TY - GEN
T1 - A low complexity algorithm for mode-selection of OFDM relaying systems
AU - Al-Tous, Hanan
AU - Barhumi, Imad
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/9/26
Y1 - 2017/9/26
N2 - A low complexity algorithm is proposed for joint allocation of power profiles at the source and relay nodes and subcarrier mode-selection for a single user relay aided orthogonal frequency division multiplexing (OFDM) cooperative communication system. Two scenarios are addressed in this work, in the first scenario, the relay uses DF cooperative relaying to transmit data on a set of available subcarriers, and the remaining subcarriers are used for direct transmission. In the second scenario, the relay uses AF with diversity on a set of available subcarriers, and the remaining subcarriers are used for DF with diversity. The objective is to allocate the resources to maximize the data rate over one OFDM symbol subject to either individual power constraint on each node or total power constraint. We formulate such a problem as subcarrier based resource allocation that seeks joint optimization of subcarrier mode-selection and power profiles at the source and relay nodes. The algorithm is based on an ordering of the channel gains ratio and splitting them into two partitions. The partition that maximizes the OFDM symbol rate is sought. Simulation results demonstrate the merit of the proposed algorithm.
AB - A low complexity algorithm is proposed for joint allocation of power profiles at the source and relay nodes and subcarrier mode-selection for a single user relay aided orthogonal frequency division multiplexing (OFDM) cooperative communication system. Two scenarios are addressed in this work, in the first scenario, the relay uses DF cooperative relaying to transmit data on a set of available subcarriers, and the remaining subcarriers are used for direct transmission. In the second scenario, the relay uses AF with diversity on a set of available subcarriers, and the remaining subcarriers are used for DF with diversity. The objective is to allocate the resources to maximize the data rate over one OFDM symbol subject to either individual power constraint on each node or total power constraint. We formulate such a problem as subcarrier based resource allocation that seeks joint optimization of subcarrier mode-selection and power profiles at the source and relay nodes. The algorithm is based on an ordering of the channel gains ratio and splitting them into two partitions. The partition that maximizes the OFDM symbol rate is sought. Simulation results demonstrate the merit of the proposed algorithm.
KW - DF/AF cooperative communications
KW - OFDM
KW - data rate
KW - mode-selection
KW - resource allocation
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U2 - 10.1109/JIEEEC.2017.8051418
DO - 10.1109/JIEEEC.2017.8051418
M3 - Conference contribution
AN - SCOPUS:85032797238
T3 - 2017 10th Jordan International Electrical and Electronics Engineering Conference, JIEEEC 2017
BT - 2017 10th Jordan International Electrical and Electronics Engineering Conference, JIEEEC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Jordan International Electrical and Electronics Engineering Conference, JIEEEC 2017
Y2 - 16 May 2017 through 17 May 2017
ER -