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In this paper, the asymptotic favorable propagation (FP) condition is thoroughly analyzed under the assumption that user terminals (UTs) are gathered in a size-limited circular area. Uniform distribution is assumed for UTs. Assumptions that are accordant with realistic propagation environment are used, which mathematically bring in close-form approximations for mean and variance of FP. Based on these...
The paper introduces an efficiency factor useful for the pattern synthesis of the transmitting antenna arrays with each array element being fed by its own power amplifier, active power of which is limited. The factor is based on the L∞ norm of the active powers at the elements' feeds with mutual coupling between elements taken into account. Two Second Order Cone Programming (SOCP) based methods of...
We consider the application of linear physical-layer network coding over a general multilayer wireless relay network. We introduce a model of the network and show conditions under which at least one source can be unambiguously decoded at at least one destination. We also discuss some potential linear algebraic constructs upon which the network coding functions may be based, and give some example networks.
We analyse the problem of performing wireless localization with Golomb-optimized multipoint ranging between a target and multiple receivers efficiently and accurately. The ranging algorithm we developed in [1] is utilized by adapting superresolution techniques to the ranging problem, using phase-difference of arrival (PDoA). The algorithm handles multipoint ranging efficiently by employing an orthogonalized...
In this paper, the problem of content-aware user clustering and content caching in wireless small cell networks is studied. In particular, a service delay minimization problem is formulated, aiming at optimally caching contents at the small cell base stations (SCBSs). To solve the optimization problem, we decouple it into two interrelated subproblems. First, a clustering algorithm is proposed grouping...
This paper addresses the problem of multiple relay selection in a two-hop wireless cooperative network. In particular, the proposed technique selects the best subset of relays, in a distributed beamforming scheme, which maximizes the signal-to-noise ratio at the destination node subject to individual power constraints at the relays. The selection of the best subset of K relays out of a set of N potential...
In this paper, large partially connected wireless relay interference networks are considered. The entire network is made up of multiple disjoint groups of source-destination node pairs and relays called subnetworks. Each subnetwork is assumed to be fully connected. The different subnetworks are mutually connected by a few inter-subnetwork links. A two-hop relay-aided interference alignment scheme...
RFID is an emerging technology that provides timely and high-value information to inventory management and object tracking, in which areas that identifying unknown tags completely is crucial. From prior researches in this area, one of the pending problem involves processing redundant time frames due to unknown tag collisions. In this paper, we propose a time-efficient unknown tag identification protocol...
In this paper, we examine distributed and fair resource allocation for weighted sum multicell capacity maximization in multi-input single-output (MISO)-Orthogonal Frequency-Division Multiple Access (OFDMA) multicell systems with reduced feedback links. We apply zero forcing (ZF) precoding to reduce interference between the users in the same cell and then propose iterative distributed power allocation...
This paper investigates the problem of power efficiency for spatially multiplexed multiple-input multiple-output (MIMO) visible light communication (VLC) system. In this system, it combines the optical communication with illumination, but the offset power, which is used to satisfy the nonnegative constraint of the transmitter-side signal after precoding, leads to the reduction of power efficiency...
Cloud radio access network (C-RAN) is a next generation wireless access network architecture. In this architecture, common public radio interface (CPRI) links are widely used to transmit baseband signals. Currently, one of the great technical challenges for the C-RAN architecture is the soaring CPRI bandwidth required for data transmission between remote radio unit (RRU) and baseband unit (BBU). In...
In this paper, we focus on the problem of optimal precoding for simultaneous wireless information and power transfer (SWIPT) in a two-hop decode-and-forward (DF) multiple-input multiple-output (MIMO) relay network, which consists of a source, a relay station, an information decoding (ID) receiver and an energy harvesting (EH) receiver. Each node in this relay network is assumed to employ multiple...
Vehicular ad hoc networks (VANETs) is an efficient enabler for safe and efficient Intelligent Transport Systems. The introduction of intermediate vehicles improves the performance of VANETs prominently. In this paper, we introduce buses as intermediate vehicles to improve the system efficiency. We also introduce the coalition game model to study the relationships between buses and add incentives for...
Gait analysis by using wearable inertial sensors has gained tremendous achievements in recent years. A limitation of using inertial measurement unit (IMU) is that inertial signals heavily rely on the correctness of sensor installation. A slight installation orientation error could lead to inaccurate results for quantitative estimation of gait parameters. In this paper, a calibration method was proposed...
Wireless electrocardiography (ECG) systems are crucial in detecting and diagnosing heart disorders. Minimizing power consumption and sampling-rate should be the key aspects when designing wireless ECG systems. In order to achieve portability coupled with ultra-low power consumption and sampling-rate, clustering and classification algorithms play an important role in developing wireless ECG systems...
Many network control policies can benefit from introducing priorities among users, traffic flows, or service provisions e.g. For QoS improvement or network congestion avoidance. In order to ensure fairness of concomitant resource sharing tasks, generic extensions of maxmin fairness under priority are considered. A critical analysis of existing approaches leads to the definition of two fairness relations...
In this paper, the H∞ Synthesis problem is considered for a class of Lurie unified model termed delayed standard neural network model (DSNNM) via a wireless neural control network (WNCN). We assume that all neuron nodes in WNCN which have limited energy, storage space and computing ability can be regarded as a sub-controller, then the whole WNCN is characterized by mesh-like structure with partially...
Numerous research works have been done on the Choquet integral model due to the tremendous usage in many fields. However, the application is still significantly restricted by the curse of dimensionality, involved in determining the non-additive interaction measures, that can properly reflect the interactions among predictive attributes toward the objective. To this end, in this paper we propose a...
Channel sounding is generally conducted under the assumption that the wireless channel is free from interfering signals, i.e., in clear channels. As regulators begin to deploy new services in spectrum that is already occupied by other services, channel sounding must often be conducted in occupied channels with all the obvious attendant difficulties. Here, we propose alternative sense-decide-act strategies...
Wireless communication is very important for the safety production in coal mine. In this paper, the novel analysis method for polarization modes on wireless communication in coal mine tunnel using reflection coefficient and transmission coefficient is presented, and we suggest packet-level adaptive interleaved forward error correction(I-FEC) at the application layer for improving the communication...
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