Efficiency enhancement by reconfigurable matching networks in LINC transmitters

EURASIP Journal on Wireless Communications and Networking

Paloma Garcia-Ducar¹  Jesus de Mingo¹  Pedro L. Carro¹  Carlos Mateo¹  Cesar Sanchez-Perez¹  Jose Ramon Perez-Cisneros¹ 

[1] Department of Electronic Engineering and Communications, Aragon Institute of Engineering Research (I3A), University of Zaragoza;

关键词: Drain efficiency;    Linear amplification with nonlinear components (LINC);    Reconfigurable matching network (RMN);    Power amplifier;   

DOI  :  10.1186/s13638-017-0873-8

来源: DOAJ

【 摘 要 】

Abstract This paper proposes the use of a transmitter based on a linear amplification with nonlinear components (LINC) architecture, in which the reconfigurable matching networks (RMNs) are included. By varying the RMN active cell number, it is possible to change the load impedance at the power amplifier (PA) output, improving the amplifier drain efficiency and therefore the efficiency of the whole system. A long-term evolution (LTE) downlink signal with a bandwidth of 1.4 MHz and a peak-to-average power ratio (PAPR) of 11.48 dB is applied in order to carry out the experiments. Results show that the use of the RMNs in a LINC architecture improves the efficiency at all tested frequencies, especially at 927 MHz reaching an enhancement of 36.50%. Regarding the distortion, the adjacent channel leakage ratio (ACLR) values increase in all cases, with an improvement of 3.5 dB at 958 MHz. Finally, in terms of error vector magnitude (EVM), the proposed architecture offers a value of 1.96% at 927 MHz.

【 授权许可】

Unknown