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We study energy-efficient decentralized coordinated beam-forming in multi-cell multiuser multiple-input single-output system. The problem of interest is to maximize the weighted sum energy efficiency subject to user-specific quality of service constraints. The original problem is iteratively approximated as a convex program according to successive convex approximation (SCA) principle. The convex problem...
Device-to-device (D2D) communications can enhance the overall system capacity by reusing cellular spectrum, which at the same time leads to severe interference to cellular connections and vice versa. In practice, even when two wireless connections share the same spectrum, the interference between them may not always exist if there is no conflict at packet-level transmissions. Thus, in this paper,...
The increasing demand for data and multimedia services, as well as the ubiquitous nature of the current generation of mobile devices have resulted in continuous network upgrades to support an ever-increasing number of users. However, given that wireless communication systems operate on radiofrequency waves, the health effects of electromagnetic (EM) emission from these systems are increasingly becoming...
Electrical joints with cylindrical aluminum conductors are often used in Gas Insulated Switchgears (GIS) and Gas Insulated Lines (GIL). Separable connections have to be used for dealing with relative movement between the conductor and the encapsulation initiated by thermal expansion on one end of the conductor. On the other end of the conductor permanent connections can be used with the intention...
The IEEE 802.11 standard based Wireless Local Area Networks (WLAN) is the most popular and widely deployed communication protocol in the world. It is anticipated that WLAN will drive the future communication systems in order to provide more data rate for more users. IEEE 802.11ax is one of the most promising and advanced standards among the drafts. Full duplex radio with self-interference cancellation...
When white space radio systems of the same type are operating in the same geographic location, coexistence problem can be solved by self-coexistence mechanisms embedded in such radio systems. However, when neighbor white space radio systems are of a different type, external coexistence system is required. This paper presents implementation of such coexistence system based on the IEEE 802.19.1 standard...
In this manuscript we consider several cells with heterogeneous characteristics, macro and small, working under the same spectrum. These cells serve a set of users, which are split between the two cell types. Under a frequency reuse of one, the users allocated to different cells generate harmful interference between them. We apply interference alignment (IA) at both macro and small-cell users to tackle...
An ECG is a graphic produced by an electrocardiograph that shows its significance in heart disease diagnostics, Bio-metric authentication, Human Computer Interface (HCI), etc. by recording the electrical activity of heart with respect to time. In each application noise elimination is initial step. Normally, the ECG signal is highly sensitive as it varies a lot with time. It is mainly corrupted by...
Storage Consolidation is increasing being adopted to reduce system costs, simplify the storage infrastructure, and enhance availability and resource management. However, consolidation leads to interference in shared resources. This poster shows the effect of consolidation on performance of co-located applications and proposes a static approach to reduce interference.
The following paper investigates the secondary sum rate of MIMO two-way cognitive relay networks with multiple relays using amplify and forward (AF) strategy. The capacity of the system can be maximize by using optimum power allocation (OPA) algorithm in place of equal power allocation(EPA) among all nodes, while assuming that all node having fully channel state information (CSI). It has been considered...
Several techniques such as carrier aggregation (CA) and cognitive radio (CR) have been proposed to achieve high data rates to meet the demand of future wireless communication systems. Those techniques pose a strict adjacent channel interference (ACI) requirement. However, currently employed orthogonal frequency division multiplexing (OFDM) systems suffer from significant spectrum leakage and require...
The existing in-vehicle networks are not capable of accommodating increased data in vehicle and the demand of bandwidth. Next generation networks require higher bandwidth and shorter latency. Therefore, inexpensive and high bandwidth ethernet have be studied. IEEE802.1 Audio Video Bridging (AVB) is the standard used to transmit Audio and Video streaming data with guaranteed Quality of Service (QoS)...
This paper addresses the characterization of optimal input distributions for the general additive quadrature Gaussian-mixture (GM) noise channel under an average power constraint. The considered model can be used to represent a wide variety of communication channels, such as the well-known Bernoulli-Gaussian and Middleton Class-A impulsive noise channels, co-channel interference in cellular communications,...
In this paper, a low overhead preamble structure is proposed for the interference approximation method — complex (IAM-C) method in offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OQAM-OFDM) systems. Compared with the conventional preamble structure with three columns of symbols, the proposed preamble structure only requires two columns of symbols as the preamble...
In this paper we investigate the effect of interference caused by in-band full-duplex radios in device-to-device communication (D2D). While using full-duplex radios in D2D, both users transmit, compared to half-duplex D2D in which one user transmits. This is going to cause more interference in underlay D2D communication since D2D link operates on the same radio resource blocks as cellular users. We...
Multipath-assisted localization is a promising concept for cooperative agent networks to guarantee robust and accurate positioning in indoor environments with harsh radio channel characteristics. It uses two types of measurements: (i) bistatic measurements between agents and (ii) monostatic (bat-like) measurements by the individual agents. This paper presents an in-depth analysis of the position-related...
To meet the challenge of the ever-growing traffic volume in current wireless communications, ultra-dense network (UDN) deployment with high system capacity has attracted wide attention in recent years. However, existing researches on UDN mainly focus on system throughput while ignore energy efficiency (EE). Therefore, we will analyze the UDN performance including not only system throughput but also...
Cloud radio networks employ coordinated transmission among base stations (BSs) to reduce the interference effects. The practical limitations in implementing coordination results in suboptimal systems with limited performance. In this paper, we analyze the performance of a cloud network with clustering, where geographically close BSs form a clustered cloud. Coverage probability and rate distributions...
Mobile user equipment relay (UER) has been introduced by 3GPP to enhance communication reliability through device-to-device (D2D) communications. However, as UER needs to use its own power to forward other user's data, D2D communication may be unreasonable to the UER. To overcome this issue, motivated by the recent progress in energy harvesting (EH) techniques, we propose a D2D communication provided...
Due to a wider range of services in future heterogeneous cellular network (HCN), packet transmission delay becomes a more essential performance metric for system design. In this paper, we propose an analytical framework to derive the delay performance of HCN in terms of local delay, by modeling the locations of base stations (BSs) in HCN as superimposed of independent Poisson point processes. In the...
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