VTT TECHNICAL RESEARCH CENTRE OF FINLAND LTD

VTT Technical Research Centre of Finland Ltd

UWB Radio and UWB ImpulseRadar Technology

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UWB Radio - High data rate wireless radiosystems with Real time location support

The technology achieves sufficient accuracy in distance measurementand in real time positioning. During the distance measurement andpositioning the UWB technology provides simultaneous wireless datatransmission up to 6.8 Mbit/s.The UWB radio technology has been applied in different applicationssuch as short-range communication, sensor networks systems and realtime location systems (RTLS).The UWB radio signals have an extremely wide bandwidth comparedto traditional radio signals, which offers several benefits; accurateranging, robustness to propagation fading, superior obstaclepenetration, resistance to jamming, interference rejection, and fluentcoexistence with traditional narrow bandwidth systems.

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UWB basics

Relatively immune todisturbances.Doesn’t disturb conventionalradio transmitters (powerlevel ca. 1 mW).Operational distance up to300 meters in open space.Very broad signal bandwidth,typically > 500 MHz.

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UWB Worldwide Regulations

Allowed frequency in areafrom 3,432 to 10,296 GHzdepending on country.Several countries andadministrations have adoptedunlicensed frameworks forUWB devices such as

North AmericaSouth AmericaEuropeMiddle EastAsia-Pacific countries

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UWB compared to other radio technologies

WiMedia

UWBWider range – Other applications

According to IEEE 802.15.46.8Mbps @ 100m110Kbps @ 300m

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Indoor positioning UWB TAG

UWB Loc_TAG• UWB Radio• BL 4.0 Radio

• Embedded softwareimplementing positioning anddata-transmission

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Basics of Impulse Radar technology

Utilises UWB bands3,1 – 10,6 GHz

Very low energy radiation-41,3 dBm/MHz

Relatively economic solution.One chip only.No moving parts.Measures only flying timee.g. distance, introducingdirection of measuredobjects need more antennas.A transmitter antenna is emitting very

short non-sinusoidal pulses.

Transmitted signals bandwidth is severalgigahertzes.

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UWB Impulse Radar

Immune to interference from other radio systems, to multipathpropagation, and to environmental factors like rain, fog, snow etc.Very broad signal bandwidth, several gigahertzesAbility to detect through obstacles and in dense mediaVery fast pulses -> Measures the environment even more than 400times per second with mm accuracy and maximum range of 10 - 15meters.It is easy to install and move from one place to another

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UWB Impulse Radar – Novelda chip

https://www.xethru.com/x2-uwb-radar-chip.html/

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Ultra-Wideband Radio

Methods, like imaging, laser-scanners, radars arecumbersome and not at all ideal solutions to theneeds.

Typically “soft” objects (humans, animals) are notvisible to today’s car-radars.

Operation in challenging environments (dust, rain,smoke).

Economics, implementations are far cheaper thancompeting ones.

Technology benefitsImmune to radio disturbances and signal fadingDoesn’t disturb conventional radio transmitters(power level ca. 1 mW).Operational distance < 100 meters.Very broad signal bandwidth, typically > 500 MHz.Very fast pulses -> great accuracy in positioningapplications.

Technology usage2D and 3D real-time positioning systems (RTLS)Positioning of humans in factories, warehouses etcDistance measurements, cylinders etc.Fast data transmission (->6,8 Mbit/s) in harsh env.Combined positioning and data transmission

Positioning of work machines Positioning of humans in buildings Operation in harsh environments VTT’s UWB module

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Ultra-Wideband Impulse Radar

Technology benefitsFast Impulses - > High resolution (mm)Independency from environmental factors (such asillumination, humidity, fog etc)Ability to 'see through' obstaclesOperational distance 10-15 meters.Measurements even 400 times per second

Technology usageHealth monitoring and Rescue - Heart and breathrate monitoringSafety – Detecting of objects (human and non-human) around a working-machineAutomation - Enabling automatic, or self-automaticwork process; Assisting drivers in challengingenvironments (dust, rain, etc.), Warnings ofapproaching objects, or machine approaching wallsand other obstacles, High accuracy ranging

Wireless health monitoring. Enabling automatic, or semi-automatic work-phases. Hugh accuracy distance measurements Detection of foreign objects onconveyer belt

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