The influence of modulation rate on energy efficiency (EE) for a source-relayterminal communication link using the amplify-and-forward (AF) protocol and MQAM is studied given a prescribed error rate (BER). Transmission power consumption is calculated. The total power consumption is obtained when the circuit power consumption is taken into account. An expression of EE is derived, and the influence of modulation rate on EE studied. Simulation results show that, with the modulation rate increasing, energy efficiency increases first, and then decreases.
CHEN Fang-fang, WANG Tao
. Impact of Modulation Rate on Energy Efficiency of Amplify-and-Forward Relay Transmission Links[J]. Journal of Applied Sciences, 2016
, 34(1)
: 22
-29
.
DOI: 10.3969/j.issn.0255-8297.2016.01.003
[1] Tse D, Viswanath P. Fundamentals of wireless communication[J]. Eth Zürich Lecture Script, 2005, 3(5):B6-1-B6-5.
[2] Nabar R U, Bolcskei H, Kneububler F W. Fading relay channels:performance limits and space-time signal design[J]. Selected Areas in Communications, 2004, 22(6):1099-1109.
[3] Ribeiro A, Cai X, Giannakis G B. Symbol error probabilities for general cooperative links[C]//IEEE International Conference on Communications, 2004, 6(3):3369-3373.
[4] Li G Y, Xu Z, Xiong C, Yang C, Zhang S, Chen Y, Xu S. Energy efficient wireless communications:tutorial, survey, and open issues[J]. IEEE Wireless Communications, 2011, 18(6):28-35.
[5] Laneman J N, Tse D N C, Wornell W G. Cooperative diversity in wireless networks:efficient protocols and outage behavior[J]. IEEE Transactions on Information Theory, 2004, 50(12):3062-3080.
[6] Isheden C, Fettweis G P. Energy-efficient multi-carrier link adaptation with sumrate-depent circuit power[C]//IEEE Global Telecommunications Conference, 2010:1-6.
[7] Howard S L, Schlegel C, Iniewski K. Error control coding in low-power wireless sensor networks:when is ECC energy-efficient?[J]. EURASIP Journal on Wireless Communications and Networking, 2006(2):29-29.
[8] Verdu S. Spectral efficiency in the wideband regime[J]. IEEE Transactions on Information Theory, 2002, 48(6):1319-1343.
[9] Wu M, Wubben D, Dekorsy A. BER-based power allocation for amplify-and-forward and decode-and-forward relaying systems[J]. Smart Antennas International ITGWorkshop on, 2011:1-8.
[10] Wang T, Vandendorpe L. On the optimum energy efficiency for flat-fading channels with rate-dependent circuit power[J]. IEEE Transactions on Communications, 2013, 61(12):4910-4921.
[11] Can S, Chen Y Y. Energy efficiency comparison among direct, one-way and two-way relay transmission[C]//IEEE International Conference on Communications, 2012:4288-4293.
[12] Chung S T, Goldsmith A J. Degrees of freedom in adaptive modulation:a unified view[J]. IEEE Transactions on Communications, 2001, 49(9):1561-1571.
[13] Cui S, Goldsmith A, Bahai A. Energy-constrained modulation optimization[J]. IEEE Transactions on Wireless Communications, 2005, 4(5):2349-2360.
[14] Amold O, Richter F, Fettweis G P, Blume O. Power consumption modeling of different base station types in heterogeneous cellular networks[C]//Future Network & Mobile Summit, 2010:1-8.
[15] Boyd S, Vandenberghe L. Convex optimization[J]. IEEE Transactions on Automatic Control, 2006, 51(11):1859.
