Title
Power Minimization for OFDM Transmission with Subcarrier-Pair Based Opportunistic DF Relaying
Abstract
This paper develops a sum-power minimized resource allocation (RA) algorithm subject to a sum-rate constraint for cooperative orthogonal frequency division modulation (OFDM) transmission with subcarrier-pair based opportunistic decode-and-forward (DF) relaying. The improved DF protocol first proposed in is used with optimized subcarrier pairing. Instrumental to the RA algorithm design is appropriate definition of variables to represent source/relay power allocation, subcarrier pairing and transmission-mode selection elegantly, so that after continuous relaxation, the dual method and the Hungarian algorithm can be used to find an (at least approximately) optimum RA with polynomial complexity. Moreover, the bisection method is used to speed up the search of the optimum Lagrange multiplier for the dual method. Numerical results are shown to illustrate the power-reduction benefit of the improved DF protocol with optimized subcarrier pairing.
Year
DOI
Venue
2013
10.1109/LCOMM.2013.012313.122159
IEEE Communications Letters
Keywords
DocType
Volume
Protocols,OFDM,Resource management,Relays,Algorithm design and analysis,Approximation algorithms,Measurement
Journal
17
Issue
ISSN
Citations 
3
1089-7798
18
PageRank 
References 
Authors
0.67
12
3
Name
Order
Citations
PageRank
Tao Wang1517.71
Yong Fang219131.43
Luc Vandendorpe31611160.74