Title :
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
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;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6134307
