A Smart and Secure Wireless Communication System: Cognitive Radio
Shrikrishan Yadav1, Santosh Kumar Singh2, Krishna Chandra Roy3

1Shrikrishan Yadav, CSE Department, PAHER University, Udaipur, India.
2Santosh Kumar Singh, IT Department, Gyan Vihar University, Jaipur, India.

3Prof. Krishna Chandra Roy, ECE Department, PAHER University, Udaipur, India.
Manuscript received on February 09, 2012. | Revised Manuscript received on February 14, 2012. | Manuscript published on March 05, 2012. | PP: 78-81 | Volume-2 Issue-1, March 2012. | Retrieval Number: A0382012111/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: 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.
Keywords: Decryption, Encryption, Primary User, Radio Frequency Spectrum, Secondary User, Spectrum Analysis