“…Fabrício P. V. de Campos is with Electrical Engineering Program,COPPE/Federal University of Rio de Janeiro 68504, 21945-970, Rio de Janeiro, RJ, Brazil E-mail: fcampos@lps.ufrj.br.This paper was supported in part by FAPEMIG, CNPq, CAPES, CAPES-PNPD, FINEP, P&D ANEEL, and INERGE. through a capacitive coupler or on an antenna [4], [7], [8]. Cooperative spectrum monitoring techniques are adequate to detect radio frequencies when the signal is measured directly on the power line cable [3].…”