Preamble-based channel estimation in HomePlug AV systems

Abstract

In this paper, we investigate channel estimation in the context of the orthogonal frequency division multiplexing (OFDM) based HomePlug AV system using the channel models provided by the open power-line communication European research alliance (OPERA). In particular, for increasing the system data rate efficiency, the two proposed algorithms do not make use of known OFDM symbols but exploit the synchronization preamble available at the beginning of each frame. However, the spectrum of the preamble i) contains many band gaps where data is not available and ii) in the remaining spectrum data is highly fluctuating in power. By several simulations using OPERA channel models, we will show the significant performance of the two proposed schemes, that offer a trade-off between complexity and performance.

Channel estimation for OFDM-based indoor broadband power line communication systems

“…The channel estimation problem has been largely studied in PLC. However, many published works employ signals that do not conform to the existing standards [20], [21], deal with narrowband PLC systems [22]- [24] or outdoor broadband ones [21], [25]. Channels in both scenarios exhibit notable differences with respect to indoor ones.…”