S. Barbarossa

Publications314
h-index57
Citations13,052
Highly Influential Citations924
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Optimal designs for space-time linear precoders and decoders
We introduce a new paradigm for the design of transmitter space-time coding that we refer to as linear precoding. It leads to simple closed-form solutions for transmission over frequency-selective…
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Redundant filterbank precoders and equalizers: unification and optimal designs
TLDR
Transmitter redundancy introduced using filterbank precoders generalizes existing modulations including OFDM, DMT, TDMA, and CDMA schemes encountered with single- and multiuser communications and develops jointly optimal transmitter-receiver filterbank designs based on maximum output SNR and minimum mean-square error criteria.
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Product high-order ambiguity function for multicomponent polynomial-phase signal modeling
TLDR
The use of the PHAF offers a number of advantages with respect to the high-order ambiguity function (HAF), and removes the identifiability problem and improves noise rejection capabilities.
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Non-data-aided carrier offset estimators for OFDM with null subcarriers: identifiability, algorithms, and performance
TLDR
Identifiability issues involving high-resolution techniques that have been proposed for blind CFO estimation based on null subcarriers are investigated and new approaches that do not suffer from the lack of identifiability and adopt adaptive algorithms that are computationally feasible are proposed.
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Joint Optimization of Radio and Computational Resources for Multicell Mobile-Edge Computing
TLDR
This paper considers an MIMO multicell system where multiple mobile users ask for computation offloading to a common cloud server, and proposes an iterative algorithm, based on a novel successive convex approximation technique, converging to a local optimal solution of the original nonconvex problem.
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Optimal Linear Precoding Strategies for Wideband Noncooperative Systems Based on Game Theory—Part I: Nash Equilibria
TLDR
A decentralized strategy to find out the optimal precoding/multiplexing matrices for a multipoint-to-multipoint communication system composed of a set of wideband links sharing the same physical resources, i.e., time and bandwidth is proposed.
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Filterbank transceivers optimizing information rate in block transmissions over dispersive channels
TLDR
The inherent flexibility of the proposed transceivers is exploited to derive as special cases, zero-forcing and minimum mean-square error solutions for block based data transmissions over frequency-selective AGN channels.
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Analysis of multicomponent LFM signals by a combined Wigner-Hough transform
TLDR
The overall method is shown to be asymptotically efficient and offers a good rejection capability of the cross terms and a closed form expression is found for the signal-to-noise ratio and the parameter estimation accuracy.
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Redundant filterbank precoders and equalizers. II. Blind channel estimation, synchronization, and direct equalization
TLDR
Simulations illustrate applications to blind equalization of downlink CDMA transmissions, multicarrier modulations through channels with deep fades, and superior performance relative to CMA and existing output diversity techniques relying on multiple antennas and fractional sampling.
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Optimal Linear Precoding Strategies for Wideband Non-Cooperative Systems Based on Game Theory—Part II: Algorithms
TLDR
The main contribution is to provide sufficient conditions for the global convergence of all the proposed algorithms which, although derived under stronger constraints, incorporating for example spectral mask constraints, have a broader validity than the convergence conditions known in the current literature for the sequential iterative waterfilling algorithm.
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