A reconfigurable wideband and multiband C-Slot patch antenna with dual-patch elements is proposed studied. It occupies a compact volume of 50 × 1.57 (3925 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> ), including the ground plane. The can operate in two dual-band modes mode from 5 to 7 GHz. Two parallel C-Slots on are employed perturb surface current paths for excitation modes. switches, implemented using PIN diodes, placed...

This paper investigates the design and performance of an FIR echo canceller for on-channel repeaters in DVB-T/H network within framework PLUTO project. The possible approaches cancellation are briefly reviewed main guidelines such systems presented. system parameters discussed. based on open loop feedforward approach channel estimation is tested different radio conditions number taps filter. It shown that a minimum recommended to achieve certain mean rejection ratio or isolation depending...

We report on a fast, easily implemented method to determine all the geometrical alignment errors of laser tracker, high precision. The technique requires no specialist equipment and can be performed in less than an hour. is based determination parameters geometric model using measurements set fixed target locations, from multiple locations tracker. After fitting observed data, used perform error correction raw tracker data or derive format manufacturer's internal map. In addition parameters,...

This paper presents the design of a low-profile compact printed antenna for fixed frequency and reconfigurable bands. The consists main patch, four sub-patches, ground plane to generate five bands, at 0.92, 1.73, 1.98, 2.4, 2.9 GHz, different wireless systems. For fixed-frequency design, individual bands can be adjusted set independently over wide ranges 18.78%, 22.75%, 4.51%, 11%, 8.21%, respectively, using just one parameter antenna. By putting varactor (diode) each sub-patch inputs,...

This study presents an H-shaped reconfigurable antenna for wireless applications. The consists of H-shape radiator and a CPW printed on circuit board varactor diode connecting the upper lower arms reconfigurability. uniqueness lies ability to select operating mode frequencies electronically using diode. By selecting DC-bias voltages 11.5, 10 8 V across diode, which in turn selects corresponding capacitances 2, 4 6 pF, can be controlled operate three different modes, namely single-band cover...

Abstract Fifth generation (5G) envisages a “hyperconnected society” with an enormous number of interconnected devices, anywhere and at any time. Edge computing plays pivotal role in this vision, enabling low latency, large traffic volumes, improved quality experience. The advent 5G edge encourages vertical industries to develop innovative services, which can meet the challenging demands coming from consumers. However, economic feasibility is ultimate factor that determines viability new...

The manufacturing industry is regarded as one of the most demanding verticals with respect to URLLC requirements. A Device-to-Device (D2D) communication system a key enabler that has been introduced support URLLC. To enhance spectrum utilisation, D2D links can share access radio resources occupied by cellular users. Spectrum reuse may result in performance degradation due mutual co-channel interference co-existing and Resource sharing D2D-based network for wireless industrial applications...

Laser trackers are becoming the tool of choice for large volume dimensional metrology applications such as measurement aerospace assemblies, power plant structures, civil engineering structures and terrestrial transportation vehicles. A laser tracker is a portable coordinate measuring system that tracks moving target reflector measures position in spherical coordinates ( r , θ φ ). The metrological performance influenced by many factors including: compensation atmospheric effects, thermal...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The requirements for future DVB-T/H networks demand that broadcasters design and deploy provide ubiquitous reception in challenging indoors other obstructed situations. It is essential such are designed cost-effectively with minimized environmental impact. EC funded project PLUTO has since its start 2006 explored the use of diversity to improve coverage these difficult purpose this paper...

In this paper, we present a spectrum sharing scheme for Device to (D2D) deployments in wireless Internet of Things (IoT) industrial environment. Interference management relies on the relative distance between participating users or devices. The D2D links can access by resources with cellular using dedicated channels. presented maximises throughput admitted without compromising Quality Service (QoS) requirements network. An optimisation approach is adopted solve problem resulting an efficient...

Device-to-Device (D2D) communication systems will be a major driver for machine-type (MTC) in 5G networks because of their ability to facilitate the connection heterogeneous devices. feature smart environments with devices having differing Quality Service (QoS) requirements. In this paper, we formulate channel assignment and power control optimisation problem D2D-enabled cellular where users have different requirements namely high throughput (CUEs) low consumption D2D (DUEs). We propose...

Errors in the angle encoders of a laser tracker may potentially produce large errors long range coordinate measurements. To determine azimuth encoder and verify their values stored tracker’s internal error map, several methodologies were evaluated, differing complexity, measurement time need for specialised measuring equipment. These are: an artefact-based technique developed by NIST; multi-target network NPL; classical precision angular indexing table technique. It is shown that three agree...

A techno economic analysis for a C-RAN architecture in Crowded Events (CE) offering immersive video services (IVS) is presented. The shows that investments an IVS CE relying on edge cloud resources are viable with expected payback period of 6.5 years.

This paper proposes the use of smart (adaptive) antennas for HIPERLAN/2 (high performance radio local area network/2) standard in order to increase data rate and user capacity, targeting wired LAN replacement modern TV broadcasting studio environments. A 2D ray-tracing indoor channel model predicting propagation characteristics inside an arbitrary architecture wall properties is presented. An adaptive beamformer then developed case when number users equal array elements as well...

An efficient approach in modelling the ultra-wideband channel (UWB) by combining deterministic and statistic techniques is presented. The hybrid aims at lowering complexity of UWB indoor simple 2.5D ray tracing measurement statistics. A campaign an office environment reported. mean signal level rms delay spread values obtained from ray-tracing tool are compared with measurements several locations studied environment. Average statistical difference terms added to improve predictions. This...

This paper presents a novel approach for the estimation of local average signal level in an indoor environment based on wall imperfection model. A ray-tracing tool method images with angular information, is first used to estimate distribution field strength (or coverage) arbitrary environment. The concept spatial sampling highlighted. model then introduced study sensitivity received at location imperfect positioning and electromagnetic material properties. An alternative mean particular...

This paper presents a design of compact microstrip patch antenna with the ability controlling number bands and operating frequencies independently. The comprises main four sub-patches fed by 50 ¿ line. It is designed to generate up five separate modes cover frequency range from 900 MHz 3 GHz for operation wireless devices supporting multiple standards including Global System Mobile communication (GSM900, 880-960 MHz), Digital Communication (DCS1800, 1710-1880 Universal Telecommunication...

We report on the determination of laser tracker geometrical alignment and angular scale errors using a new geometric error model repeated measurements network fixed targets which are measured tracker, mounted in five different locations/orientations. After fitting to data, we able determine geometrical/angular with sufficient accuracy that previously un-calibrated can easily pass standard performance verification test, after being error-mapped our technique. Our technique uses no special...