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Cognitive Radio in 4G/5G Wireless Communication Systems
Additional information is available at the end of the chapter Wireless communications and the necessity of cognitive radio Wireless communication systems play a special role in human life, facilitate the life, and change the world much more in the future. The diversity of applications and services of wireless communications indicates the widespread use of wireless systems and equipment in the future. Since the first radio link by Marconi in 1896, it has been more than 120 years, and severaldoi:10.5772/intechopen.82033 fatcat:cwflydi5qrbobk2lmpyxzqvdfe