Applications of Cognitive Radio Networks: Recent Advances and Future Directions

1Department of Information and Communication Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea 2Department of Computer Science, Texas Southern University, Houston, TX 77004, USA 3Department of Electric and Communication Engineering, Cankaya University, 06790 Ankara, Turkey 4Department of Electrical, Electronic and Power Engineering, Aston University, Birmingham B4 7ET, UK 5Department of Computer and Network Science, Telecom ParisTech, 75013 Paris, France