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The Internet of Things (IoT), describing the Machine Type Communications (MTC), is in the center of many new technical studies and industrial projects. It is also a central topic for the future 5G technologies standardization. Pending the new generation of cellular networks, the 3rd Generation Partnership Project (3GPP) has already standardized in May 2016, an evolution of the 2G and 4G networks to...
In this paper, a network selection algorithm for heterogeneous wireless networks (HWNs) is proposed. The proposed solution deploys contextual information related to the user preferences, user data rate requirements, and network's constraints. Networks are ranked based on a weighted profit function that combines two attributes: the relative received signal strength (RRSS) and the mobile terminal (MT)...
Receive Antenna Shift Keying (RASK) is a Spatial Modulation (SM) transmission scheme that has recently been under study because of its low detection complexity and its ability to increase the spectral efficiency when combined with classical IQ modulation schemes. The idea is that the transmitter uses a focusing technique to target one of the receive antennas. The transmitted information is coded depending...
In the growing context of Machine Type Communications (MTC), synthesized by the concept of Internet of Things (IoT), the need of an increased coverage pushes the industrial companies to develop efficient transmission techniques. Especially, the 3rd Generation Partnership Project (3GPP) already standardized evolutions of the 2G and 4G networks to include IoT features. These new standards share the...
Hybrid broadcast broadband TV (HbbTV) is a technique providing Push-VOD services over an interactive hybrid TV. These services are broadcast using File Delivery Protocol (FDP) characterized by three levels of data representation and give rise to three loss distributions that may result in poor Forward Error Correction (FEC) recovery capabilities. In this paper, we first analyze the behaviour of the...
In this paper, the problem of peak-to-average power ratio (PAPR) reduction of orthogonal frequency division multiplexing (OFDM) signals is investigated in the context of second generation of digital video broadcasting for terrestrial transmission (DVB-T2) and the American digital video broadcasting standard ATSC3.0. As a multicarrier modulation technique is characterized by a high PAPR of the transmitted...
The new spatial modulation schemes that appeared in the early twenty-first century allow for a new exploitation of the space to an increase in the spectral efficiency of MIMO systems. These new schemes commonly referred to as spatial modulations use the index of the transmit (resp. the receive) antenna to transmit additional data. We concentrate our study on the spatial modulations at the receiver...
This paper proposes a solution to maximize the power efficiency, i.e. datarate per power unit, in a heterogeneous wireless system that is based on integrated mobile base stations (BSs) and Wi-Fi access points (APs). In this context, a user association and downlink resource allocation optimization problem is formulated. The formulated problem considers the power consumption at both networks and mobile...
This paper discusses the problem of user association and downlink resource allocation in heterogeneous wireless networks (HWNs) where a mobile node (MN) can associate to a single network at a time. A context-aware optimization problem is formulated to maximize the aggregate user-centric profit in the system while taking into consideration the network constraints, user preferences, and the amount of...
Hybrid broadcast broadband TV (HbbTV) is a technique providing Push-VOD services over an interactive hybrid TV. These services are broadcast using File Delivery Protocol (FDP) characterized by three levels of data represen- tation and give rise to three loss distribution that may result in QoS degradation and poor Forward Error Correction (FEC) recovery capabilities (if FEC is used within FDP). In...
The aim of this paper is to analytically evaluate the spectral regrowth at the output of a transmitter due to the nonlinear components such as the power amplifier (PA). Therefore, we propose a generalization of existing closed-form expression for the Power Spectral Density (PSD) of nonlinear amplified multicarrier signals to be valid for any type of modulation. Then, we derive the PSD of the amplified...
The high peak-to-average power ratio (PAPR) remains a major drawback of multicarrier modulations. Hence, the nonlinear characteristics of power amplifiers (PA) results in strong distortion and low power efficiency when multicarrier modulations are used. In this paper, the impact of the nonlinearities on the amplified multicarrier signal is analyzed, considering both PAPR limitation using clipping...
This paper provides a theoretical analysis of the performance of an hybrid network composed of a broadband system and a broadcast system which cooperate to deliver linear services on portable and mobile devices. First, we propose a global system model for the hybrid network in which the coverage area of the broadcast system is adjusted with respect to the spatial distribution of the users. Then based...
Hybrid broadcast broadband TV (HbbTV) is an European initiative for providing viewers a richer experience of enhanced and interactive hybrid TV, through the launching of innovative hybrid services on both broadcast and broadband networks, allowing the viewer to interact with the current TV program. The latest release, HbbTV standard v2.0, provides additional features to HbbTV applications. Among the...
The high Power Amplifier (PA) dominates the power consumption in DVB transceiver systems and requests focusing the power efficiency improvements on this device; especially when multi-carrier modulations are used which is characterized by high Peak-to-Average Power Ratio (PAPR). In this paper, first, we provide analytical expression of the Error Vector Magnitude (EVM) of the amplified signal when polynomial...
This paper studies the optimal broadcast coverage radius in a hybrid network from the perspective of network planning. The hybrid network is composed of a unicast and broadcast systems which cooperate to deliver linear services on portable and mobile devices. First we define a hybrid approach in which the coverage radius of the broadcast network is adjusted according to the distribution of the users...
As evident from the increasing number of technical studies on machine type communications, Internet of Things (IoT) has become a hot topic. Among all the initiatives attempting to build end-to-end connectivity solutions, the 3rd Generation Partnership Project (3GPP) is actively working on the integration of IoT features into the existing 2G and 4G network specifications. In the framework of the adaptation...
The high Power Amplifier (PA) dominates the power consumption in LTE transceiver systems in macro base stations and requests focusing the energy efficiency improvements on this device. In this paper, the impact of the nonlinearities on the amplified multicarrier signal is analyzed considering both linearization and Peak-to-Average Power Ratio (PAPR) reduction techniques. Therefore, we provide the...
Integrating different types of wireless access technologies in heterogeneous networks provides flexible choices for users to handover to a more preferable network that satisfies their needs. In this paper, we discuss the recent 802.21.1 Software Defined Radio Access Network (SDRAN) architecture that couples the Software Defined Networking (SDN) mechanisms by the IEEE 802.21 Media Independent Handover...
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