Title :
Impact of efficient power amplifiers in wireless access
Author :
Hossain, M.M.A. ; Jäntti, Riku
Author_Institution :
Dept. of Commun. & Networking, Aalto Univ., Espoo, Finland
Abstract :
Energy consumption of next generation radio access network is posing a deep impact on CO2 emission and network operating cost. In a macro site, radio equipment dominates the power consumption. Specifically, the power amplifiers consume 70% of the total input power. In case of WCDMA and OFDMA, the Traditional Power Amplifier (TPA) suffers from low efficiency due to the non-constant envelope signals. To improve efficiency in case of these kinds of signals, deployment of Envelope Tracking Power Amplifier (ET-PA) is a viable solution. In this paper, the efficiency vs. output power characteristics of the ET-PA has been modeled. Moreover, by carrying out system level simulation in WCDMA network scenario, we show that 7-15% energy can be saved by replacing TPA by ET-PA.
Keywords :
OFDM modulation; air pollution control; code division multiple access; frequency division multiple access; power amplifiers; radio access networks; CO2; CO2 emission; OFDMA; WCDMA network; energy consumption; envelope tracking power amplifier; network operating cost; next generation radio access network; nonconstant envelope signals; power amplifiers; power consumption; radio equipment; system level simulation; wireless access network; Energy consumption; Equations; Mathematical model; Multiaccess communication; Power amplifiers; Power generation; Spread spectrum communication; Comparisons; Energy Efficiency; Modeling; Power Amplifier Efficinecy;
Conference_Titel :
Online Conference on Green Communications (GreenCom), 2011 IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-9518-4
DOI :
10.1109/GreenCom.2011.6082504
