TY - GEN
T1 - Resource allocation for two-users DF-OFDMA systems
AU - Al-Tous, Hanan
AU - Barhumi, Imad
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/24
Y1 - 2014/11/24
N2 - A low complexity algorithm is proposed to jointly allocate the resources, namely subcarrier assignment and power profiles at the sources and relay nodes for two users decode and forward (DF) relaying scheme using orthogonal frequency division multiple access (OFDMA). The objective is to allocate the resources to maximize the weighted sum rate subject to individual power constraint on each node. We formulate such a problem as subcarrier based resource allocation that seeks joint optimization of subcarrier assignment and power profiles at the source and relay nodes. Using high signal-to-noise- ratio (SNR) approximation, the proposed algorithm splits the subcarriers into two partitions based on channel gains' ordering, where each partition is assigned to one user. The computational complexity of finding the subcarrier assignment that maximizes the weighted sum rate for N subcarriers DF-OFDMA scenario is of O(N). The merits of the proposed algorithm is demonstrated by numerical simulations.
AB - A low complexity algorithm is proposed to jointly allocate the resources, namely subcarrier assignment and power profiles at the sources and relay nodes for two users decode and forward (DF) relaying scheme using orthogonal frequency division multiple access (OFDMA). The objective is to allocate the resources to maximize the weighted sum rate subject to individual power constraint on each node. We formulate such a problem as subcarrier based resource allocation that seeks joint optimization of subcarrier assignment and power profiles at the source and relay nodes. Using high signal-to-noise- ratio (SNR) approximation, the proposed algorithm splits the subcarriers into two partitions based on channel gains' ordering, where each partition is assigned to one user. The computational complexity of finding the subcarrier assignment that maximizes the weighted sum rate for N subcarriers DF-OFDMA scenario is of O(N). The merits of the proposed algorithm is demonstrated by numerical simulations.
KW - DF Cooperative Communications
KW - OFDMA
KW - Resource Allocation
KW - Weighted Sum Rate
UR - http://www.scopus.com/inward/record.url?scp=84919444456&partnerID=8YFLogxK
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U2 - 10.1109/VTCFall.2014.6966158
DO - 10.1109/VTCFall.2014.6966158
M3 - Conference contribution
AN - SCOPUS:84919444456
T3 - IEEE Vehicular Technology Conference
BT - 2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 80th IEEE Vehicular Technology Conference, VTC 2014-Fall
Y2 - 14 September 2014 through 17 September 2014
ER -