Disintegrated channel estimation in scalable filter-and-forward relay network with IRI coordination

Kao Peng Chou, Jia Chin Lin

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

2 Scopus citations


Accurate channel estimation (CE) techniques are highly desired to achieve the spatial diversity that is supported by multiple relays. This paper investigates a disintegrated CE technique that is unavoidably required for the space-time coding in the cooperative relay network and that can effectively work in a scalable relay network with a fixed protocol. The filter-and-forward (FF) relaying strategy is studied herein with a superimposed training method to estimate channels on different hops. To overcome disadvantage of the interference suppression method in a conventional FF relay network, a generalized filtering technique is proposed to coordinate multi-relay transmissions for reducing inter-relay interference (IRI). The generalized filtering matrix can effectively multiplex the training sequences from different relays to the destination via frequency-division multiplexing (FDM), time-division multiplexing (TDM) and code-division multiplexing (CDM) methods; unlike a conventional beamforming method being seriously constrained on the size of a relay network in which only 2 relays in dual hops are present. The improvements attained using the proposed technique are confirmed comprehensive computer simulations.

Original languageEnglish
Title of host publication2015 Wireless Telecommunications Symposium, WTS 2015
PublisherIEEE Computer Society
ISBN (Electronic)9781479967766
StatePublished - 2 Jun 2015
Event14th Annual Wireless Telecommunications Symposium, WTS 2015 - New York, United States
Duration: 15 Apr 201517 Apr 2015

Publication series

NameWireless Telecommunications Symposium
ISSN (Print)1934-5070


Conference14th Annual Wireless Telecommunications Symposium, WTS 2015
Country/TerritoryUnited States
CityNew York


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