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Smart Locating Solutions

Locate. Control. Optimize.

Localization, control and optimization solutions.

Precise and updated location

Various technologies such as Bluetooth®, Wi-Fi, RFID, GPS are now the basis of geolocation devices and real-time location systems. These devices can be specific as in the case of GPS navigators or integrated in other devices that perform other tasks such as smartphones. Bluetooth®, Wi-Fi, RFID, GPS have pros and cons when compared to each other.

GPS has a location accuracy of up to 5 meters, with a large service coverage, is moderately sensitive to obstructions, requires other technologies for data communication and must be used externally.

RFID can be used outdoors and indoors, it is a passive device without the need for power, it has an accuracy from one centimeter to one meter and the typical coverage is about 25 m2.

Wi-Fi can be used outside and inside and has a position accuracy range between 5 and 15 meters while it is very sensitive to obstructions and interference; the coverage is typically 100 m2 per access point, the data communication speed reaches 1 Gbps and the latency to return a position in three dimensions is about 3 seconds.

Bluetooth® is very sensitive to obstructions and the accuracy is between 1 and 5 meters; the communication speed is up to 2 Mbit/s and the typical coverage is 25 m2 per beacon for an accuracy of about 2 meters.

During the last few years, low consumption and low cost microchips combined with an emerging new localization technology called UWB, Ultra Wide Band, make this technology the solution to localization and communication ultra reliable, ultra precise and in real time. UWB devices can be used outdoors and indoors, have a positioning accuracy of up to one centimeter, great resistance to multiple paths and interference, a coverage of about 250 m2 per anchor [1], high data communication speed up to 27 Mbit/s, low typical latency of less than 1 ms and simultaneous use of several tens of thousands of tags [2].

Figure 1.

Operational product, demonstration test.

IT architecture

The individual mobile devices, called [2] tags, update their positions by means of the signals of the RTLS UWB network with the fixed anchors [1]. Another AI-GW device [3] in UWB communication, acquires the positions of the [2] tags and executes algorithms specific AI, how to calculate the possible overlap of the respective security volumes and communicate specific acoustic, physical or visual alarms to the individual [2] tags concerned, or simply detect their position and forward the information to the management system.

Figure 2.

Knowledge is power

Knowing the exact position of any asset or human resource makes automation unthinkable until a few years ago possible. ShieldTech has a portfolio of applications ranging from child control in amusement parks to logistics control on construction sites and in the manufacturing sector. For the hospital sector, ShieldTech solutions allow medical staff to interact and connect with colleagues while helping them maintain a safe distance from patients.

Application fields and solutions

ShieldTech Care Studio

  • People distribution and balancing services
  • Covid-19

ShieldTech Human Resources

  • Child localization and control
  • Hazardous areas protection
  • Airport Services Assistants
  • Railway Services Assistance
  • Stadiums and Major Events Management
  • Emergency Automatic Appeals
  • Maintenance Teams Location

ShieldTech Accident Assessment Studio

  • Road Accidents Rapid Survey

Stadiums and concerts, Airports, Ports, Railway Stations, Shipyards, Playgrounds, solutions for every need.


Basic Web GUI

For the undemanding customer, without the need for reporting, a simple graphical interface accessible through any web browser. You can upload your own map to view the positions of your mobile tags in real time. Interface access is available, as well as with a PC, also via smartphone, tablet or smart TV.

Basic Web GUI interface.

ShieldTech Software Suite

For advanced users, ShieldTech Software Suite allows the widest customization. It is possible to load plants, maps and define multiple networks. Extensive reporting, remote and offline analysis capabilities. Various add-ons are available to manage the various application needs.

Custom add-ons from our programmers on demand.

Crowds control

It is possible to associate an arbitrary number of people to areas, with luminous signaling that the maximum set capacity has been reached.

Configuration module.

Offline reporting.


Devices to detect: tag

The devices to be detected, called tags, can be mobile or fixed. If it is necessary to identify an area based on a temporary presence, it is possible to attach a tag to a fixed support. The tag, in stationary configuration, will signal its presence allowing us to automatically establish areas without the need for any software changes.

Fixed references: Anchor

Fixed references, called Anchor, act as reference points for tags that will calculate their positions based on them. It is important to choose an Anchor number appropriate to the conformation of the area you want to cover. Although the most robust, reliable and performing technology is used, being a radio frequency transmission, it is necessary to evaluate the installation site with some accuracy, avoiding blockages in the Fresnel areas.

Process devices


This is the AI unit. Here are the basic control algorithms.

Deep Data Unit

A powerful SQL database stores data and makes them available for offline processing.


It is the element responsible for regulating data traffic between the localization network(s) and the IoT or local network.

Message Broker

It is the element that translates the proprietary signals and messages of the localization network into messages with standard MQTT protocol for maximum integration with the most diverse existing systems. It fully corresponds to Industry 4.0 requirements.


Unlike other technologies, such as Bluetooth or WiFi, which must be reworked for an unexpected purpose, the properties of the UWB RF signal have been specifically defined from the outset to achieve ultra-precise and real-time position and communication ultra reliable.

Technology Ultra Wideband logo
Bluetooth logo
WiFi logo
RFID logo
GPS logo
Places of use Outdoors/Indoors
Accuracy More or less ten centimeters
10 cm
From one to five meters
1–5 m
From five to fifteen meters
5–15 m
From ten centimeters to one meter
0,1–1 m
Five to twenty meters
5–20 m
Not very sensitive to interference and multi-path
Very sensitive to interference, obstacles and multi-path
Very sensitive to interference, obstacles and multi-path
Not very sensitive to interference and multi-path
Very sensitive to obstacles
Std. 70 m, max 250 m
Std. 15 m, max 100 m
Std. 50 m, max 150 m
Std. 1 m, max 5 m
Data rate
Up to 25 Mbit/s
Up to 2 Mbit/s
Up to 1 Gbit/s
(physical layer)
Time-distance tied protocol
Can be deceived by a relay attack
Can be deceived by a relay attack
Can be deceived by a relay attack
Less than 1 ms for xyz
Greater than 3 s for xyz
Greater than 3 s for xyz
About 1 s for xyz
About 100 ms for xyz
More than 10.000 tag
Between 100 and 1000 tag
Between 100 and 1000 tag
Consumption and battery 🔋
5 nJ/b TX - 9 nJ/b RX
Button cell
15 nJ/b TX/RX
Button cell
50 nJ/b TX/RX
Lithium battery
Lithium battery
Total costs
(infrastructure, maintenance, tags)
€€€ €€€ €€€

Fresnel zones

The line of sight of radio frequency transmissions is defined by the Fresnel zones. Augustin-Jean Fresnel was a French engineer and physicist who carried out important research in the optical field and, in particular, in physical optics.

Fresnel areas calculation is particularly useful in radio communications field for the definition of the grade of a radio frequency connection defining the disturbance caused by any obstacles in the physical path between transmitter and receiver.

Augustin-Jean Fresnel

Augustin-Jean Fresnel

Elissoide di Fresnel

Fresnel ellipsoid: line of sight is green coloured, D is the distance between transmitter and receiver, and r is the radius of the zone.


An electromagnetic wave propagates in a medium along the direction between transmitter and receiver. During the journey it encounters obstacles that generate multipath fading, that is a series of reflections and attenuations that cause delays and phase shifts that influence, in a constructive or destructive way, the final signal that reaches the receiver. Obstacles present in the first zone cause, for example, delays from 0° to 180°, in the second zone from 180° to 360°, and so on. In practice, the odd zones cause constructive interference, while the even ones cause destructive interference.

Formula for calculating radius of the Fresnel ellipsoid

Formula to calculate the radius of the first Fresnel zone where:
D is the distance between antennas and f is the frequency of the transmitted signal.