Published on in Vol 15, No 8 (2013): August
1 Instituto de Telecomunicações, University of Beira Interior, Covilha, Portugal
2 University of Valladolid, Bilbao, Spain
*these authors contributed equally
Published on in Vol 15, No 8 (2013): August
1 Instituto de Telecomunicações, University of Beira Interior, Covilha, Portugal
2 University of Valladolid, Bilbao, Spain
*these authors contributed equally