Several key enabling techniques are introduced for next-generation wireless communication systems. Small-cell and cloud-RAN systems have been considered as promising solutions to meet the capacity demand of future access networks. In addition, utilization high radio frequency (e.g., millimeter-wave band) is another dimension expand spectrum enhance throughput. From network perspective, a capacity, low latency, reliable backhaul/fronthaul important support advanced techniques. Therefore,...

This paper introduces two radio-over-fiber (RoF) architectures for the future broadband optical-wireless access network-all-band RoF and band-mapped 60-GHz that can be integrated in ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON). Legacy wireless services multi-gigabit millimeter-wave (mm-wave) applications are delivered simultaneously under one shared infrastructure. With centralized system control signal processing, proposed systems provide cost-effective...

We introduce a novel two-stage approach for the important cybersecurity problem of detecting presence botnet and identifying compromised nodes (the bots), ideally before becomes active. The first stage detects anomalies by leveraging large deviations an empirical distribution. propose two approaches to create distribution: 1) flow-based estimating histogram quantized flows 2) graph-based degree distribution node interaction graphs, encompassing both Erdös-Rényi graphs scale-free graphs....

The research on Wi-Fi sensing has been thriving over the past decade but process not smooth. Three barriers always hamper research: 1) unknown baseband design and its influence; 2) inadequate hardware; 3) lack of versatile flexible measurement software. This article tries to eliminate these through following work. <i>First</i>, we present an in-depth study Qualcomm Atheros AR9300 (QCA9300) NIC. We identify a missing item existing channel state information (CSI) model, namely, CSI distortion,...

In this paper, we investigate the optimal power allocation strategy that aims at maximizing capacity in OFDM- based cognitive radio systems. We show traditional water-filling algorithm applied general OFDM systems needs to be modified due per subchannel constraints such An iterative partitioned is proposed and proved on convex optimization theory.

We experimentally demonstrate what we believe to be a novel wavelength division multiplexing–passive optical networking (WDM-PON) architecture compatible with 60 GHz radio-over-fiber systems simultaneously provide wireless or wired services. place each wireless/wire-line channel in one WDM slot carry 2.5 Gb∕s orthogonal frequency multiplexing (OFDM) signal and reuse downstream wavelengths of the wire-line channels for uplink by an on–off-keying modulation format signal. For independent...

This paper discusses the realization of Adaptive Traffic Load slotted MACA in cellular based M2M communication. Based on statistic information channel's occupancy rate, base station estimates traffic load and calculates RTS transmission probability broadcast to members. By using ATL S-MACA we control access terminals system for high arrival rates. Thus maintain its throughput at 70.4%. As no carry sensing module is needed, implementation this protocol not very complex only requires continue...

We propose a coordinated multipoint transmission method in millimeter-wave small cells enabled by centralized radio-over-fiber architecture. By using transmissions, we improve infrastructure utilization and reception quality, increase the chance of line-of-sight links, reduce inter-cell interference. With radio-over-fiber, release coordination overhead provide joint processing, resource sharing, precise synchronizations, channel orthogonality based on which transmissions are achieved....

In this communication, a half Maxwell fish-eye (HMFE) lens antenna is designed in the 8-11 GHz band using etched planar metamaterials composed of an array nonresonant square rings with gap (SRG). The refractive index HMFE can be flexibly obtained two different ways: one to adjust edge length SRG unit cell; other change size and line width cell simultaneously. fed by nondirective monopole embedded staircase parallel-plate transverse electromagnetic (TEM) waveguide. A prototype has been...

We proposed to use the non-orthogonal multiple access (NOMA) scheme in 60-GHz-millimeter-wave radio-over-fiber systems, exploiting power domain of signals enable multiuser access, and improve performance with users under different channel conditions. A DSP-based successive interference cancellation is implemented receiver remove from other users. By this NOMA scheme, system optimizes all as a whole group dynamically allocates resources between users, such that reception quality reliability...

Triboelectric nanogenerators (TENGs) are newly developed energy-harvesting mechanisms, which can efficiently transmute irregular mechanical energy into scarce electrical energy. However, the performance of TENGs shows a decreasing tendency with increase in temperature, and negative effect caused by friction heat operating environmental thermal stresses for output performance, durability, reliability still bottleneck, restricting practical application TENG electronic devices. Especially...

Urban modelling is an important branch of land use science. It integrates geography, surveying and mapping, information science, system economics, sociology other disciplines to establish urban models, which have been used provide support for policymaking or analyses. models are understand, analyse, evaluate reproduce the process development, predict consequence planning scenarios. In this paper, we a systematic review including evaluation, classification, application timeline models'...

Previously developed techniques for modulation classification have assumed that both the signal and noise power are known. However, or estimations require type is To solve problem, this paper introduces a method joint estimation (JPEMC), whose key point employing relationships between second- higher moments of received power. Simulation results demonstrate efficiency JPEMC indicate can be used by later demodulators.

In this paper, we study the power allocation and relay selection strategy for two-way relaying systems using physical-layer network coding (PNC), in which two information symbols can be exchanged time slots. Our approach is based on maximizing objective rate under a total budget consumed by transmission of symbols. Two optimization objectives, namely, minimum achievable rates directions sum system, are considered here. Since objectives not continuously differentiable functions, propose...

This paper investigates how individuals' product choices are influenced by the of their connected others and influence mechanism may differ for fashion- versus technology-related products. We conduct a novel field experiment to induce observe choice interdependence in closed social network. In our experiment, we conceptualize be driven multiattribute utilities, measure initial attribute preferences prior observing collecting network information. These design elements help alleviate concerns...

Channel measurements show that significant spatially non-wide-sense-stationary characteristics rise in massive MIMO channels. Notable parameter variations are experienced along the base station array, such as average received energy at each antenna, and directions of arrival signals impinging on different parts array. In this paper, a new channel model is proposed to describe spatial non-stationarity channels by incorporating concepts partially visible clusters wholly clusters. Furthermore,...

In this letter, we proposed a centralized pre-equalization mechanism in fiber-wireless integrated mobile fronthaul system to compensate the channel degradation among multiple component carriers (CCs) with reduced complexity and cost at user terminals. Orthogonal frequency division multiplexing filter-bank multicarrier (FBMC) without frequency-domain are compared 50-GHz radio-over-fiber testbed. comparison, FBMC performs better because asynchronous up-link CCs can be quasi-seamlessly...

The global rise of offsite construction has created a compelling need for more efficient information management. This paper reports the development nomenclature system components to enable better management in projects digital era. Firstly, criteria suitable names are derived from current practices, other matured naming practices and quality requirements. Then, through collaboration with industrial stakeholders balance different needs arrive at common understandings, we propose that confers...

In this paper, we study the effect of difference in network nodes’ identification capabilities on rumor propagation. A novel susceptible-infected-removed (SIR) model is proposed, based mean-field theory, to investigate dynamical behaviors such homogeneous networks and inhomogeneous networks, respectively. Theoretical analysis simulation results demonstrate that when consider influence capabilities, critical thresholds obviously increase, but final sizes are apparently reduced. We also find...

MapReduce is a popular programming model in cloud computing to deal with the high computational task, such as video transcoding. It splits (task) into multiple segments (subtasks) and transcodes them parallel cluster. Due complexity of transcoding poor performance heterogeneous cluster, scheduling these subtasks minimize total time still challenge. In this paper, we propose prediction-based locality-aware task (PLTS) method for parallelizing over First, analyze decoding encoding technologies...