Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - New energy efficiency metric with imperfect channel considerations for OFDMA systems
AU - C. Zarakovitis, Charilaos
AU - Ni, Qiang
AU - Spiliotis, J.
PY - 2014/10/9
Y1 - 2014/10/9
N2 - Considering recent important efforts on green radio technologies this letter deliberates on imperfect channel realisations to propose a new effective-energy-efficiency metric for downlink transmissions in multi-user, multi-carrier orthogonal frequency division multiple access (OFDMA) systems. To comply with the traditional energy efficiency formula under the assumption of perfect channel knowledge available, this new metric is designed on the fractional relation between the effective throughput and the total power consumed at the transmitter. Mathematical proofs are presented to confirm such compliance in terms of the impact of the channel coefficients on the energy efficiency performance. In order to prove the property, the letter also presents a profound insight on the monotonicity of the noncentralised chi-squared distribution.
AB - Considering recent important efforts on green radio technologies this letter deliberates on imperfect channel realisations to propose a new effective-energy-efficiency metric for downlink transmissions in multi-user, multi-carrier orthogonal frequency division multiple access (OFDMA) systems. To comply with the traditional energy efficiency formula under the assumption of perfect channel knowledge available, this new metric is designed on the fractional relation between the effective throughput and the total power consumed at the transmitter. Mathematical proofs are presented to confirm such compliance in terms of the impact of the channel coefficients on the energy efficiency performance. In order to prove the property, the letter also presents a profound insight on the monotonicity of the noncentralised chi-squared distribution.
U2 - 10.1109/LWC.2014.2329697
DO - 10.1109/LWC.2014.2329697
M3 - Journal article
VL - 3
SP - 473
EP - 476
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
SN - 2162-2337
IS - 5
ER -