Title :
Linear and periodically time-varying PLC channels estimation in the presence of impulsive noise
Author :
Picorone, Antônio Ângelo Missiaggia ; Amado, Laryssa Ramos ; Ribeiro, Moisés Vidal
Author_Institution :
Dept. of Electr. Eng., Fed. Univ. of Juiz de Fora, Juiz de Fora, Brazil
Abstract :
This work aims to analyze and discuss the performance of channel estimation techniques based on OFDM pilot signals, applied to data transmission over PLC (power line communication) channels. PLC channel is modeled as linear and periodically time-varying (LPTV), which presents an additive impulsive Gaussian-like noise (AIGN). Non-adaptive channel estimators, such as Least Square and Transform Domain associated with channel equalizers based on minimum mean squared error criterion and adaptive ones, such as LMS and RLS are investigated. Simulation results indicate interesting research directions to improve estimation techniques based on pilot signals when LPTV PLC channels are corrupted by AIGN, such as i) adaptive channel estimation techniques suffer considerable performance degradation due to periodically-stationary behavior of PLC channel, and ii) the periodically-stationarity of PLC channel can causes more performance degradation than the impulsive noise.
Keywords :
AWGN; OFDM modulation; carrier transmission on power lines; data communication; impulse noise; least squares approximations; OFDM; PLC channels; additive impulsive Gaussian-like noise; channels estimation; data transmission; least square; power line communication; time-varying PLC; transform domain; Additive noise; Channel estimation; Data communication; Degradation; Least squares approximation; OFDM; Performance analysis; Power line communications; Programmable control; Signal analysis;
Conference_Titel :
Power Line Communications and Its Applications (ISPLC), 2010 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-5009-1
Electronic_ISBN :
978-1-4244-5010-7
DOI :
10.1109/ISPLC.2010.5479915
