Title :
A Novel OFDM Power Based Estimation for Dynamic Channel Tracking in Downlink LTE
Author :
Kalakech, Ali ; Brunel, Loïc ; Berbineau, Marion ; Mottier, David
Author_Institution :
Univ. Lille Nord de France, Lille, France
Abstract :
In this paper we compare and test several channel estimation algorithms in the case of LTE (Long Term Evolution) Systems applied in a high mobility environment. In particular, we propose a novel algorithm, based on the observation of OFDM block energy, to perform a semi-blind tracking of the channel between pilot blocks. This algorithm is compared to more traditional approach based on 1D estimation and interpolation. In addition, an Expectation Maximization (EM) is used to improve the overall channel estimation.
Keywords :
Long Term Evolution; OFDM modulation; channel estimation; expectation-maximisation algorithm; interpolation; mobility management (mobile radio); 1D estimation; Long Term Evolution; OFDM block energy; OFDM power based estimation; channel estimation; downlink LTE; dynamic channel tracking; expectation maximization; high mobility environment; interpolation; pilot blocks; semiblind tracking; Bit error rate; Channel estimation; Delay; Estimation; Interpolation; OFDM; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
DOI :
10.1109/VTCFall.2012.6399157
