Spatial filtering using adaptive or smart antennas has emerged as a promising technique to improve the performance of cellular mobile systems. This paper presents an overview in terms key characteristics, options, challenges and benefits, context current, but also with view towards future, generation personal communication

The channel capacity of a multiple-input-multiple-output (MIMO) communication system depends substantially on correlation between individual receive branches. We investigate the MIMO using matrix approach and Salz-Winters (1994) spatial model. It is shown that for linear array, has no impact provided two-element array beamwidth smaller than angle spread incoming signals. Simple but accurate approximations coefficient corresponding are derived different angular spreads.

Channel modeling of wireless communications from unmanned aerial vehicles (UAVs) is an emerging research challenge. In this paper, we propose a solution to issue by applying new framework for the prediction received signal strength (RSS) in mobile based on artificial neural networks (ANNs). The experimental data measurements are taken with UAV at different altitudes. We apply several evolutionary algorithms (EAs) conjunction Levenberg-Marquardt (LM) backpropagation algorithm order train ANNs...

The introduction of 5G networks brings forth new challenges for network operators, particularly in terms capacity and service quality. Consequently, monitoring assessing performance is crucial identifying problems improving functionality. This pertinent Non-Standalone (NSA) networks, which rely on existing 4G infrastructure may not fully leverage the advanced capabilities technology.νThis paper aims to evaluate wireless system/network focusing key quality indicators data throughput. To...

Adaptive antennas are now regarded by many within the wireless communications industry as a core system component in future-generation mobile networks. In order to promote European research and development this strategic area, Commission of Community has funded, through Research into Advanced Communications Europe, RACE, Technologies Services, ACTS, programs, Technology Smart Antennas for Universal Mobile Infrastructure, TSUNAMI, consortium further technological advances next millennium,...

As future mobile networks move rapidly to 5G, ubiquitous network coverage (even in remote areas), temporary capacity enhancement, and failure backup are still open issues. The recent advances unmanned aerial vehicles technology have turned the attention of researchers industry toward utilizing flying nodes 5G cellular. One or more UAVs could act as nodes, extending enhancing system capacity, on demand, fast, accurately, and, most important, at low cost. This article presents field...

The 5G radio networks have introduced major changes in terms of service requirements and bandwidth allocation compared to cellular date hence, they made the fundamental planning problem even more complex. In this work, focus is on providing a generic analysis for with help proper multi-objective optimization algorithm that considers main constraints coverage, capacity cost high-capacity scenarios range from dense ultra-dense mmWave standalone small-cell network deployments. results produced...

The usage of unmanned aerial vehicles (UAVs) as flying base stations (FBSs) for expanding coverage and assisting the terrestrial cellular networks constitutes a promising technology fifth generation (5G) beyond. A crucial parameter affecting network design is path loss prediction. An alternative to accurate, though time-consuming, propagation prediction with deterministic ray-tracing models could be machine learning (ML)-based predictions. Ensemble techniques are used in order optimally...

With the introduction of 5G networks, network operators are encountering novel challenges regarding coverage, capacity, and quality service. Therefore, it has become imperative to measure monitor performance networks identify anomalies optimize performance. This is particularly crucial for NSA as they constructed on top existing 4G infrastructure may not offer full potential technology. In this study, we underscore importance system measurements in recently deployed specifically a town that...

To enhance the flexibility of a geometrical single reflection statistical model to describe more accurately different large cell mobile communications operational scenarios, general case scatterers distributed within an ellipse is considered. Based on this model, simple formula for probability density function (PDF) angle arrival presented. The PDF circle also derived as special presented PDF.

In Part 1 an experimental demonstration of both transmit and receive beamforming supporting SDMA user access was given. 2 some implementation issues critical to the performance adaptive antenna system are studied from a practical point view. Results for sensitivity calibration errors linearity power amplifiers now presented measurements made during field trials.

The advent of 5G networks has presented network operators with new challenges in terms coverage, capacity, and service quality. As a result, it is essential to track evaluate performance detect irregularities enhance functionality. This especially important for NonStandalone (NSA) networks, which are built upon existing 4G infrastructure might not fully realize the capabilities technology. study emphasizes significance coverage measurements particularly within typical town setting featuring...

Despite the promising benefits, integration of 5G, particularly through Non-Standalone (NSA) architectures that rely on existing 4G infrastructures, introduces challenges in maintaining optimal radio network performance and service quality. This study evaluates 5G empirical field trials across highway operational scenarios, a domain less scrutinized compared with urban environments. By conducting simultaneous measurements comparing all available networks, this research focuses dissecting...

This paper presents the design and implementation of a versatile IoT testbed utilizing openHAB platform, along with various wireless interfaces, including Z-Wave, ZigBee, Wi-Fi, 4G-LTE (Long-Term Evolution), IR (Infrared Radiation), an array sensors for motion, temperature, luminance, humidity, vibration, UV (ultraviolet), energy consumption. First, architecture, setup, basic testing, collected data results are described. Then, by showcasing typical day in laboratory, we illustrate testbed’s...

Adaptive antennas are among the favourite techniques to help current systems evolve towards third generation mobile communication systems. However, major concerns for adaptive antenna calibration process and non-linearity effects of RF-IF chains upon performance beamforming network. This article investigates these issues based on experimental results produced with testbed that was developed under RACE TSUNAMI project. Results highlight sensitivity system both linearisation processes employed.

This paper considers the performance of a DS-CDMA system employing adaptive antenna technology at base station site for both an umbrella and micro-cell in hierarchical cell structure. The possible advantages problems from such deployment are discussed. By exploiting capabilities ray tracing to provide complex channel impulse response, new simulation model is presented along with some initial results well known algorithms multiple interference scenario. These insight into how operates when...

An adaptive antenna testbed for mobile communication applications is briefly described and results from field trials presented. The goal to provide an experimental demonstration of both transmit receive digital beamforming supporting SDMA user access. Trials are presented a typical urban environment with different combinations positions the ability employed algorithm establish link track channels investigated alongside BER performance. tracking performance used also tested indoor against...

Optimum base-station positioning in the framework of LTE wireless networks is not an easy task since there are several factors that need to be taken into account. The ever increasing demand for geographically inhomogeneous capacity, which has become limiting factor network planning process, as well presence relay nodes and mixed cell scenarios, must all now considered along with constraints capabilities system. In this paper, optimization problem system described results produced a proposed...

Building Information Modeling (BIM) is a critical element for the “digitalization” of construction industry and can be exploited energy-driven renovation procedures existing residences. Advancing beyond BIM with data-capturing capabilities that are limited to building static information only requires sensor data streams related indoor/outdoor ambient conditions, as well energy-consumption parameters The require deployment robust Wireless Sensor Networks (WSNs) able capture transmit real-time...

In order to evaluate the performance of third-generation mobile communication systems, radio channel models are required. The should be capable handling nonstationary scenarios with dynamic evolution multipath. this context and due introduction advanced antenna systems exploit spatial domain, a further expansion is needed in include characteristics channel. an attempt solve these problems, paper presents new stochastic spatio-temporal propagation model. model combination geometrically-based...

There is still an open debate within the research community regarding likely performance enhancement of smart antennas versus their complexity for commercial wireless applications. The goal study presented in this paper to investigate improvement attainable using relatively simple antenna techniques when applied third-generation W-CDMA air interface. Methods achieve include fixed multibeam architectures with different beam selection algorithms (maximum power criterion, combined beams) or...