CEA-Leti Obtains Test Licence to Validate Innovative Wireless Technologies in Television White Space (TVWS)


GRENOBLE, France – Jan. 22, 2012 – CEA-Leti, which has developed opportunistic radio technologies (or cognitive radio) since 2005, is the first research center in France to be granted a government licence to experiment with television white space equipment in the field.

The license application stemmed from the innovative wireless cognitive radio systems developed by Leti's Communication and Security Department (STCS). Cognitive radios are able to dynamically allocate and exploit spectral resources to optimize wireless communication networks' capacity and/or the quality of service (QoS). Although this dynamic spectrum management is not allowed in France yet, this paradigm is seen by many stakeholders as an efficient means to de-saturate the crowded radio spectrum.

In the U.S., unlicensed opportunistic spectrum usage has been authorized in the free channels of the television spectrum (the Television White Space – TVWS) by the Federal Communications Commission (FCC). The service envisioned by the FCC is a long-range WIFI system, called super-WIFI.

Ongoing studies have been evaluating whether a similar paradigm could be applied in Europe, for instance in the framework of the SE43 group of the European Conference of Postal and Telecommunications Administrations (CEPT). The technology developed by Leti can be applied in both Europe and the U.S.

The STCS department's cognitive radio research focuses on two fundamental issues related to dynamic spectrum access (DSA). These are free-channel detection and flexible high-spectrum-efficiency communication systems with a low power leakage in the adjacent channels, known as adjacent channel leakage ratio (ACLR). Many applications are envisioned because the radio propagation at TVWS frequencies (470 to 780MHz) – the so-called "golden frequencies" – is excellent for outdoor or outdoor/indoor applications. This is a key asset in comparison to typical WIFI frequencies (2.4 or 5.4GHz) that opens the way to new application opportunities: home networking, campus networks, intelligent cities, public safety, etc.

Leti's TVWS experiments will validate the innovative low ACLR radio for urban and indoor-to-outdoor scenarios, in order to quantify the improvements in terms of system capacity and coexistence with incumbent radio systems.

About CEA-Leti

Leti is an institute of CEA, a French research-and-technology organization with activities in energy, IT, healthcare, defence and security. Leti is focused on creating value and innovation through technology transfer to its industrial partners. It specializes in nanotechnologies and their applications, from wireless devices and systems, to biology, healthcare and photonics. NEMS and MEMS are at the core of its activities. An anchor of the MINATEC campus, CEA-Leti operates 8,000-m² of state-of-the-art clean room space on 200mm and 300mm wafer platforms. It employs 1,700 scientists and engineers including 240 Ph.D. students and 200 assignees from partner companies. CEA-Leti owns more than 1,880 patent families.

For more information, visit www.leti.fr.