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Distributed, networked communication systems, such as relay beamforming networks are typically designed without considering how the positions of the respective nodes might affect the quality of the communication. That is, network nodes are either assumed to be stationary in space, or, if some of them are moving while communicating, their trajectories are assumed to be independent of the respective...
The potential of full-duplex in communication design has been recently considered for emerging technologies such as 5G. Moreover, full-duplex can play a crucial role in upcoming secure communication scenarios too. However, results in the literature are limited and only explore scenarios, where the wireless channel is used either for key generation or for secure messaging. Our first contribution is...
A low phase noise and low cost voltage controlled oscillator (VCO) is usually required for WiGig system applications. In this paper an NMOS push-push cascade is proposed to match the better output impedance, better output power, and boost up to 60GHz effectively. The LC tank and cross-coupled circuit are designed by using 0.18 μm process. The output phase noise is simulated for −90.5 dBc/Hz at 1MHz...
This study shows the violation management system in walking races, which judges whether the correct technique is violated or not. Not only judges but also assistant judges who report the judges about the violation are needed in the management of walking races. In addition, a chief judge has to present the violation information which is gathered in advance near finish lines. Such an operation requires...
This design provides an automatic charging voltage and current adjustment through the wireless message transmission of a smart charger. The smart battery charging voltage and current can be adjusted according to different ambient temperatures to provide a safe operation. In addition, the current battery status and warning message can be transmitted through wireless message transmission to a smartphone...
A low-profile and compact 3D antenna operating at LTE, GSM and UMTS frequency bands (790–2690 MHz) is proposed for a vehicular 2×2 MIMO system. The performance of the single 3D radiating element is here analyzed. Then, the two-antenna system performance is analyzed in terms of impedance matching, isolation and envelope correlation coefficient, highlighting the effect of some geometrical parameters...
Internet of vehicles (IoVs) emerges as a promising technology to facilitate vehicular wireless communication by approving vehicle-to-everything (V2X) services for intelligent transportation systems including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and vehicle-to-pedestrian (V2P) services. V2V networks have been rapidly developed to support short distance data transmission among vehicles...
A Flying Ad-hoc Network (FANET) is a wireless ad-hoc network specifically designed for the communication of Unmanned Aerial Vehicles (UAVs). Multicast routing is one of the vital aspects in wireless ad-hoc networks. Research works have been proposed to tackle the challenges in multicast routing in ad-hoc network environments with multi-hop communication. Nevertheless, the conventional multicast routing...
Recent development of wireless communication systems and standards is characterized by constant increase of allocated spectrum resources. Since lower frequency ranges cannot provide sufficient amount of bandwidth, new bands are allocated at higher frequencies, for which operators might resort for deploying more base stations to ensure the same coverage. Connecting increased number of base stations...
The ongoing efforts in the research, development and standardization of 5G, by both industry and academia, have resulted in the identification of enablers (Software Defined Networks, Network Function Virtualization, Distributed Mobility Management, etc.) and critical areas (Mobility management, Interference management, Joint access-backhaul mechanisms, etc.) that will help achieve the 5G objectives...
The predictive proportional integral (PPI) controller being simple and non conservative like its Smith predictor and internal model control (IMC) counterparts, has the ability to be employed in environments characterised by uncertainties such as stochastic network delays. However, its performance degrades in the presence of measurement noise. This is due to the prediction involve in the controller...
This paper is regarding the proposal of a whole new concept in the category of automatic attendance marking systems. The proposed methodology suggests making use of the fact that more than 99 percent of the student population of today's generation has a smartphone on his or her person, all of which are capable of using and sharing data via Wi-Fi technology. Use of such technology coupled with a background...
Different from electric current, the magnetic current can't be supported on a piece of metallic wire or similar structures. It is usually designed as an equivalent concept using electric small loops. In this paper, we have proposed a method to synthesize the magnetic current in a simple but not trivial structure, compared with the existing ways. A cavity is utilized to provide an aperture to perform...
The perfect Gaussian integer sequences have been recently used in orthogonal frequency division multiplexing (OFDM) systems and code division multiple access (CDMA) systems. This paper proposes a new construction method, called monomial o-polynomials, to generate the perfect Gaussian integer sequences. The resulting sequences have odd periods and high energy efficiency. Furthermore, the number of...
There is a trend that the functionalities of communication, computing, and caching (CC&C) are merging together in the future networks. Recently, this mergence is formed by the concept of cloud radio access network (C-RAN) with caching as a service (CaaS). In this paper, we dissect the interactions of CC&C in C-RAN with CaaS from two dimensions: physical resource dimension and time dimension...
To satisfy diverse use cases and business models in fifth generation (5G) wireless communication, network slicing in fog radio access networks (F-RANs) is proposed, which provides a cost efficient networking in a convenient way. However, the resource management for network slices is challenging, especially when the edge caching is utilized to alleviate the fronthaul burden and reduce the delay. In...
The millimeter wave communication is largely affected by distance dependent large scale fading. With the recent improvements in accurate localization techniques, location information can be exploited to improve the network capacity in an mm-wave channel instead of the more computationally extensive channel state information (CSI). We discuss how the classical waterfilling algorithm can be applied...
Exploiting full-duplex (FD) technology on base stations (BSs) is a promising solution to enhancing the system performance. Motivated by this, we revisit a full-duplex base station (FD-BS) aided OFDMA system, which consists of one BS, several uplink/downlink users and multiple subcarriers. A joint 3-dimensional (3D) mapping scheme among subcarriers, down-link users (DUEs), uplink users (UUEs) is considered...
Decentralized coded caching is applicable in scenarios where the server does not have enough knowledge about the entire cache network to perform centralized coordination during prefetching, such as when the server is uninformed of the number of active users and their identities in a wireless or mobile environment. Most of known decentralized strategies use random uncoded prefetching followed by coded...
We study frameless ALOHA with multiple base station (BS) cooperation, where the coverage area of each BS partially overlaps, and the BSs cooperate via a backhaul network to share successfully retrieved packets. The exact packet loss rate for networks with the arbitrary number of BSs is theoretically analyzed, which reveals how the throughput improvement is achieved. Computer simulations confirm that...
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