A new digital predistortion technique for analog beamforming systems

IEICE Electronics Express

Ji-Hoon Kim²  Chan-Won Park¹  Eui-Rim Jeong³ 

[1] Energy-Harvesting IoT Research Section, IoT Convergence Research Dept., ETRI;Dept. of Electronics Engineering, Chungnam National University;Dept. of Information and Communication Engineering, Hanbat National University

关键词: analog beamforming;    power amplifier;    digital predistortion;    memory polynomial;    nonlinear distortion;   

DOI  :  10.1587/elex.13.20150998

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(10)A digital predistortion (DPD) technique to linearize multiple power amplifiers (PAs) in analog beamforming systems is proposed. The analog beamforming system considered in this paper has one digital chain and multiple PAs/antennas controlled by phase shifters. Due to the system configuration, a single DPD should linearize the multiple PAs. To design the DPD, this paper introduces a cost function, squares of the sum of errors for all the PAs. The DPD solution minimizing the cost function is found by a recursive least squares (RLS) algorithm. Experimental results with commercial PAs show that the proposed DPD can effectively linearize multiple PAs.

【 授权许可】

Unknown