Community Research and Development Information Service - CORDIS

Novel techniques increase accessibility of future wireless systems

EU-funded scientists successfully developed reliable and efficient spectrum sensing techniques that will be needed to meet the growing demand for more bandwidth for improved communications.
Novel techniques increase accessibility of future wireless systems
Cognitive radio is an adaptive, intelligent radio and network technology that optimises spectrum usage. Increasing flexibility of spectrum usage so that not many frequency channels remain unused most of the time, this technology enables more effective radio communications. However, two key challenges are to detect the underused parts of the frequency spectrum, and to devise efficient techniques for detecting which frequencies are clear that do not involve signalling between the primary and secondary users.

The EU-funded project S3ISE (Spectrum sharing systems for improving spectral efficiency) overcame obstacles related to spectrum sensing and resource allocation. Scientists devised novel techniques for exploiting the underused frequency bands without interfering with primary users.

Partners first investigated efficient resource allocation methods that reduce signalling overhead and computational complexity, and in a next step explored indirect signalling techniques between primary and secondary users. Results showed that the proposed methods retain the stability of the primary signal and offer channel capacity. These translate to lower-cost deployment of the radio spectrum and thus less charges to mobile users.

Scientists continued their work by developing efficient spectrum sensing techniques and optimal sensing parameters based on the deployment of spectrum sensors in the network. Based on these findings, the team further created a design of an overlay and underlay system using distributed system algorithm techniques. The proposed method proved to significantly enhance the throughput efficiency, eliminating the need for inter-system signalling.

Using novel approaches to address the bandwidth crunch, S3ISE led to innovations in spectrum optimisation. The new proposed methods intelligently detect which communication channels are in use and increase accessibility by moving secondary users into vacant channels, thus minimising interference with licensed users.

Related information

Keywords

Spectrum sensing, bandwidth, cognitive radio, spectrum usage, S3ISE, resource allocation
Record Number: 198931 / Last updated on: 2017-06-19
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top