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http://hdl.handle.net/10773/5415
Title: | Distributed space-frequency block coding for a 2-antenna relay in downlink OFDM systems |
Author: | Teodoro, Sara Silva, Adão Gil, João M. Gameiro, Atílio |
Keywords: | Cooperative diversity Dedicated-relay OFDM Space-frequency code User-relay Virtual MIMO Antenna terminals Co-operative diversity Cooperative systems Decode-and-forward Design approaches Non-cooperative OFDM based system OFDM systems Realistic scenario Simulation result Single antenna Space frequency codes Space-frequency block coding Transmission conditions UNCODED User terminals Virtual MIMO Antenna arrays Channel coding Information technology Mobile telecommunication systems Multiplexing Orthogonal frequency division multiplexing Ad hoc networks |
Issue Date: | 2009 |
Publisher: | IEEE |
Abstract: | In this paper we evaluate the coded and uncoded performance of a 2-antenna terminal relaying schem, for downlink OFDM based systems, using efficient space-frequency block coding protocols. We consider that the relay and the base station are equipped with 2 antennas and the user terminal has a single antenna. Two types of relay protocols are accounted for: Equalize-and-Forward and Decode-and-Forward. Signals expressions are derived and the bit error rates obtained for a pratical and preeminent scenario, with LTE parameters and using convolutional channel coding. The performance of the proposed relay-assited scheme is evaluated under realistic scenarios, considering typical pedestrian scenarios based on LTE specifications. Results are compared to those of other relay-assisted design approaches that have been recently proposed for the case of 1-antenna relay and the non-cooperative systems. For this comparison, we implement three propagation scenarios, with different SNR transmission conditions among links. Simulation results show that the availability of a bi-antenna array at the relay significantly improves the cooperative system performance, but improvements are highly dependent on the scenarios and relay protocol as well as of the cooperative second-hop quality. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/5415 |
ISBN: | 9781424445219 |
Appears in Collections: | DETI - Comunicações |
Files in This Item:
File | Description | Size | Format | |
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Sara_ISCIT_2009.pdf | 324.95 kB | Adobe PDF |
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