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Publications
Publications (148)
More than 50 years after the last Apollo mission, the race to the Moon has started again. In the framework of new missions, it will be of paramount importance to establish a reliable communication link between the vehicles (or astronauts) present on the Moon's surface and an Earth station. Alternative choices consider radio-frequency (RF), optical,...
As space agencies are planning manned missions to reach Mars in the next decades, researchers need to pave the way for supporting astronauts during their sojourn. The achievement of such an ambitious objective should not ignore the big issue of the substantial lack of wireless connectivity on the Mars surface. The landing of astronauts will impose...
The Internet of Things (IoT) is expected to bring new opportunities for improving several services for the Society. In this framework, massive connectivity over large geographical regions represents one of the key issues. In such scenarios, the usage of satellites might represent a viable solution for providing wide area coverage and connectivity i...
The main objective of this special is to offer the interested audience an overview of the most recent advancements in information and communication technologies that can enable the “New Space” vision, turning it from a conceptual design philosophy to real system implementation.
As space agencies are planning manned missions to reach Mars, researchers need to pave the way for supporting astronauts during their sojourn. This will also be achieved by providing broadband and low-latency connectivity through wireless network infrastructures. In such a framework, we propose a Martian deployment of a 3-Dimensional (3D) network a...
Space Agencies from all over the world are planning human missions on the Red planet in the next 20–30 years. The landing of astronauts and their sojourn on the Martian surface will impose the presence in situ of some basic supporting infrastructures. Recent research by NASA highlighted the urgent necessity of providing efficient and readily-availa...
As space agencies are planning manned missions to reach Mars, researchers need to pave the way for supporting astronauts during their sojourn. This will also be achieved by providing broadband and low-latency connectivity through wireless network infrastructures. In such a framework, we propose a Martian deployment of a 3-Dimensional (3D) network a...
A plethora of new applications will be enabled by next generation wireless networks. These demand sophisticated medium access control and physical layer (PHY) protocols in order to fulfill the requirements in terms of spectral efficiency, bit error rate (BER), energy efficiency, reliability, and security, among others. This paper develops an advanc...
The aim of the scientific community, towards the investigation of solutions able to favor a futuristic human settlement on Mars, also concerns ad hoc communication systems and wireless networks to be deployed over the “Red planet.” However, the state‐of‐the‐art appears to be missing of realistic and replicable models for understanding the radio pro...
The () is expected to bring new opportunities for improving several services for the Society, from transportation to agriculture, from smart cities to fleet management. In this framework, massive connectivity represents one of the key issues. This is especially relevant when systems are expected to cover a large geographical area or a region not re...
Internet-of-Things (IoT) represents a breakthrough for the current ICT market. In many IoT applications, sensors and actuators are distributed over very wide areas, sometimes not reached by terrestrial networks. In such scenarios, the satellite plays a significant role. In this paper, a Software-Defined Radio (SDR) -based satellite gateway for Inte...
5G networks are expected to become the main infrastructure for security verticals such as disaster relief, humanitarian aid, and governmental and defense communications. In the case of defense services, especially, there are complex areas where coverage and connectivity are not reliable or are completely absent. Thus, the deployment of drones as mo...
This article aims at introducing to the readers of the AES Magazine the recently constituted technical panel: “Glue Technologies for Space Systems.” A short overview of the technologies considered in the panel will be provided, along with panel vision and perspectives shared with the founder members. Some information about panel meetings and partic...
The exploitation of the bandwidth portions in the millimeter wave domain, namely extremely high frequencies (EHFs) will open new perspectives to future satellite services, in particular for high quality TV broadcasting and multimedia content delivery. The present work aims at surveying the opportunities and challenges of EHF exploitation for broadb...
A key point of Fifth Generation (5G) wireless networking will be the exploitation of higher frequency bands in the millimeter wave (mm-Wave) spectrum to provide unprecedented
data rates to mobile users. In such a perspective, the PHYsical (PHY) layer design priorities should be reconsidered. In this paper, we investigate Constant-Envelope Multicarr...
Future 5G systems are envisioned to support wide range of applications, from narrowband to broadband, by occupying non contiguous spectrum bands from lower sub-6GHz bands to higher millimeter wave (mmWave) bands. In this regard, significant challenges in design and implementation of 5G radio have to be addressed both in uplink and downlink. One of...
Recent developments of 5G PHY-layer technology have evidenced the advantages taken by Filter-Bank Multicarrier (FBMC) waveforms against state-of-the-art Orthogonal Frequency Division Multiplexing (OFDM) in terms of bandwidth efficiency and spectrum sharing capabilities. In this paper, we propose the use of FBMC for drone-to-earth multicast transmis...
Multi-beam satellites represent one of the enabling technologies for future terabit satellite systems. It is known that, increasing the reuse factor of frequency sub-bands, it is possible to boost multi-beam satellite capacity, provided that co-channel interference is conveniently reduced at the Earth station side. To this aim, suitable multi-user...
Millimeter wave (mm-Wave) communications has been considered as a strong candidate for future wireless standards, due to the large available bandwidth in the order of gigahertz. As a result, a plethora of future services and application-oriented scenarios can be conceived, under suitable propagation conditions. Accurate physical (PHY) layer design...
Next generation wireless standards will exploit the wide bandwidth available at
the millimeter-wave (mm-Wave) frequencies, in particular the E-band (71-76 GHz and 81-86 GHz). This large available bandwidth may be converted into multi-gigabit capacity, when efficient and computationally-affordable transceivers are designed to cope with the constrain...
In this paper, we propose and assess an mm-Wave communication system that is based on the use of constantenvelope multicarrier modulation format, namely ConstantEnvelope OFDM (CE-OFDM) : particularly, in order to establish a preliminary assessment of the affordable performance, we propose and design a Substrate Integrated Waveguide (SIW) slotted ar...
Impulse radio has been historically proposed for short-range Ultra-Wideband (UWB) transmission. However, thanks to the well-known properties of easy generation and robust detection in presence of linear and nonlinear distortions, such kind of waveforms have been considered also for long-range broadband satellite communications, in particular exploi...
Single carrier frequency divison multiple access (SCFDMA) has been proposed for the uplink of 4G mobile standards (LTE and LTE-A). LTE-A networks will be characterized by a large number of small cells (radius: 200-300 meters), exploiting multiuser Multiple Input-Multiple Output (MU-MIMO) in order to boost spectral efficiency and user capacity. The...
The backhauling will be one of the key issues for future wireless networking in the framework of LTE-A (Long Term Evolution-Advanced) standardization. 3GPP (3rd Generation Partnership Project) standardization committee has decided to study different alternative solutions for small cell backhauling, considering also broadband wireless solutions base...
Long-Term Evolution Advanced (LTE-A) will rely on the concept of 'small cell', i.e. low-power and low-cost radio base station, whose target is to provide broadband and energy-efficient coverage in residential sites and hot spot outdoor environment. Small cells will be characterized by some peculiar features that will make easier the coordination am...
LTE-A plans the adoption of cooperative relaying in order to extend coverage and improve Quality-of-Service of future-generation mobile wireless networks. Some very recent state-of-the-art contributions have studied the cooperative relaying in LTE-A from a merely theoretical viewpoint, while real experiments are needed in order to understand the im...
In this paper, an efficient FPGA implementation of a 4x4 Space-Time Block Coding (STBC) combiner for MIMO-OFDM software radio receivers is considered. The proposed combiner is based on a low-complexity algorithm which reduces the interference due to the Quasi-Orthogonality of the STBC decoding. In the literature, feedback techniques have been propo...
LTE and LTE-A have promised to provide high data rates to the end users with innovative radio techniques that
are not only power efficient but also spectral efficient. One such technique is Single Carrier Frequency Division Multiple Access (SC-FDMA), which is employed by the LTE uplink. SCFDMA can provide power efficiency to battery-limited devices...
Meeting citizens’ requirements economically and efficiently is the most important objective of Smart Cities. As a matter of fact, they are considered a key concept both for future Internet and information and communications technology. It is expected that a wide range of services will be made available for residential users (e.g. intelligent transp...
the increasing demand for broadband service delivery by satellite connections is still a challenge particularly
due to the nature of the satellite channel. Multi-carrier techniques such as OFDM, OFDMA and SC-FDMA, which have successfully been deployed in terrestrial networks to achieve broadband access, present some limitations when applied to the...
The increasing demand for broadband service
delivery by satellite connections is still a challenge particularly
due to the nature of the satellite channel. Multi-carrier
techniques such as OFDM, OFDMA and SC-FDMA, which have
successfully been deployed in terrestrial networks to achieve
broadband access, present some limitations when applied to the...
Restoring the connectivity in the emergency areas and providing NAV/COM services able to support and coordinate the rescue teams represent two of the main telecommunication needs for efficient emergency situation management. The SALICE (Satellite-Assisted LocalIzation and Communication system for Emergency services) Project aimed at identifying the...
Next generation wireless communication networks are expected to achieve ever increasing data rates. Multi-User Multiple-Input-Multiple-Output (MU-MIMO) is a key technique to obtain the expected performance, because such a technique combines the high capacity achievable using MIMO channel with the benefits of space division multiple access. In MU-MI...
Efficient exploitation of the wide bandwidth available in the EHF (extremely high frequency) domain will be a main pillar for the development of future-generation terabit satellite networks. State-of-the-art systems use spectrally-efficient coded modulations, which are based on coherent demodulation that requires the use of complex and expensive an...
During last 10 years, the use of frequencies at E-band from 71 GHz to 76 GHz, from 81 GHz to 86 GHz and from 92 GHz to 95 GHz to licensed users has been regulated in US, Europe, Australia and Japan. Due to the large amount of available bandwidth and reasonable atmospheric attenuation, these frequency bands are suitable for very high data rate radio...
The ALOHA System Research project began in September 1968, with the purpose of defining those situations where radio communications are preferable to conventional wire communications. The 802.11 WiFi wireless standard modified the CD part of the Ethernet standard to Collision Avoidance (CA) to define the CSMA/CA protocols adopted in 1997 for WiFi....
In this work, we aim at considering innovative techniques of spectrum management and radio access for emergency communications. In particular, cognitive and opportunistic radio access and resource management have been tested in emergency scenarios. The breakdown of existing wireless network infrastructures can produce a lot of big spectrum holes, i...
The optimal allocation of power and subcarrier resources in Orthogonal Frequency Division Multiple Access (OFDMA) systems represents a hot topic widely dealt with in literature, given the need to balance the tradeoff between efficiency and fairness. Current state-of-the-art solutions are suboptimal. Indeed, efficiency often privileges users that ca...
In the last years there has been a growing interest in software-defined radio communication systems (SDR). SDR technologies are attractive for communication systems because of their reconfigurable capabilities. Due to the complexity of real scenarios, usually characterized by multipath propagation and heterogeneous interfering sources, the antenna...
The implementation of efficient baseband receivers characterized by affordable computational load is a crucial point in the development of transmission systems exploiting diversity in different domains. This would be a crucial point in the future development of 4G systems, where space, time, and frequency diversity will be combined together in orde...
The exploitation of extremely high-frequency (EHF) bands (30-300 GHz) for broadband transmission over satellite links is currently a hot research topic. In particular, the Q-V band (30-50 GHz) and W-band (75-110 GHz) seem to offer very promising perspectives. This paper aims at presenting an overview of the current status of research and technology...
Some experts share their views on the existing trends and future perspectives in the fields of aerospace communications and networking. The existing trends and future perspectives in these fields are highlighted, including satellites, high-altitude platforms (HAPs), optical deep-space communications, interplanetary communications, and aircraft comm...
In the recent wireless systems, MIMO technologies are largely used to increase data throughput. Many efficient solutions have been proposed for the classical 2 transmitting and 2 receiving antennas (2×2) configuration, such as: the Spatial Multiplexing (SM) and the Alamouti's Space Time Block Coding (STBC). The extension of these techniques in term...
A balanced strategy for OFDMA radio resource allocation based on game theory concepts is presented. Its main novelty with respect to state-of-the-art methods is that resource allocation is based on application-oriented Mean Opinion Score (MOS), rather than the aggregate system data rate. Thus, users' data flows cooperate in a proactive way in order...
Today, more attention is paid to emergency systems and rescuer organizations due to the increasing sensitivity to natural disasters and terrorist attacks. In this paper, we would consider the feasibility of telecommunication technologies that can enhance the interconnection between accident zones and rescue teams. A novel philosophy inspired by Sof...
The main purpose of this work is to study the possibility of exploiting in an efficient way the large bandwidth availability of W-band (75 - 110 GHz) in order to provide an high quality HDTV broadcast service. To achieve this, we developed a simulation model of the system, following the DVB-S2 standard specifications and introducing the typical W-b...
The next generation (4G) communication technologies are explicitly designed to cope with the issues related to the deployment of broadband connections in more dynamic environments compared to the past. The desired flexibility of networks, where many operators are expected to operate at the same time on a shared spectrum chunk, emphasizes the role o...
In the EHF (extremely high frequency) domain, W-band (75-110 GHz) offers promising perspectives for future satellite communications, mainly in terms of large bandwidth availability for high-bit-rate transmission. In this work an innovative physical (PHY) layer design for broadband satellite connections operating in W-band is proposed, which is base...
In this work , the problem of multi-rate Multi-Carrier (MC) Code Division Multiple Access (CDMA) wireless transmission is addressed. In particular, we investigated the possibility of exploiting subcarrier grouping, already considered in literature for constant bit-rate MC-CDMA, in order to reduce mutual interference among different rate users and t...
Due to the high level of compression, H.264/AVC video information is very sensitive to channel errors, and in particular the Variable Length Coding applied at the encoder side, together with Motion Compensation, can amplify the effects of transmission errors during the decoding phase. If, in addition, we consider that in real time applications lost...
The proceedings contain 21 papers. The topics discussed include: a MAC protocol for cognitive radio wireless ad hoc networks; design of a robust cognitive control channel for cognitive radio networ ...
In this paper we present a design methodology and system prototyping for the baseband level of the Software Defined Radio (SDR)-based portable multi-standard terminal. The SDR-based architecture consists of three main layers denoted as: i) Upper Layer to provide communication with an end user and a network; ii) Middle Layer to establish the require...
In this paper, we propose a cooperative strategy for OFDMA radio resource allocation based on game theory. The main novelty
with respect to state-of-the-art is that the utility function considers the application-oriented Mean Opinion Score (MOS)
rather than the gross data rate attributed to each user flow. In such a scenario, data flows compete in...
In this paper, we propose an adaptive channel estimation methodology for Space-Time Block-Coded (STBC) OFDM systems, aided by nature-inspired evolutionary optimization strategies, namely: Genetic Algorithm (GA) and Particle Swarm Optimization (PSO). The use of GA and PSO allows at increasing the convergence of adaptive channel estimation to the opt...
This paper proposes an adaptive Minimum Conditional Bit-Error-Rate (MCBER) Multi-User Detector (MUD) for a Space-Time Block
Coded Multi-Carrier Code Division Multiple Access (STBC MC-CDMA) system that is based on Least-Mean-Square (LMS) optimization
algorithm. Theoretical basics and simulation results have been presented and discussed for the propo...
This paper presents preliminary evaluations about the possible adoption of de Bruijn sequences as an alternative to more conventional spreading codes in direct sequence spread spectrum automotive radars. The main advantage in using binary de Bruijn sequences relies in their huge cardinality with respect to any other family of binary sequences, at a...
The exploitation of Extremely High Frequency (EHF) bands for broadband satellite communications really represents a challenging
frontier for aerospace R&D. In few time, ALPHASAT mission (through the Technology Demonstration Payload 5) should test Q/V
band (40-50GHz) digital satellite transmission. Moreover, a lot of effort is spent to study the fea...
The proceedings contain 27 papers. The topics discussed include: physical model based interference classification and analysis; a test-based scheduling protocol (TBSP) for periodic data gathering i ...
This paper describes the SALICE (Satellite-Assisted LocalIzation and Communication systems for Emergency services) project, an Italian national research project which has been recently funded by the Italian Ministry of Research; the SALICE project aims at identifying the solutions which can be adopted in an integrated reconfigurable NAV/COM device...
In this work, we shall propose an OFDMA system based on the allocation of orthogonal subcarrier groups to multi- rate user classes. This system can be regarded as an evolution of GO-OFDMA used for single-rate data transmission. A user data stream is split into a multiple substreams, whose number depends on the user data rate. Then, each substream i...
Recently, scientific experiments are being carried out targeted to test the suitability of W-band (70-110 GHz) for the provision of broadband satellite services. W-band is a large and almost interference-free spectrum portion. For this reason, it is theoretically possible to forecast aerospace connections able at approaching the "dream value" of Gb...
In the recent years, MIMO MC-CDMA techniques have been proposed in order to increase system capacity over frequency-selective wireless channels. The key feature of MIMO MC-CDMA is the capability of exploiting diversity jointly in time, frequency and space domains. In particular, Alamouti's coding scheme has been proposed as a very simple and mathem...
W-band (75-110 GHz) is proposed nowadays as a valuable alternative to intensively-exploited Ku- and Ka-bands for high-speed transmission over satellite networks. In such a framework, some experiments are being carried out, which are targeted to verify the feasibility of exploitation of W-band for broadband service deployment. From a theoretical vie...
In this work, we are proposing a novel approach targeted to handling signal processing and data transmission tasks related to a multi-standard terminal encompassing WiMAX and UMTS standards. We shall present an innovative software-defined-radio (SDR)-based framework which will be able to arrange the digital processing tasks concerning the baseband...
The implementation of efficient baseband receivers characterized by affordable computational load is a crucial point in the development of transmission systems exploiting diversity in different domains. In this paper, we are proposing a linear multi-user detector for MIMO MC-CDMA systems with Alamouti’s Space-Time Block Coding, inspired by the conc...
In the recent years, MIMO MC-CDMA techniques have been proposed in order to increase system capacity over frequency-selective wireless channels. The key feature of MIMO MC-CDMA is the capability of exploiting diversity jointly in time, frequency and in the space domains. Very promising results have been achieved by STBC-MIMO MC-CDMA using receiver...
Emerging standards in the area of mobile services, such as Worldwide Interoperability for Microwave Access (WiMAX) and Universal Mobile Telecommunication System (UMTS), require new capabilities from mobile devices. As a result, these devices should know how to download and correctly install reconfigurable modules. For this purpose, the Software Def...
