir Feder

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A concatenated additive white gaussian noise (AWGN) relay channel is considered. The different relays are only allowed to carry out simple symbol manipulation (e.g. hard limiter, linear amplifier or any symbol-wise analog scheme). The decay of the overall capacity as a function of the number of concatenated relays is explored. Contrary to point-to-point channels, where using a refined constellation can only increase the capacity, we show that the larger the constellation the faster the capacity decays. Since the initial point-to-point capacity of refined constellations is larger and their decay is faster, there is a tradeoff that leads to an optimal constellation size which is a function of the SNR and the number of relays.

Original languageEnglish
Title of host publication2006 IEEE International Conference on Communications, ICC 2006
Number of pages5
StatePublished - 2006
Event2006 IEEE International Conference on Communications, ICC 2006 - Istanbul, Turkey
Duration: 11 Jul 200615 Jul 2006

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486


Conference2006 IEEE International Conference on Communications, ICC 2006


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