About the Authors

A. Brahim

Affiliation Department of Signal Theory, Networking and Communications, University of Granada, Granada, Spain

J. Ramírez

Affiliation Department of Signal Theory, Networking and Communications, University of Granada, Granada, Spain

J. M. Górriz

gorriz@ugr.es

Affiliation Department of Signal Theory, Networking and Communications, University of Granada, Granada, Spain

L. Khedher

Affiliation Department of Signal Theory, Networking and Communications, University of Granada, Granada, Spain

D. Salas-Gonzalez

Affiliation Department of Signal Theory, Networking and Communications, University of Granada, Granada, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AB JR JMG LK. Performed the experiments: AB JR JMG LK. Analyzed the data: AB JR JMG LK. Contributed reagents/materials/analysis tools: AB JR JMG LK DSG. Wrote the paper: AB JMG JR.