Title :
Impact of Linear Power Amplifier on power loading in OFDM. Part I: Principles
Author :
Wulich, Dov ; Gutman, Igor
Author_Institution :
Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
It is proposed to modify any existing power loading algorithms by linear scaling of the OFDM signal according to the maximal PAPR observed during the quasi-static period of the channel. Such scaled signal is then fed to the Linear Power Amplifier in order to use its whole linear dynamic range. It is proved that the average power to be allocated among subcarriers of the modified power loading algorithm is larger than in the standard algorithm. It is therefore expected that the modified algorithm will perform better than the standard one.
Keywords :
OFDM modulation; power amplifiers; wireless channels; OFDM signal; channel; linear dynamic range; linear power amplifier; linear scaling; maximal PAPR; power loading; quasistatic period; Artificial neural networks; Dynamic range; Loading; Optimized production technology; Peak to average power ratio; Resource management;
Conference_Titel :
Electrical and Electronics Engineers in Israel (IEEEI), 2010 IEEE 26th Convention of
Conference_Location :
Eliat
Print_ISBN :
978-1-4244-8681-6
DOI :
10.1109/EEEI.2010.5662205
