Methods for mitigating inter-carrier interference caused by power amplifier transient in LTE modem

IEICE Electronics Express

Ilnam Cho¹  Hyukjin Chae¹  Dong Ku Kim² 

[1] Advanced Communication Technology Lab., LG Electronics;Electrical and Electronic Engineering Department, Yonsei University

关键词: power amplifier;    OFDM;    inter-carrier interference;    pre-distortion;    equalization;    LTE;   

DOI  :  10.1587/elex.12.20141177

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(11)Power amplifier transient of LTE modem is discussed. In current LTE specification, the requirement of power amplifier transient period for LTE modem is within 40 µs. Under this requirement, non-negligible inter-carrier interference (ICI) can be observed for both of normal cyclic prefix (CP) (= 4.7 µs) and extended CP (= 16.7 µs). We analyze the ICI in terms of the transient response of power amplifier and propose ICI mitigation schemes: 1) digital pre-distortion at transmitter 2) low complexity multi-tap equalization at receiver based on the ICI analysis.

【 授权许可】

Unknown