Aliasing and inter-channel interference impact on the performance of multi-channel OFDM-UWB distribution in FTTH networks

Abstract

The influence of aliasing components and inter-channel interference on the multi-channel binary phase-shift keying (BPSK) orthogonal frequency division multiplexing (OFDM) ultra-wide band (UWB) radio signals performance in fibre-to-the-home (FTTH) networks is evaluated through numerical simulation. It is shown performance degradation exceeding 1 dB when a low-pass filter (LPF) at the transmitter output is used to reduce the aliasing components intensity. However, in the absence of the LPF, a considerable performance variation between OFDM-UWB channels occurs due to inter-channel interference resulting from the aliasing components. Instead, when the LPF is used to decrease the aliasing components intensity, the performance of each OFDM-UWB channel is the same as the one obtained in single-channel operation.