News

SEPTEMBER 2011 - Participation in the SE43 Group Meeting - 11th SE43 group meeting, in Lisbon, on September 19th, 2011.

Rogério Dionísio (project COGEU) attended the 11th SE43 group meeting, in Lisbon, on September 19th, 2011.

He presented the results of SEAMCAT simulations of interference potential from LTE-type WSD into incumbent services/systems (Document SE43(11)Info12). For the computation of exclusion zones for DVB-T receivers, two techniques were evaluated, one based on a geolocation database approach, and the other using autonomous sensing. For the PMSE protection, three scenarios were evaluated, with indoor and outdoor propagation conditions and a single portable TVWS device as the interferer. In particular, the exclusion distance to protect DVB-T receivers from LTE BS and LTE UE is found to be 16 km and 4.5 km, respectively. The exclusion distance to protect PMSE equipment is calculated to be within the range 1.2-13.9 km depending on the channel offset.

The presentation received a good feedback from the audience. SE43 noted that different protection criteria and approaches in defining the maximum power for WSDs are used in SE43 and in the presented study. It was further noted that the choice of parameters influences greatly the results. Some questions and comments were raised concerning the propagation model that is used to simulate the interference scenario between PMSE receivers (primary user) and portable TVWS devices (secondary users), and also the value used for the walls attenuation.

Note: SE43 is a Spectrum Engineering working group, from CEPT, responsible for defining technical and operational requirements,
for the possible operation of cognitive radio systems in the ‘White Spaces’ of the frequency band 470-790 MHz. More info in: http://www.cept.org/ecc/groups/ecc/wg-se/se-43