Summary
IEICE Information and Communication Technology Forum
2013
Session Number:COMM3
Session:
Number:COMM3-1
Adaptive Powerline Communication Systems
Haris Gacanin,
pp.-
Publication Date:2013-07-20
Online ISSN:2188-5079
Summary:
In this talk we evaluate the potential of adaptive broadband power line communications (PLC) transmission over the classical in-house powerline wires. In PLC systems an orthogonal frequency division multiplexing (OFDM) has been adopted as physical access scheme to cope with the multipath channel reflections at the receiver end. However, for coherent detection in OFDM the accurate channel estimates are required. Currently, the channel estimation (CE) schemes based on time division multiplex (TDM) and frequency division multiplex (FDM) pilots are foreseen, where the channel delay-time domain windowing is used for noise reduction (de-noising) based on the pre-defined guard interval length. We evaluate the impact of house appliances on duration of channel delay spread as well as channel behavior in the frequency domain. We also present and evaluate a mechanism for efficient CE with adaptive de-noising algorithm designed based on mean square error criteria. The method is designed to reduce the noise in the system which is exploited by channel equalizer to improve the system’s performance. The adaptive algorithm is used as a driver for the transceiver with adaptive guard interval based on the channel conditions. The algorithm performance is evaluated by computer simulation to illustrate efficiency of the adaptive PLC system.