期刊名称：International Journal of Soft Computing & Engineering
电子版ISSN：2231-2307
出版年度：2012
卷号：2
期号：1
页码：78-81
出版社：International Journal of Soft Computing & Engineering
摘要：Trust is an important concept in human interactions which facilitates the formation and continued existence of functional human societies. The radio frequency spectrum is a limited natural resource and hence its efficient use is of the greatest importance. Cognitive radio is a smart wireless communication system that is conscious of its surrounding environment, learns from the environment and adapts its internal states by making corresponding changes in certain operating parameters in real time. In this paper, we search the adaptive characteristics of cognitive radio in secure and reliable communication. But how a communication system can be made reliable such that there occur no eavesdropping and information leakage. The possible solutions include integrating the merits of spread spectrum modulation, using encryption algorithms and it’s potential to switch over various frequency bands. In the development of future wireless communication systems, the spectrum utilization will play an important key role due to the shortage of unallocated spectrum. The main tasks of the cognitive radio are to provide highly reliable communications whenever and wherever needed and how to utilize the radio spectrum efficiently. Cognitive radio can be the best communication system in an emergency condition as Earthquake, flood and Tsunami etc when all communication systems are failed to provide information and to communicate each other.
