Finite-Snr Diversity-Multiplexing Tradeoff For Network Coded Cooperative Ofdma Systems
| Autor: | Gunes Karabulut Kurt, Murat Uysal, Ali Reza Heidarpour |
|---|---|
| Přispěvatelé: | Özyeğin University, Uysal, Murat, Heidarpour, Ali Reza |
| Rok vydání: | 2017 |
| Předmět: |
Orthogonal frequency-division multiplexing
Computer science Finite-SNR diversity-multiplexing tradeoff (DMT) Orthogonal frequency-division multiple access 050801 communication & media studies Throughput Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Multiplexing 0508 media and communications Rician fading 0202 electrical engineering electronic engineering information engineering Computer Science::Networking and Internet Architecture Electrical and Electronic Engineering Network coded cooperation (NCC) Computer Science::Information Theory Wireless network business.industry Applied Mathematics ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 05 social sciences 020206 networking & telecommunications Orthogonal frequency division multiple access (OFDMA) Antenna diversity Computer Science Applications Computer Science::Performance Telecommunications business Algorithm Communication channel |
| Popis: | Due to copyright restrictions, the access to the full text of this article is only available via subscription. Network-coded cooperation (NCC) is an effective method to improve the throughput efficiency in cooperative wireless networks. The combined use of orthogonal frequency division multiplexing (OFDM) with NCC has been further studied in the literature to exploit the multipath diversity gains. In this paper, we consider orthogonal frequency division multiple access (OFDMA), an extension of OFDM to a multiuser system where subsets of carriers are assigned to different users. We first derive a closed-form expression for the outage probability of NCC-OFDMA over Rician fading channels and then present the asymptotical and finite-SNR DMT expressions. Our results provide insight into the performance mechanisms under practical SNR regime of NCC-OFDMA systems and demonstrate that NCC-OFDMA is able to fully exploit both frequency and spatial diversity. We also show that the derived finite-SNR DMT converges to an asymptotical one as expected. Furthermore, special cases for our derived analytical expressions are presented, to show that the derived expression is a generalized case of the related the state of the art results. Simulation results are further presented to verify our theoretical analyses. TÜBİTAK |
| Databáze: | OpenAIRE |
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