comment on this article

Successful field trials for multicarrier system

French research insitute Leti and CloudNet IT-Solutions, a Scottish SME that specialises in TV white space (TVWS) communications, have held field trials and published results for a new flexible multicarrier system.

The trial, carried out in the Orkney Islands, was designed to demonstrate a post-OFDM (orthogonal frequency-division multiplexing) multicarrier waveform.

The trial showed the waveform – a block filtered-OFDM (BF-OFDM) – can overcome all shortcomings inherent in OFDM waveforms (WiFi/LTE) and is backward compatible with existing receivers.

“The results of these field trials enhance Leti’s technology-to-system offer for its industrial partners in the context of telecom applications and ad-hoc proprietary radio solutions for vertical sectors,” explained Dimitri Ktenas, Leti's wireless lab manager. “Our patented technology unlocks the usage of spectrum sharing, such as License Shared Access in TVWS and Citizens Broadband Radio Service at 3.5GHz.”

Leti was granted in an 18-month license from Arcep, France’s telecommunications regulatory agency, in January this year, to run a field trial with multiservice transmission at 3.5 GHz TDD band, and is continuing to deploy its patented multicarrier technology on broadband wireless channels.

In the Orkney Islands field trial, Leti demonstrated the flexibility of the technology in terms of spectral efficiency in the 700MHz TVWS band for rural broadband and maritime broadband radio scenarios. The measurements were supported under the framework of the H2020 EU-funded GateOne project.

Leti’s post-OFDM multicarrier waveform is designed to achieve good frequency localisation and support simultaneous single-carrier and multicarrier modulations, along with classical multi-antenna systems, including MIMO solutions.

The duration of the elementary communication slot is configurable and can be adapted to the targeted latency and channel conditions. In addition, classical multi-user (MU) access can be used on top of it, and even combined with MIMO, leading to MU-MIMO technologies in fragmented spectrum scenarios.

The Orkney Islands deployment assessed performance of a broadband transmission in a 16MHz fragmented spectrum channel, while fitting with ETSI EN 301 598 TVWS regulation. The measurements performed at the beginning of November strongly validated the trial’s concepts in a real-life situation and rural broadband content delivery was demonstrated up to 20km, using non-contiguous channels.

Leti’s over-the-air portable test platform based on field-programmable gate arrays (FPGA), ARM processors and agile RF front-end was used to demonstrate a broadband transmission. The same set of equipment is also part of the 5G Leti testbed under evaluation in the future 5G 3.5GHz band.

Author
Neil Tyler

Comment on this article


This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:


Add your comments

Name
 
Email
 
Comments
 

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

Semi boom not over

After a blistering 2017, it looks like the semiconductor industry will see ...

Driving innovation

Oxford University has a reputation not only as an internationally recognised ...

A tipping point

The Telecommunications Infrastructure Project is looking to apply open source ...

Wi-Fi module

A 2.4GHz 802.11b/g/n fully embedded standalone Wi-Fi module has been launched ...

MicroTech 2018

On April 9-10, 2018 the MicroTech exhibition will be held at the Royal Holloway ...

ElectroTest Expo

The ElectroTest Expo will be held in March 14, 2018 at the Towcester racecourse.

Boosted NFC

This video provides a brief introduction on how ams' boostedNFC technology ...

Tech trends

Last year was a busy one for technology and 2018 is unlikely to be any ...

Mobile slowdown

With just under a week to go before Apple launches its new iPhone the press has ...

Shaping the future

Alexander Everke, the CEO of ams, started his career in the semiconductor ...

The project begins

Recently, Stephen Doran took up his position as CEO of the Compound ...