DMT and FMT Systems for Wireless Applications: Performance Comparison in the Presence of Frequency Offset and Phase Noise

In this paper we presents a comparison between multi–carrier systems for wireless applications. The effects of frequency offsets and phase noise into discrete multitone and filtered multitone modulation techniques are investigated. The achievable bit rates of the different systems are evaluated via simulation of the transmission chain for various channel types. The greater spectral efficiency of the filtered multitone solution allows transmission with higher bit rates with respects to the discrete multitone solution. Systems based on filtered multitone are more robust to frequency offset than discrete multitone systems. The performance loss issignificant for high values of phase noise in both schemes.