Title :
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
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;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2409983
