Spectrum modelling and regrowth for 4G wireless signals

Author

Li, Xin ; Chen, B.S. ; Liu, C.M. ; Wang, X.R. ; Cho, K.R. ; Li, Fan

Author_Institution

Dept. of Electr. & Comput. Eng., Portland State Univ., Portland, OR, USA

Volume

48

Issue

4

fYear

2012

Firstpage

244

Lastpage

245

Abstract

Long term evolution (LTE) and WiMAX are the two emerging technologies dominating for the fourth generation (4G) of mobile networks. The in-band and out-of-band emission limits are specified in these two systems, however these relatively new standards still lack mathematical descriptions on spectrum regrowth. Previously, the authors analysed and predicted the spectrum regrowth caused by the nonlinearity of RF power amplifiers related to their intermodulation parameters for two OFDM based signals: Wi-Fi and digital broadcasting. In this reported work, this technology is advanced further to LTE and WiMAX signals and verified by the validity of the theoretical result derived by real experiments. This provides insight for designing power amplifier and digital predistortion in terms of out-band spectrum regrowth.

Keywords

4G mobile communication; Long Term Evolution; OFDM modulation; WiMax; intermodulation; power amplifiers; radio broadcasting; radio spectrum management; radiofrequency amplifiers; wireless LAN; 4G wireless signals; LTE; OFDM; RF power amplifiers; Wi-Fi; WiMAX; digital broadcasting; in-band emission limits; intermodulation parameters; long term evolution; out-of-band emission limits; spectrum modelling;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2011.3784

Filename

6153215