TY - CONF T1 - Wideband Spectrum Sensing in Cognitive Radio: Joint Estimation of Noise Variance and Multiple Signal Levels T2 - IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Y1 - 2009 A1 - R. López-Valcarce A1 - Gonzalo Vázquez-Vilar JF - IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC) CY - Perugia, Italy ER -