Title :
Comparative Analysis of Pilot-based Channel Estimators for DMT Systems Over Indoor Power-line Channels
Author :
Cortés, José Antonio ; Tonello, Andrea M. ; Díez, Luis
Author_Institution :
Univ. of Malaga, Malaga
Abstract :
This work addresses the problem of pilot-based channel estimation in DMT systems for broadband indoor power-line communications. The study is carried out over a set of measured channels. Three estimation schemes are compared: the least-squares (LS), the linear minimum mean-squared error (LMMSE) estimator and the least-mean-square (LMS) with cubic interpolation between pilot carriers. The use of a generic LMMSE design based on channel statistics derived from measurements is proposed. Performance as a function of the pilot spacing is analyzed in terms of the mean-squared error (MSE), the error probability and the attained bit-rate.
Keywords :
broadband networks; carrier transmission on power lines; channel estimation; error statistics; indoor communication; interpolation; mean square error methods; DMT systems; broadband indoor power-line communications; cubic interpolation; error probability; indoor power-line channels; least-mean-square estimation; linear minimum mean-squared error estimator; pilot-based channel estimators; Additive noise; Channel estimation; Frequency estimation; Interpolation; Land mobile radio; Least squares approximation; OFDM modulation; Performance analysis; Signal to noise ratio; Statistics; DMT; LMMSE; LMS; channel estimation; power-line communications; time-varying channel;
Conference_Titel :
Power Line Communications and Its Applications, 2007. ISPLC '07. IEEE International Symposium on
Conference_Location :
Pisa
Print_ISBN :
1-4244-1090-8
Electronic_ISBN :
1-4244-1090-8
DOI :
10.1109/ISPLC.2007.371153
