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In this paper, we develop a unifying H-transform analysis for the channel capacity in H-fading and degree-2 irregular H-fading using the new systematic language of transcendental H-functions. By virtue of Mellin and convolution operations involved in the Mellin transform and Mellin convolution of two H-functions, the H-transform for the channel capacity culminate in again H-functions. Using the algebraic...
This paper deals with blind equalization in orthogonal frequency division multiplexing/offset quadrature amplitude modulation (OFDM/OQAM) systems. Blind equalization is an interesting solution with regard to the spectral efficiency since no pilot is used for the signal recovering, but blind iterative algorithms suffer from a large convergence speed toward the steady-state. An initialization strategy...
Nowadays, users are demanding access to video content anytime and anywhere. LTE broadcast services and video streaming services can reduce the resources used by telecommunication companies to give access to video content and open up new business opportunities. In this context, testbeds and simulation tools can help in the analysis of the different parameters that need to be considered in the deployment...
Traffic engineering (TE) is dealing with the issue of performance evaluation and optimization of networks. TE mechanisms have been widely exploited in the past and current networks, however their corresponding TE solutions are unfavorable for the next generation networking paradigms. To overcome the ever-increasing size and complexity of network management, Autonomic Network Management (ANM) and Software...
In this paper, we present and evaluate a low-cost platform, able to emulate multiple primary and secondary users with a single Software Defined Radio (SDR) device. By effectively exploiting techniques that are applicable to OFDM, we manage to transmit simultaneously multiple DVB-T channels, along with IEEE 802.11a/g and wireless microphone signals. Utilizing a single PC with open-source software and...
Anomaly detection of Internet traffic is a network service of primary importance, given the constant threats that impinge on Internet security. From a statistical perspective, traffic anomalies can be considered outliers, and must be handled through effective outlier detection methods, for which feature selection is an important pre-processing step. Feature selection removes the redundant and irrelevant...
5G mobile networks will very likely include features that allow for a dynamic spectrum access (DSA) in order to exploit spectrum holes of a primary system. The efficient utilization of spectrum holes with minimum impairment of the primary system requires a waveform with a very low adjacent channel leakage ratio as well as robustness to time and frequency offsets. One of the approaches for new waveforms...
Content broadcasting over wireless networks heavily relies on Application-Level FEC codes to improve transmission robustness in front of channel erasures. Because they operate in the higher layers of the protocol stack, they benefit from a lot of flexibility. In particular, since streaming applications and bulk transfer applications have different constraints, different packet scheduling strategies...
Time drift in distributed systems is an important issue especially for mobile ad hoc networks. Indeed, it can break the synchronization between the internal clocks of the nodes. Consequently, protocols over such networks should consider this problem in the case where they need to use time information. In this paper, we define a new collaborative system for autonomous mobile robots called AMiRALE....
The Digital Agenda for Europe (DAE) sets forth ambitious requirements for broadband communications, in which Satellite Communications (SatCom) play a major role. In this context, spectrum sharing techniques offer unprecedented opportunities to increase capacity and reduce costs in order to allow SatCom to meet the DAE objectives. The EU FP7 Project CoRaSat is assessing Cognitive Radio (CR) techniques...
In this paper, we establish a unifying framework to analyze symbol error probability (SEP) for wireless communication where the fading envelope is described by H-fading or degree-2 irregular H-fading. By virtue of two essential operations—termed as Mellin and convolution operations— involved in the Mellin transform and Mellin convolution of two H-functions, the H-transform for the SEP culminate in...
Resource allocators that maximize ergodic sum-rate under proportional rate constraints have been recently introduced and analysed for both OFDMA and SC-FDMA wireless systems. They are able to provide long-term fairness by assigning to users, on average, a predefined share of the available system capacity. However, the short-term fairness of these schedulers with its effect on the delays, and their...
This paper addresses the virtualisation of wireless access in order to provide the required capacity (data rate) to a Virtual Base Station (VBS). The approach is based on a Virtual Radio Resource Allocation algorithm, OnDemandVRRA, which manages the allocation of the physical radio resources to VBSs' end-users, in order to follow the contract and maintaining isolation among VBSs, according to the...
Cloud Radio Access Network (C-RAN) architecture has been proposed as a promising solution to overcome the challenges of Next Generation (5G) cellular networks, in terms of efficiency, capacity, scalability, flexibility and sustainability in a cost-effective and power efficient way. However C-RAN demands a new energy consumption model and its resources optimised. This Paper presented the C-RAN to reduce...
Cloud Radio Access Network (C-RAN) is a new architecture designed to be the candidate for enabling future mobile networks. However, it will be deployed only if it is economically viable. In this paper we investigate the technological options of C-RAN deployments. By using analytical methods we derive engineering guidelines for minimizing the CAPital EXpenditure (CAPEX) of C-RAN deployment. We show...
This paper presents some key findings w.r.t. the Radio Resource Management (RRM) in wireless Backhaul (BH) of mmWave networks. First, the envisioned design of mmWave backhaul architecture is outlined highlighting the most important newly needed functional blocks and in what they differ from a non-mmWave architectures. Next, the challenges and functionality of RRM techniques are discussed, focusing...
For full-data exchange multi-way relay channels, a novel efficient multi-way relay network coding scheme is proposed. It is based on multi-stage two-way network coding, which is low-complexity and high reliable. For the channel without noise, the throughput per node per channel is increased by 50 % compared to plain routing, and even by 12.5% compared to the binary-signaling network coding scheme...
To cope with data communication explosion, the alternative, “D2D communication” which enables mobile devices to communicate each other without base station is studied. Even though D2D communication has a lot of benefits (infra-less communication providing service at a lower cost and etc), the interference induced by D2D links is inevitable problem where D2D and cellular links share same radio channels...
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