Recent Advances on Wideband Spectrum Sensing for Cognitive Radio.- Complexity of Spectrum Activity and its effect on Opportunistic Access.- Analysis and Optimization of Energy Detection for Non-Flat Spectral Characteristics.- Spectrum Sensing Algorithms for Cognitive White-Space Systems.- New Blind Free Bands Detectors Exploiting Cyclic Autocorrelation Function Sparsity.- Intersystem Coexistence and Cooperation Through Cognitive Control Channels.- Cooperative Spectrum Sensing with Censoring of Cognitive Radios in Rayleigh Fading Under Majority Logic Fusion.- Medium Access Control in Cognitive Impulse Radio UWB networks.- Integration of Heterogeneous Spectrum Sensing Devices Towards Accurate REM Construction.- Cellular Coverage Optimization: A Radio Environment Map for Minimization of Drive Tests.- Use of Learning, Game Theory and Optimization as Biomimetic Approaches for Self-Organization in Macro-Femtocell Coexistence .- Detection of Primary user Emulation (PUE) Attacks Based on Cooperative Localization.- Cognition as a tool for Green Next generation Networks.- Testbeds and Implementation Issues.