86 citations · 385 across the 26 of their papers we have counts for
20 papers · 1 filter
Discrete-time models and performance of phase noise channels
Amina Piemontese, Giulio Colavolpe, Thomas Eriksson
This paper deals with the phase noise affecting communication systems, where local oscillators are employed to obtain reference signals for carrier and timing synchronizations. The…
Decoding of Variable Length PLH Codes
Marco Morini, Alessandro Ugolini, Giulio Colavolpe
In this paper, we address the problem of the decoding of variable length physical layer header (PLH) codes. We take as a case study the DVB-S2X standard, and, after selecting a sui…
On the Effectiveness of OTFS for Joint Radar and Communication
Lorenzo Gaudio, Mari Kobayashi, Giuseppe Caire +1
We consider a joint radar estimation and communication system using orthogonal time frequency space (OTFS) modulation. The scenario is motivated by vehicular applications where a v…
Short Non-Binary Low-Density Parity-Check Codes for Phase Noise Channels
Tudor Ninacs, Balázs Matuz, Gianluigi Liva +1
This work considers the design of short non-binary low-density parity-check (LDPC) codes over finite fields of order m, for channels with phase noise. In particular, m-ary differen…
Single-Carrier Modulation versus OFDM for Millimeter-Wave Wireless MIMO
Stefano Buzzi, Carmen D'Andrea, Tommaso Foggi +2
This paper presents results on the achievable spectral efficiency and on the energy efficiency for a wireless multiple-input-multiple-output (MIMO) link operating at millimeter wav…
Multiuser Detection in Multibeam Satellite Systems: Theoretical Analysis and Practical Schemes
Giulio Colavolpe, Andrea Modenini, Amina Piemontese +1
We consider the rates achievable by a user in a multibeam satellite system for unicast applications, and propose alternatives to the conventional single-user symbol-by-symbol detec…
Spectral Efficiency of MIMO Millimeter-Wave Links with Single-Carrier Modulation for 5G Networks
Stefano Buzzi, Carmen D'Andrea, Tommaso Foggi +2
Future wireless networks will extensively rely upon bandwidths centered on carrier frequencies larger than 10GHz. Indeed, recent research has shown that, despite the large path-los…
Binary CPMs with Improved Spectral Efficiency
Malek Messai, Amina Piemontese, Giulio Colavolpe +2
We design new continuous phase modulation (CPM) formats which are based on the combination of a proper precoder with binary input and a ternary CPM. The proposed precoder constrain…
On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions
Andrea Modenini, Alessandro Ugolini, Amina Piemontese +1
We consider the use of multiple co-located satellites to improve the spectral efficiency of broadcast transmissions. In particular, we assume that two satellites transmit on overla…
Binary Continuous Phase Modulations Robust to a Modulation Index Mismatch
Malek Messai, Colavolpe Giulio, Amis Karine +1
We consider binary continuous phase modulation (CPM) signals used in some recent low-cost and low-power consumption telecommunications standard. When these signals are generated th…
On the Application of Multiuser Detection in Multibeam Satellite Systems
Giulio Colavolpe, Andrea Modenini, Amina Piemontese +1
We study the achievable rates by a single user in multibeam satellite scenarios. We show alternatives to the conventional symbol-by-symbol detection applied at user terminals. Sing…
Spectral Efficiency Optimization in Flexi-Grid Long-Haul Optical Systems
Tommaso Foggi, Giulio Colavolpe, Alberto Bononi +1
Flexible grid optical networks allow a better exploitation of fiber capacity, by enabling a denser frequency allocation. A tighter channel spacing, however, requires narrower filte…
Modulation Formats and Waveforms for the Physical Layer of 5G Wireless Networks: Who Will be the Heir of OFDM?
Paolo Banelli, Stefano Buzzi, Giulio Colavolpe +3
5G cellular communications promise to deliver the gigabit experience to mobile users, with a capacity increase of up to three orders of magnitude with respect to current LTE system…
On the Impact of Oscillator Phase Noise on the Uplink Performance in a Massive MIMO-OFDM System
Rajet Krishnan, M. Reza Khanzadi, N. Krishnan +4
In this work we study the effect of oscillator phase noise on the uplink performance of a massive multiple-input multiple output system. Specifically, we consider an orthogonal fre…
Time-Frequency Packing for High Capacity Coherent Optical Links
Giulio Colavolpe, Tommaso Foggi
We consider realistic long-haul optical links, with linear and nonlinear impairments, and investigate the application of time-frequency packing with low-order constellations as a p…
Algorithms for Joint Phase Estimation and Decoding for MIMO Systems in the Presence of Phase Noise
Rajet Krishnan, Giulio Colavolpe, Alexandre Graell i Amat +1
In this work, we derive the maximum a posteriori (MAP) symbol detector for a multiple-input multiple-output system in the presence of Wiener phase noise due to noisy local oscillat…
Optimal Transmit Filters for ISI Channels under Channel Shortening Detection
Andrea Modenini, Fredrik Rusek, Giulio Colavolpe
We consider channels affected by intersymbol interference with reduced-complexity, mutual information optimized, channel-shortening detection. For such settings, we optimize the tr…
Constellation Optimization in the Presence of Strong Phase Noise
Rajet Krishnan, Alexandre Graell i Amat, Thomas Eriksson +1
In this paper, we address the problem of optimizing signal constellations for strong phase noise. The problem is investigated by considering three optimization formulations, which…
Improving the Spectral Efficiency of Nonlinear Satellite Systems through Time-Frequency Packing and Advanced Processing
Amina Piemontese, Andrea Modenini, Giulio Colavolpe +1
We consider realistic satellite communications systems for broadband and broadcasting applications, based on frequency-division-multiplexed linear modulations, where spectral effic…
Nonbinary Spatially-Coupled LDPC Codes on the Binary Erasure Channel
Amina Piemontese, Alexandre Graell i Amat, Giulio Colavolpe
We analyze the asymptotic performance of nonbinary spatially-coupled low-density parity-check (SC-LDPC) codes built on the general linear group, when the transmission takes place o…