A new post distorter of WLAN amplifiers using Hammerstein filter

Author

Miar, Yasin ; Vaezi, Mojtaba ; Momen, AmirReza

Author_Institution

Islamic Azad Univ., Tehran

fYear

2005

fDate

1-4 May 2005

Firstpage

1701

Lastpage

1703

Abstract

In this paper we present an adaptive post-distortion algorithm for linearization of power amplifiers (PAs). This algorithm uses a Hammerstein filter in order to compensate the nonlinear distortions of PA, deriving the PAs inverse function. We have simulated our proposed system using advanced design system (ADS) software on an OFDM system. Simulation results for different orders of Hammerstein filter and different gains of amplifier show that the proposed system significantly decreases the mean square error (MSE) of distorted signal and improves system performance especially when the gain of amplifier rises

Keywords

OFDM modulation; mean square error methods; power amplifiers; power filters; wireless LAN; Hammerstein filter; MSE; OFDM system; WLAN amplifiers; adaptive post-distortion algorithm; advanced design system software; inverse function; mean square error; nonlinear distortion compensation; power amplifier linearization; signal distortion; Filters; Mean square error methods; Nonlinear distortion; OFDM; Performance gain; Power amplifiers; Software design; Software systems; System performance; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2005. Canadian Conference on

Conference_Location

Saskatoon, Sask.

ISSN

0840-7789

Print_ISBN

0-7803-8885-2

Type

conf

DOI

10.1109/CCECE.2005.1557310

Filename

1557310