Antonio Assalini

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In this letter, we propose two new Nyquist (intersymbol interference free) pulses that exhibit better error probability performance in the presence of sampling errors than the popular raised-cosine and a recently proposed pulse by Beaulieu, Tan, and Damen. The new pulses are also robust to the root and truncation operations.
In this paper we consider the problem of acquiring time and frequency synchronization in a filtered multitone (FMT) modulated system. An FMT based system differs from the popular OFDM system 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. A(More)
In this paper, we study the effects of phase noise in a multicarrier system. We show that the phase noise introduces interference components, and we evaluate their second order statistics. The analysis is then applied to two particular multicarrier architectures: discrete multitone (DMT) modulation, and filtered multitone (FMT) modulation. For the DMT case(More)
This paper presents a low-complexity/low-latency algorithm for estimating and tracking time-varying fading channels in Orthogonal Frequency Division Multiplexing (OFDM) systems. More specifically, it is described a decision directed (DD) channel estimation (CE) method, consisting of two main steps: 1) Data detection of the current received OFDM symbol is(More)
The robustness of the linear minimum mean square error (LMMSE) channel estimator is studied with respect to the reliability of the estimated channel correlation matrix used for its implementation. The analysis is of interest in practical applications of multiple-input multiple-output (MIMO) systems, where a perfect estimate of the channel correlation matrix(More)
This paper deals with the impact of channel estimation errors on the capacity of correlated fading MIMO channels. In literature the effect of channel uncertainty at the receiver is often investigated with the assumption that channel estimation errors are identically distributed and independent of both SNR and channel correlation values. In this paper we(More)
We describe a transmission technology approach that is suited for application to high-speed asynchronous multiuser wireless channels, i.e., reverse WLAN/cellular links. The scheme is based on concatenated multitone modulation and multiplexing. The design parameters are flexible and are chosen to cope with the users' time and frequency offsets, as well as(More)