NDLI: Optimal power allocation in linearly coded OFDMA relay networks

Content Provider	IEEE Xplore Digital Library
Author	Honghai Yu Sumei Sun
Copyright Year	2010
Description	Author affiliation: Institute for Infocomm Research, A*STAR, 1 Fusionopolis Way, #21-01 Connexis (South Tower), Singapore 138632 (Honghai Yu; Sumei Sun)
Abstract	In this paper, a linearly coded (LC) relaying scheme is proposed for multiuser relay network in which a number of users communicate simultaneously with a common destination with the help of one relay node, by using orthogonal frequency division multiple access (OFDMA). The proposed linear coding at the relay node enables exploiting the frequency diversity in the relay-to-destination (R-to-D) link. Moreover, closed-form pairwise error probability (PEP) and asymptotically tight bit error rate (BER) for linearly coded orthogonal frequency division multiplexing (LC-OFDM) system are derived so that an accurate end-to-end (source to destination) BER expression can be obtained. Based on this accurate end-to-end BER expression, optimal power allocation strategy between source nodes and relay node is easily developed by convex optimization when the total transmit power is a constraint. Simulation results show that our optimal power allocation consumes only half the power of equal power allocation in high signal-to-noise ratio (SNR) region.
Starting Page	897
Ending Page	902
File Size	349708
Page Count	6
File Format	PDF
ISBN	9781424497225
ISSN	10586393
e-ISBN	9781424497218
DOI	10.1109/ACSSC.2010.5757697
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit error rate Relays Resource management Signal to noise ratio OFDM Encoding Eigenvalues and eigenfunctions
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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