EM-Based Channel Estimation in OFDM Systems with Phase Noise

Author

Carvajal, Rodrigo ; Agüero, Juan C. ; Godoy, Boris I. ; Goodwin, Graham C.

Author_Institution

Univ. of Newcastle, Callaghan, NSW, Australia

fYear

2011

fDate

5-9 Dec. 2011

Firstpage

1

Lastpage

5

Abstract

In this paper we address the joint estimation of phase noise (PHN) and channel impulse response (CIR) in orthogonal frequency division multiplexing (OFDM) systems. We solve the estimation problem utilizing an algorithm based on a Monte Carlo (MC) implementation of the Expectation-Maximization (EM) algorithm. Our approach exploits the linear and Gaussian structure associated with the transmitted signal. We also focus on the impact that inaccurate estimation of PHN bandwidth has on the accuracy of the channel estimates. We show the benefits of the proposed algorithm via simulation studies.

Keywords

Gaussian processes; Monte Carlo methods; OFDM modulation; expectation-maximisation algorithm; phase noise; EM-based channel estimation; Gaussian structure; Monte Carlo implementation; OFDM systems; channel impulse response; expectation-maximization algorithm; linear structure; orthogonal frequency division multiplexing; phase noise; Approximation methods; Bandwidth; Channel estimation; Estimation; Monte Carlo methods; OFDM; Phase noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE

Conference_Location

Houston, TX, USA

ISSN

1930-529X

Print_ISBN

978-1-4244-9266-4

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2011.6134307

Filename

6134307