Abstract-Radio intelligence is a novel approach in wireless communication systems it arises to solve the current saturation of the spectrum. There are three access schemes for intelligence radius: interweave, underlay and overlay. The overlay scheme may allow higher transmission speeds and bandwidth through the application of mitigation techniques or management interference. Through these techniques the quality and efficiency of transmission is guaranteed. This paper presents a study and analysis of these techniques that may be implemented in future wireless communication systems. The characteristics of some of the most common techniques to mitigate interference in the overlay schemes for radio intelligence systems are analyzed.The simulation results are presented in terms of bit error for overlay systems using pre-coding techniques and spatial filtering show the good performance of these techniques in wireless communication systems.Keywords-dynamic spectrum access, interference, overlay, radio intelligence. Digital Object Identifier (DOI): http://dx