A High-Accuracy Metric for Predicting the Power De-Rating of RF Power Amplifiers

Author

Xiangyin Zhang ; Xiaodong Zhu ; Ying Liu ; Youxi Tang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

25

Issue

5

fYear

2015

fDate

May-15

Firstpage

346

Lastpage

348

Abstract

Cubic metric (CM) is being recognized as a better alternative to determine the power de-rating of radio frequency power amplifiers (PAs) than peak-to-average power ratio (PAPR). However, in this letter our analysis shows that actually the CM is still inaccurate to predict the required PA power de-rating that satisfies the out-of-band radiation (OBR) requirement of a communication system. Further, by investigating the effect of the third-order nonlinearity of PA on the OBR, we propose a novel metric. Compared with PAPR and CM, the proposed metric has a strong correlation with the OBR, and thus it provides much higher accuracy in determining the required power de-rating of PAs, which is verified by extensive experimental results.

Keywords

radiofrequency power amplifiers; CM; OBR requirement; RF power amplifiers; communication system; cubic metric; high-accuracy metric; out-of-band radiation requirement; power derating prediction; radiofrequency PA; third-order nonlinearity; Accuracy; Measurement; Multicarrier code division multiple access; Peak to average power ratio; Polynomials; Radio frequency; Wireless communication; Cubic metric (CM); RF power amplifiers (PA); peak-to-average power ratio (PAPR); power de-rating;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2015.2409983

Filename

7070774