An Approach to Peak-to-Average Power Ratio in WFMT System

摘要

In presented paper we discuss a Peak to Average Power Ratio (PAR) in communication systems that used a novel WFMT modulation. A Wavelet based Filtered Multi-Tone (WFMT) modulation was developed as alternative line code for xDSL system and represent future extending of OFDM/DMT technologies. Because of its multicarrier nature, the WFMT modulation is good suited to carry high-speed data over wideband channel. The major drawback of multicarrier system is the large PAR of the transmit signal, which makes a straightforward implementation costly and inefficient. In this paper, we examine PAR characteristics of WFMT modulation. A simple expression for PAR is developed, as for circular so for square constellation diagram of QAM signal. The results illustrate significant better PAR characteristics of the WFMT versus OFDM.