A new signal injection method with PSO for multi-carrier predistortion

IEICE Electronics Express

Jiangnan Yuan²  Xiaofang Wu¹  Yun Xu¹  Wei Wang¹ 

[1] School of Information Science and Technology, Xiamen University;School of Photoelectricity and Communication Engineering, Xiamen University of Technology

关键词: signal injection;    particle swarm optimization;    power amplifier;    digital predistortion;   

DOI  :  10.1587/elex.10.20130595

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)In multi-carrier transmitters, nonlinear characteristic of power amplifiers (PAs) results in intra-band distortion and inter-band distortion. The intra-band distortion exists in most single-carrier transmitters as well, and can be removed by traditional digital predistortion (DPD) techniques. However, the inter-band distortion is rather unique for the multi-carrier linearization. A channel-selective multi-cell DPD architecture which deals with the intra-band and inter-band distortion separately is used in this paper. Furthermore, a new signal injection method with particle swarm optimization (PSO) is proposed to suppress the inter-band distortion in the paper. The injected inter-band signals are firstly reconstructed by a memory polynomial DPD, and then their amplitude and phase are fine-tuned by a PSO algorithm. Simulation results show that the method restrains inter-band distortion significantly and accelerates the convergence speed of PSO algorithm.

【 授权许可】

Unknown