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Luca Reggiani
DEIB - Politecnico di Milano, Milano, 20133, Italy

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Journal article
Published: 12 February 2021 in Physical Communication
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In order to cancel the interference arising between the two signals transmitted over the horizontal and the vertical polarizations of the electrical field in pol-mux transmission, the coefficients of the channel matrix must be estimated. However, when the coefficients are fast time-varying, to estimate or, better, to track them becomes challenging, especially if the estimation is non-data-aided. This paper shows that a non-data-aided particle filter can be used to track the time-varying coefficients. Also, in the paper the weights and the states of the particles are used in a forward–backward scheme in order to demodulate the signal and get the probability distribution of the transmitted modulation symbols. Computer simulations are presented for validating the proposed method.

ACS Style

L. Reggiani; A. Spalvieri; L. Dossi. Tracking the pol-mux channel by a particle filter. Physical Communication 2021, 46, 101286 .

AMA Style

L. Reggiani, A. Spalvieri, L. Dossi. Tracking the pol-mux channel by a particle filter. Physical Communication. 2021; 46 ():101286.

Chicago/Turabian Style

L. Reggiani; A. Spalvieri; L. Dossi. 2021. "Tracking the pol-mux channel by a particle filter." Physical Communication 46, no. : 101286.

Journal article
Published: 23 November 2020 in Sensors
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In scenarios, like critical public safety communication networks, On-Scene Available (OSA) user equipment (UE) may be only partially connected with the network infrastructure, e.g., due to physical damages or on-purpose deactivation by the authorities. In this work, we consider multi-hop Device-to-Device (D2D) communication in a hybrid infrastructure where OSA UEs connect to each other in a seamless manner in order to disseminate critical information to a deployed command center. The challenge that we address is to simultaneously keep the OSA UEs alive as long as possible and send the critical information to a final destination (e.g., a command center) as rapidly as possible, while considering the heterogeneous characteristics of the OSA UEs. We propose a dynamic adaptation approach based on machine learning to improve a joint energy-spectral efficiency (ESE). We apply a Q-learning scheme in a hybrid fashion (partially distributed and centralized) in learner agents (distributed OSA UEs) and scheduler agents (remote radio heads or RRHs), for which the next hop selection and RRH selection algorithms are proposed. Our simulation results show that the proposed dynamic adaptation approach outperforms the baseline system by approximately 67% in terms of joint energy-spectral efficiency, wherein the energy efficiency of the OSA UEs benefit from a gain of approximately 30%. Finally, the results show also that our proposed framework with C-RAN reduces latency by approximately 50% w.r.t. the baseline.

ACS Style

Muhidul Islam Khan; Luca Reggiani; Muhammad Mahtab Alam; Yannick Le Moullec; Navuday Sharma; Elias Yaacoub; Maurizio Magarini. Q-Learning Based Joint Energy-Spectral Efficiency Optimization in Multi-Hop Device-to-Device Communication. Sensors 2020, 20, 6692 .

AMA Style

Muhidul Islam Khan, Luca Reggiani, Muhammad Mahtab Alam, Yannick Le Moullec, Navuday Sharma, Elias Yaacoub, Maurizio Magarini. Q-Learning Based Joint Energy-Spectral Efficiency Optimization in Multi-Hop Device-to-Device Communication. Sensors. 2020; 20 (22):6692.

Chicago/Turabian Style

Muhidul Islam Khan; Luca Reggiani; Muhammad Mahtab Alam; Yannick Le Moullec; Navuday Sharma; Elias Yaacoub; Maurizio Magarini. 2020. "Q-Learning Based Joint Energy-Spectral Efficiency Optimization in Multi-Hop Device-to-Device Communication." Sensors 20, no. 22: 6692.

Journal article
Published: 29 April 2020 in Physical Communication
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Existing public safety networks (PSNs) are not designed to cope with disasters such as terrorist attacks, consequently leading to long delays and intolerable response times. First responders’ life threats when accessing the attacked zone are more severe in comparison to other disasters and the accuracy of basic information such as the number of terrorists, the number of trapped people, their locations and identity, etc., is vital to the reduction of the response time. Recent technologies for PSNs are designed to manage natural disaster scenarios; these are not best suited for situations like terrorist attacks because a proper communication infrastructure is required for operating most of the classical PSNs. This serious concern makes it highly desirable to develop reliable and adaptive pervasive public safety communication technologies to counter such a kind of emergency situation. Device-to-device (D2D) communication can be a vital paradigm to design PSNs that are fit for dealing with terrorist attacks thanks to long-term evolution (LTE)-sidelink, which could allow the devices that people carry with themselves in the attacked zone to communicate directly. To our best knowledge, this is the first survey paper on public safety communication in the context of terrorist attacks. We discuss PSN scenarios, architectures, 3rd generation partnership project (3GPP) standards, and recent or ongoing related projects. We briefly describe a system architecture for disseminating the critical information, and we provide an extensive literature review of the technologies that could have a significant impact in public safety scenarios especially in terrorist attacks, such as beamforming and localization for unmanned aerial vehicles (UAVs), LTE sidelink for both centralized (base-station assisted) and decentralized (without base-station) architectures, multi-hop D2D routing for PSN, and jamming and anti-jamming in mobile networks. Furthermore, we also cover the channel models available in the literature to evaluate the performance of D2D communication in different contexts. Finally, we discuss the open challenges when applying these technologies for PSN.

ACS Style

Ali Masood; Davide Scazzoli; Navuday Sharma; Yannick Le Moullec; Rizwan Ahmad; Luca Reggiani; Maurizio Magarini; Muhammad Mahtab Alam. Surveying pervasive public safety communication technologies in the context of terrorist attacks. Physical Communication 2020, 41, 101109 .

AMA Style

Ali Masood, Davide Scazzoli, Navuday Sharma, Yannick Le Moullec, Rizwan Ahmad, Luca Reggiani, Maurizio Magarini, Muhammad Mahtab Alam. Surveying pervasive public safety communication technologies in the context of terrorist attacks. Physical Communication. 2020; 41 ():101109.

Chicago/Turabian Style

Ali Masood; Davide Scazzoli; Navuday Sharma; Yannick Le Moullec; Rizwan Ahmad; Luca Reggiani; Maurizio Magarini; Muhammad Mahtab Alam. 2020. "Surveying pervasive public safety communication technologies in the context of terrorist attacks." Physical Communication 41, no. : 101109.

Research article
Published: 15 January 2019 in Wireless Communications and Mobile Computing
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In order to leverage the spectrum resources, several forms of wireless duplex have been introduced and investigated in recent years. In Partial Duplex (PD) schemes, part of the band is transmitted in Full-Duplex (FD) and the rest in Half-Duplex (HD); therefore, some transmitted symbols will be characterized, at the receiver, by high SNR (Signal-to-Noise Ratio) and others by low SNR because of the residual self-interference (SI) in the FD part. Combining properly the patterns of these high and low SNR symbols affects the performance of the encoding schemes used in the system; in order to overcome this issue, different encoding and allocation schemes can be adopted for achieving a satisfactory solution. This paper investigates the performance of Low-Density Parity-Check (LDPC), turbo, polar codes for wireless PD. Orthogonal Frequency Division Multiplexing (OFDM) is an efficient multicarrier modulation technique, used in 4G and in the upcoming 5G, and it can be exploited for realizing a proper symbol allocation according to the SNR on each subcarrier. In this context, performance of LDPC, polar, and turbo codes derived from existing specifications has been studied when the system faces a mixture of high and low SNRs on the bits and hence on the symbols coming from the same codeword and this unbalanced SNR distribution is known a-priori at the transmitter, a condition associated with a scheme in which part of the symbols is subject to FD interference.

ACS Style

Hamid R. Barzegar; Luca Reggiani. Channel Coding for Multi-Carrier Wireless Partial Duplex. Wireless Communications and Mobile Computing 2019, 2019, 1 -13.

AMA Style

Hamid R. Barzegar, Luca Reggiani. Channel Coding for Multi-Carrier Wireless Partial Duplex. Wireless Communications and Mobile Computing. 2019; 2019 ():1-13.

Chicago/Turabian Style

Hamid R. Barzegar; Luca Reggiani. 2019. "Channel Coding for Multi-Carrier Wireless Partial Duplex." Wireless Communications and Mobile Computing 2019, no. : 1-13.

Journal article
Published: 17 December 2018 in EURASIP Journal on Wireless Communications and Networking
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A hybrid transmission method between classical half-duplex and full-duplex is here considered for point-to-point orthogonal frequency division multiplexing (OFDM) links experiencing frequency selective fading. This partial-duplex solution uses only a portion of the available bandwidth for full-duplex transmission. It aims to increase the overall bidirectional system rate w.r.t. an equivalent half-duplex system, relaxing at the same time the high self-interference cancelation requirements that practical full-duplex systems have to provide. In this paper, we analyze the regions of self-interference cancelation values where partial-duplex systems outperform half-duplex ones in terms of achievable spectral efficiency. We investigate the potential of the proposed hybrid method by deriving the analytical distributions of the spectral efficiency gain regions in the presence of frequency selective Rayleigh fading. For different strategies in the selection of the sub-carriers that operate in full-duplex, we highlight the role of the different parameters involved and the peculiarity of this system in terms of design flexibility.

ACS Style

Hamid R. Barzegar; Luca Reggiani; Laura Dossi. Capacity gain and design trade-offs for partial-duplex OFDM wireless communications. EURASIP Journal on Wireless Communications and Networking 2018, 2018, 288 .

AMA Style

Hamid R. Barzegar, Luca Reggiani, Laura Dossi. Capacity gain and design trade-offs for partial-duplex OFDM wireless communications. EURASIP Journal on Wireless Communications and Networking. 2018; 2018 (1):288.

Chicago/Turabian Style

Hamid R. Barzegar; Luca Reggiani; Laura Dossi. 2018. "Capacity gain and design trade-offs for partial-duplex OFDM wireless communications." EURASIP Journal on Wireless Communications and Networking 2018, no. 1: 288.

Journal article
Published: 03 October 2018 in Optics Express
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Pol-Mux transmission is a well established technique that enhances spectral efficiency by simultaneously transmitting over horizontal and vertical polarizations of the electrical field. However, cross-coupling of the two polarizations impairs transmission. Under the assumption that the cross-coupling matrix is a Markov process with free-running state, we propose upper and lower bounds to the information rate that can be transferred through the channel. Simulation results show that the two bounds are tight for values of the cross-coupling power of practical interest and modulation formats up to 16-QAM (quadrature amplitude modulation).

ACS Style

Arnaldo Spalvieri; Luca Reggiani; Laura Dossi. Upper and lower bounds to the information rate transferred through the Pol-Mux channel. Optics Express 2018, 26, 27118 -27126.

AMA Style

Arnaldo Spalvieri, Luca Reggiani, Laura Dossi. Upper and lower bounds to the information rate transferred through the Pol-Mux channel. Optics Express. 2018; 26 (21):27118-27126.

Chicago/Turabian Style

Arnaldo Spalvieri; Luca Reggiani; Laura Dossi. 2018. "Upper and lower bounds to the information rate transferred through the Pol-Mux channel." Optics Express 26, no. 21: 27118-27126.

Journal article
Published: 10 January 2018 in IEEE Communications Letters
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The Kalman filter is proposed here to track the phase noise introduced by independent transmit and receive oscillators in multiple-input multiple-output transmission. To take advantage of pilot symbols that are transmitted before and after the time instant where one wants to estimate the vector of phases, a forward-backward Kalman filter is proposed. To reduce the complexity of the Kalman filter, suboptimal methods are introduced and their performance is compared to that of the full complexity Kalman filter by computer simulation.

ACS Style

Luca Reggiani; Laura Dossi; Luca Barletta; Arnaldo Spalvieri. Extended Kalman Filter for MIMO Phase Noise Channels With Independent Oscillators. IEEE Communications Letters 2018, 22, 1200 -1203.

AMA Style

Luca Reggiani, Laura Dossi, Luca Barletta, Arnaldo Spalvieri. Extended Kalman Filter for MIMO Phase Noise Channels With Independent Oscillators. IEEE Communications Letters. 2018; 22 (6):1200-1203.

Chicago/Turabian Style

Luca Reggiani; Laura Dossi; Luca Barletta; Arnaldo Spalvieri. 2018. "Extended Kalman Filter for MIMO Phase Noise Channels With Independent Oscillators." IEEE Communications Letters 22, no. 6: 1200-1203.

Conference paper
Published: 01 January 2018 in 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC)
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The 5th generation of cellular networks (5G) will provide high speed and high-availability wireless links for communication between mobile users. The usage of aerial platforms as base stations has been recently proposed to meet the above requirements, especially in densely-packed urban areas. To make an accurate prediction of the performance in such a communication system the availability of suitable channel models is a fundamental requirement. Here, we concentrate on a simple path loss and shadow fading channel model that is commonly used to describe the propagation between an aerial base station and a user on the ground. A commercial 3D ray-tracing simulator is used to extract the main parameters used in the model and the Line of Sight/Non Line of Sight probabilities as a function of the transmitter height and elevation angle. We consider three reference scenarios: Suburban, Urban and Urban High Rise generated according to ITU-R specifications. As a novel contribution, we also show simulation results for the spatial correlation of the received signal in the three considered scenarios.

ACS Style

Navuday Sharma; Maurizio Magarini; Laura Dossi; Luca Reggiani; Roberto Nebuloni. A study of channel model parameters for aerial base stations at 2.4 GHz in different environments. 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC) 2018, 1 -6.

AMA Style

Navuday Sharma, Maurizio Magarini, Laura Dossi, Luca Reggiani, Roberto Nebuloni. A study of channel model parameters for aerial base stations at 2.4 GHz in different environments. 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC). 2018; ():1-6.

Chicago/Turabian Style

Navuday Sharma; Maurizio Magarini; Laura Dossi; Luca Reggiani; Roberto Nebuloni. 2018. "A study of channel model parameters for aerial base stations at 2.4 GHz in different environments." 2018 15th IEEE Annual Consumer Communications & Networking Conference (CCNC) , no. : 1-6.

Conference paper
Published: 01 October 2017 in 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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Low-density parity-check (LDPC) code is one of the fundamental error correction techniques used in wireless networks for achieving low probabilities of error. Wireless full-duplex (FD), according to its inherent nature, faces a considerable self-interference, which cannot be cancelled completely at the FD receivers. LDPC codes are excellent candidates for enabling full duplex in the presence of residual self-interference. This paper studies performance of a class of LDPC codes when the system faces a mixture of high and low bit SNR in the same codeword, condition associated with a scheme in which part of the bits is subject to FD interference (partialduplex scheme). In partial duplex (PD) schemes, part of the band is transmitted in FD and the rest in half-duplex and, consequently, some transmitted bits will be characterized by high SNR and the others by low SNR according to a pattern which is known, a-priori, by the system. Combining properly the patterns of these high and low SNR bits affects the coding performance of the system. In this study, we show the performance achieved by different strategies for allocating low SNR bits in the codeword of LDPC codes derived and adapted by the DVB-S2 standard.

ACS Style

Hamid R. Barzegar; Luca Reggiani. LDPC encoding for partial-duplex wireless communication. 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) 2017, 1 -5.

AMA Style

Hamid R. Barzegar, Luca Reggiani. LDPC encoding for partial-duplex wireless communication. 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). 2017; ():1-5.

Chicago/Turabian Style

Hamid R. Barzegar; Luca Reggiani. 2017. "LDPC encoding for partial-duplex wireless communication." 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) , no. : 1-5.

Proceedings article
Published: 01 August 2017 in 2017 International Symposium on Wireless Communication Systems (ISWCS)
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In general, current wireless system, either for area networks or point-to-point links, cannot transmit and receive signals in both directions in the same frequency band and at the same time because of the extremely high self-interference, which annihilates the desired signal, making the use of half-duplex methods strictly necessary. In order to achieve full-duplex wireless communications, it is crucial to develop extremely efficient methods for self-interference cancellation and some recent studies in the literature have introduced novel architectures for addressing this challenging issue. This paper investigates a form of partial-duplex in wireless communication, which implies the use of just a portion of the available spectrum for full duplex transmission and reception. The rationale behind this approach is to limit the level of self-interference, relaxing the constraints on the echo canceler design in order to increase the distance range between transmitter and receiver. Therefore, in this study, we present results regarding the mitigation of the self-interference canceler requirements, which can be exploited for extending the range of FD communication in point-to-point links.

ACS Style

Hamid R. Barzegar; Luca Reggiani; Laura Dossi. Extending the range of full-duplex radio with multi-carrier partial overlapping. 2017 International Symposium on Wireless Communication Systems (ISWCS) 2017, 360 -365.

AMA Style

Hamid R. Barzegar, Luca Reggiani, Laura Dossi. Extending the range of full-duplex radio with multi-carrier partial overlapping. 2017 International Symposium on Wireless Communication Systems (ISWCS). 2017; ():360-365.

Chicago/Turabian Style

Hamid R. Barzegar; Luca Reggiani; Laura Dossi. 2017. "Extending the range of full-duplex radio with multi-carrier partial overlapping." 2017 International Symposium on Wireless Communication Systems (ISWCS) , no. : 360-365.

Proceedings article
Published: 22 December 2016 in 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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This paper considers the interference mitigation problem in multi-cell networks based on Orthogonal Frequency-Division Multiple Access (OFDMA). The approaches studied here rely on allocation algorithms exploiting base stations cooperation achieved by means of inter-cell interference information sharing. Our emphasis is concentrated on the terminals at the cell edge since, obviously, they are more affected and limited by interference. The paper presents results on several schemes of cooperation (centralized, semi-distributed, coordinated-distributed) combined with allocation algorithms characterized by the awareness of interference relations among users, achieved sharing channel state information among base stations in a typical multi-cell layout. The interference relations are revealed by processing particular graphs, either for partial frequency reuse or soft frequency reuse schemes. So the network realizes, in several forms, a dynamic fractional frequency reuse and the study highlights the main advantages of the best strategies in terms of cooperation and resource allocation.

ACS Style

Marco Schito; Hamid R. Barzegar; Luca Reggiani. Resource allocation with interference information sharing in multi-carrier networks. 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) 2016, 1 -6.

AMA Style

Marco Schito, Hamid R. Barzegar, Luca Reggiani. Resource allocation with interference information sharing in multi-carrier networks. 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). 2016; ():1-6.

Chicago/Turabian Style

Marco Schito; Hamid R. Barzegar; Luca Reggiani. 2016. "Resource allocation with interference information sharing in multi-carrier networks." 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) , no. : 1-6.

Research article
Published: 05 October 2015 in International Journal of Distributed Sensor Networks
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The proliferation of wireless communications systems poses new challenges in terms of coexistence between heterogeneous devices operating within the same frequency bands. In fact, in case of high-density concentration of wireless devices, like indoor environments, the network performance is typically limited by the mutual interference among the devices themselves, such as for wireless local area networks (WLANs). In this paper, we analyze a protocol strategy for managing multiple access in wireless networks. A network of sensors colocated with the WLAN terminals forms a control layer for managing the medium access and scheduling resources in order to limit collisions and optimize the WLAN data traffic; this control layer is based on a low-power wideband technology characterized by interference robustness, like CDMA (code division multiple access) or UWB (ultra-wideband) for sensors. In this work, we perform an analytical and simulative performance study of the saturated throughput, showing numerical results for the UWB-IR (Impulse Radio) sensors case and highlighting the advantage that can be provided particularly in very high capacity systems, which constitute the necessary evolution of current WLAN versions.

ACS Style

Luca Reggiani; Andrea Gola; Gian Mario Maggio; Gianluigi Tiberi. Design of Interference-Resilient Medium Access for High Throughput WLANs. International Journal of Distributed Sensor Networks 2015, 2015, 1 -13.

AMA Style

Luca Reggiani, Andrea Gola, Gian Mario Maggio, Gianluigi Tiberi. Design of Interference-Resilient Medium Access for High Throughput WLANs. International Journal of Distributed Sensor Networks. 2015; 2015 ():1-13.

Chicago/Turabian Style

Luca Reggiani; Andrea Gola; Gian Mario Maggio; Gianluigi Tiberi. 2015. "Design of Interference-Resilient Medium Access for High Throughput WLANs." International Journal of Distributed Sensor Networks 2015, no. : 1-13.

Journal article
Published: 30 January 2015 in Wireless Personal Communications
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The ambitious capacity and pervasiveness requirements for future broadband wireless networks pose new challenges in the design of high capacity point-to-point (PtP) wireless microwave backhaul links. Multiple input multiple output (MIMO) architectures are the main solution for multiplying the wireless links capacity and their effectiveness has been already demonstrated in the PtP case, where channel propagation is dominated by the line-of-sight (LoS) component. In this paper we investigate the impact and performance of suppression methods for one of the main impairments in these systems, i.e. phase noise. In LoS-MIMO systems, the phase noise impact increases as the channel matrix leaves the orthogonality condition, in order to achieve practical antenna spacings and link distances. Here architectures for phase noise suppression based on pilots patterns are compared and discussed for the LoS-MIMO \((2 \times 2)\) system, revealing the advantages and numerical performance of the design options.

ACS Style

Luca Reggiani; Gaudenzio Filiberti; Laura Dossi. Phase Noise Suppression in MIMO LoS Systems for High Capacity Backhauling. Wireless Personal Communications 2015, 82, 1931 -1953.

AMA Style

Luca Reggiani, Gaudenzio Filiberti, Laura Dossi. Phase Noise Suppression in MIMO LoS Systems for High Capacity Backhauling. Wireless Personal Communications. 2015; 82 (3):1931-1953.

Chicago/Turabian Style

Luca Reggiani; Gaudenzio Filiberti; Laura Dossi. 2015. "Phase Noise Suppression in MIMO LoS Systems for High Capacity Backhauling." Wireless Personal Communications 82, no. 3: 1931-1953.

Journal article
Published: 01 December 2014 in International Journal of Distributed Sensor Networks
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This paper investigates a combination of fingerprinting (FP) and extended Kalman filter (EKF) based tracking aiming to tackle conventional problems related to implementation of either tracking or fingerprinting separately. One of the common drawbacks of FP belongs to large data size and consequent large search space. By taking advantage of latest position estimate got from EKF, a virtual surveillance area (VSA) is defined around the estimate. The dimension of this defined surveillance area is much smaller than the size of indoor environment. Consequently, there will be a possibility for FP to be applied in larger areas maintaining the possibility of adding necessary grid points in order to achieve a desired localization performance. Additionally, in order to improve accuracy of ranging, we investigate the impact of a priori knowledge related to the clusters impulse responses and other features; the applied so called soft ranging algorithm for time of arrival (TOA) estimation is modified in order to take advantage of this a priori information and to make its decision variables more accurate. Simulation results show a promising performance improvement via using the proposed hybrid tracking technique and applying a priori information to soft ranging. The tradeoff is along a reasonable increased implementation complexity.

ACS Style

Salar Bybordi; Luca Reggiani. Hybrid Fingerprinting-EKF Based Tracking Schemes for Indoor Passive Localization. International Journal of Distributed Sensor Networks 2014, 10, 1 .

AMA Style

Salar Bybordi, Luca Reggiani. Hybrid Fingerprinting-EKF Based Tracking Schemes for Indoor Passive Localization. International Journal of Distributed Sensor Networks. 2014; 10 (12):1.

Chicago/Turabian Style

Salar Bybordi; Luca Reggiani. 2014. "Hybrid Fingerprinting-EKF Based Tracking Schemes for Indoor Passive Localization." International Journal of Distributed Sensor Networks 10, no. 12: 1.

Conference paper
Published: 01 September 2014 in 2014 IEEE International Conference on Ultra-WideBand (ICUWB)
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Possession of information related to a target position, moving inside an indoor limited area, turns out to be a crucial application in the context of wireless sensor networks (WSNs). Localization algorithms, designed for a scenario consisting of a set of fixed nodes called beacons with known positions, aim to provide accurate estimates of target position. As a great concern for battery-powered nodes, energy saving is a fundamental issue for an effective and practical deployment. To this end, power allocation (PA) among beacons has been considered for optimizing localization performance; In general, optimal PA is achieved by considering ranging measures as necessary inputs of the localization algorithm. In the literature, on one hand the common made assumption about ranging measures is their ideal values equal to their corresponding Cramer-Rao bounds but, on the other hand, at high signal-to-noise ratios, real ranging estimators are characterized by different lower limits on their performance mainly as a result of maximum sampling rate and computational load available in the sensors. In this paper, the impact of a real ranging method on PA procedure for an UWB sensor network is investigated and a computationally efficient simplification is proposed.

ACS Style

Salar Bybordi; Luca Reggiani; Bybordi S.; Reggiani L.. Impact of real ranging on algorithms for power allocation in localization processes. 2014 IEEE International Conference on Ultra-WideBand (ICUWB) 2014, 292 -296.

AMA Style

Salar Bybordi, Luca Reggiani, Bybordi S., Reggiani L.. Impact of real ranging on algorithms for power allocation in localization processes. 2014 IEEE International Conference on Ultra-WideBand (ICUWB). 2014; ():292-296.

Chicago/Turabian Style

Salar Bybordi; Luca Reggiani; Bybordi S.; Reggiani L.. 2014. "Impact of real ranging on algorithms for power allocation in localization processes." 2014 IEEE International Conference on Ultra-WideBand (ICUWB) , no. : 292-296.

Review article
Published: 22 September 2013 in Journal of Sensors
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The context refers to “any information that can be used to characterize the situation of an entity, where an entity can be a person, place, or physical object.” Radio context awareness is defined as the ability of detecting and estimating a system state or parameter, either globally or concerning one of its components, in a radio system for enhancing performance at the physical, network, or application layers. In this paper, we review the fundamentals of context awareness and the recent advances in the main radio techniques that increase the context awareness and smartness, posing challenges and renewed opportunities to added-value applications in the context of the next generation of wireless networks.

ACS Style

Luca Reggiani; Jocelyn Fiorina; Sinan Gezici; Simone Morosi; Montse Najar. Radio Context Awareness and Applications. Journal of Sensors 2013, 2013, 1 -12.

AMA Style

Luca Reggiani, Jocelyn Fiorina, Sinan Gezici, Simone Morosi, Montse Najar. Radio Context Awareness and Applications. Journal of Sensors. 2013; 2013 ():1-12.

Chicago/Turabian Style

Luca Reggiani; Jocelyn Fiorina; Sinan Gezici; Simone Morosi; Montse Najar. 2013. "Radio Context Awareness and Applications." Journal of Sensors 2013, no. : 1-12.

Journal article
Published: 05 July 2013 in Wireless Personal Communications
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Spectrally efficient backhaul networks are one of the key-factors for the deployment of next generation wireless cellular systems. The ambitious capacity requirements for future broadband wireless networks and the high infrastructure costs for new cell sites pose new challenges in the design of high capacity point-to-point (PtP) wireless microwave links. In this paper we present a study on PtP links that utilize a peculiar form of multiple-input multiple-output configuration, in which a capacity doubling is obtained by exploiting the geometric characteristics of the Line-of-Sight link. The impact of adaptivity on the maximum achievable transmission distance in presence of the main electronic impairments, for typical physical parameters, is discussed in order to reveal the feasibility and the advantages of this class of solutions.

ACS Style

Luca Reggiani; Baccio Baccetti; Laura Dossi. The Role of Adaptivity in MIMO Line-of-Sight Systems for High Capacity Backhauling. Wireless Personal Communications 2013, 74, 373 -389.

AMA Style

Luca Reggiani, Baccio Baccetti, Laura Dossi. The Role of Adaptivity in MIMO Line-of-Sight Systems for High Capacity Backhauling. Wireless Personal Communications. 2013; 74 (2):373-389.

Chicago/Turabian Style

Luca Reggiani; Baccio Baccetti; Laura Dossi. 2013. "The Role of Adaptivity in MIMO Line-of-Sight Systems for High Capacity Backhauling." Wireless Personal Communications 74, no. 2: 373-389.

Book chapter
Published: 13 February 2013 in Vehicular Technologies - Deployment and Applications
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Small LTE Base Stations Deployment in Vehicle-to-Road- Infrastructure Communications | IntechOpen, Published on: 2013-02-13. Authors: Luca Reggiani, Laura Dossi, Lorenzo Galati Giordano, et

ACS Style

Luca Reggiani; Laura Dossi; Lorenzo Galati; Roberto Lambiase. Small LTE Base Stations Deployment in Vehicle-to-Road- Infrastructure Communications. Vehicular Technologies - Deployment and Applications 2013, 1 .

AMA Style

Luca Reggiani, Laura Dossi, Lorenzo Galati, Roberto Lambiase. Small LTE Base Stations Deployment in Vehicle-to-Road- Infrastructure Communications. Vehicular Technologies - Deployment and Applications. 2013; ():1.

Chicago/Turabian Style

Luca Reggiani; Laura Dossi; Lorenzo Galati; Roberto Lambiase. 2013. "Small LTE Base Stations Deployment in Vehicle-to-Road- Infrastructure Communications." Vehicular Technologies - Deployment and Applications , no. : 1.

Conference paper
Published: 01 September 2012 in 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing
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In this contribution a smart resource allocation algorithm which conjugates the capacity enhancement capability of a classical scheduling strategy based on a maximum Channel State Indicator assignment, and the interference mitigation capability provided in multi-cell environments by power adaptation, is analyzed and validated from an energy efficiency point of view. The proposed algorithm has the ambition of embodying a "green" solution to the problem of optimally allocating the transmission resources to both fixed or mobile users in an OFDMA (Orthogonal Frequency Division Multiple Access) multi-cell environment. A system level simulator reproducing, in a multi-cell scenario with mobile users, the standard parameters of LTE (Long Term Evolution) is used to analyze the impact of the proposed strategy on the system power efficiency. The comparison of its performance with the one provided by other classical scheduling strategies definitely states the advantages of the proposed solution in terms of energy efficiency, confirming the prominent role of power reduction effect on the performance of smart allocation strategies in cellular systems.

ACS Style

Luca Reggiani; Laura Dossi; Lorenzo Galati Giordano. Improving Energy Efficiency in Multi-Cell OFDMA Networks. 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing 2012, 1 -4.

AMA Style

Luca Reggiani, Laura Dossi, Lorenzo Galati Giordano. Improving Energy Efficiency in Multi-Cell OFDMA Networks. 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing. 2012; ():1-4.

Chicago/Turabian Style

Luca Reggiani; Laura Dossi; Lorenzo Galati Giordano. 2012. "Improving Energy Efficiency in Multi-Cell OFDMA Networks." 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing , no. : 1-4.

Conference paper
Published: 01 August 2012 in 2012 International Symposium on Wireless Communication Systems (ISWCS)
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Accurate ranging and localization are crucial applications for wireless sensor networks. Reliable position information, obtained with a reasonable complexity overhead and possibly low energy consumption, is necessary for a successful operation of these networks. The paper regards the analysis of the performance bounds of an approach for improving the trade-off between energy consumption and performance in a localization and tracking process. A set of fixed beacons is used for localizing a target that is moving in a limited environment and tracking is realized by mixing active signal transmissions, which allow using standard techniques for deriving distances and locations, as well as passive signal receptions, which exploit scattering caused by the target during signal propagation. Obviously, when the beacons exploit passive signal reflections, the target does not consume energy, differently from the steps characterized by the active exchange of radio signals. In the paper we present the analysis of the posterior Cramer-Rao Bound of this technique for a general scenario, highlighting the trade-offs between the energy savings and the performance costs in terms of localization error.

ACS Style

Luca Reggiani; Salar Bybordi. Performance trade-offs for energy efficient localization based on EKFs. 2012 International Symposium on Wireless Communication Systems (ISWCS) 2012, 501 -505.

AMA Style

Luca Reggiani, Salar Bybordi. Performance trade-offs for energy efficient localization based on EKFs. 2012 International Symposium on Wireless Communication Systems (ISWCS). 2012; ():501-505.

Chicago/Turabian Style

Luca Reggiani; Salar Bybordi. 2012. "Performance trade-offs for energy efficient localization based on EKFs." 2012 International Symposium on Wireless Communication Systems (ISWCS) , no. : 501-505.