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We study through analysis the joint effect of time offsets, frequency offsets, and multi-path fading in the uplink of an asynchronous multiuser system for wireless communications deploying discrete multi-tone modulation and demodulation. We derive analytical expressions for the multiple access interference, and we quantify its detrimental effects through(More)
We address the efficient realization of a filtered multitone (FMT) modulation system and its orthogonal design. FMT modulation can be viewed as a Discrete Fourier Transform (DFT) modulated filter bank (FB). It generalizes the popular orthogonal frequency division multiplexing (OFDM) scheme by deploying frequency confined subchannel pulses. We compare three(More)
—We investigate the statistics of the in-home power line communications channel in the broadband frequency range up to 300 MHz. The analysis is based on the results of an experimental measurement campaign in Italy during which we acquired more than 1300 channels. Firstly, we focus on the channel frequency response. We study the statistics of the amplitude(More)
—This paper reviews existing noise models including both background and impulsive noise for the in-home PLC scenario, highlighting similarities and differences. With reference to the impulsive noise, it is shown that a simple model, in the frequency band up to 100 MHz, can be derived by considering the noise generated at the source and taking into account(More)
—This paper deals with synchronization and channel estimation in a filtered multitone (FMT) modulated system. An FMT based system differs from the popular OFDM scheme in the deployment of sub-channel shaping filters. Although the synchronization problem in OFDM is well understood, in an FMT system it presents several challenges. The approach herein(More)
—In this paper, we present a novel transmission technology approach for application in the asynchronous multiple-access wireless channel (uplink). It is based on the concatenation of an inner filtered multitone (FMT) modulator with transmission over multiple antennas, and an outer space–time cyclically prefixed discrete multitone (ST-CP-DMT) modulator. The(More)