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Type: | Artigo |
Title: | An adaptive transmission scheme for cognitive decode-and-forward relaying networks: half duplex, full duplex, or no cooperation |
Author: | Olivo, Edgar Eduardo Benitez Osorio, Diana Pamela Moya Alves, Hirley Santos Filho, Jose Candido Silveira Latva-aho, Matti |
Abstract: | We propose an adaptive transmission scheme for cognitive decode-and-forward relaying networks, whereby, before each communication process, one out of three transmission modes is dynamically selected in order to maximize the instantaneous capacity of the system, namely, half-duplex (HD) relaying, full-duplex (FD) relaying, or direct transmission with no cooperation. The following key issues, relevant to underlay spectrum sharing and cooperative relaying, are considered: 1) the overall transmit power at the secondary network is constrained by both the maximum tolerable interference at the primary receiver and the maximum transmit power available at the secondary nodes; 2) under FD operation, the secondary relay is subject to residual self-interference, which is modeled as a fading channel; and 3) the signals coming from the secondary source and relay are handled at the secondary destination via maximal-ratio combining, in the HD relaying mode, and via a joint-decoding technique, in the FD relaying mode. We derive an exact analytical expression for the outage probability of the proposed scheme. Then, an approximate closed-form expression is proposed, and a corresponding asymptotic expression is derived. Monte Carlo simulations are run to validate the accuracy of the presented mathematical analysis and to showcase the tightness of the proposed approximation |
Subject: | Rádios cognitivos |
Country: | Estados Unidos |
Editor: | Institute of Electrical and Electronics Engineers |
Rights: | Fechado |
Identifier DOI: | 10.1109/TWC.2016.2562109 |
Address: | https://ieeexplore.ieee.org/document/7464337 |
Date Issue: | 2016 |
Appears in Collections: | FEEC - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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000381509900033.pdf | 2.38 MB | Adobe PDF | View/Open |
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