International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 04 | Apr 2023
p-ISSN: 2395-0072
www.irjet.net
Methods for Detecting Energy and Signals in Cognitive Radio: A Review Ayushi1, Dr. Priyanka Jaiswal2 1M.Tech, Electronic and Communication Engineering, GITM, Lucknow, India
2Professor Electronic and Communication Engineering, GITM, Lucknow, India
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Abstract - Cognitive radio is an emerging technology that
allows for dynamic and adaptive use of the radio spectrum by wireless communication devices. The technology has gained significant attention in recent years due to its potential to address the increasing demand for wireless communication and the scarcity of available radio spectrum. In this review paper, we provide a comprehensive overview of cognitive radio technology, including its principles, architecture, and key components. We also discuss the major challenges and research directions in cognitive radio, such as spectrum sensing, channel selection, and security. Furthermore, we provide a survey of the recent advances and applications of cognitive radio in various domains, such as military communication, emergency response, and commercial communication. Finally, we conclude the review paper by summarizing the key findings and identifying the future research directions in cognitive radio. This review paper provides a valuable resource for researchers and practitioners interested in cognitive radio technology and its applications.
Figuew-1: cognitive radio
1.1. Principle of Cognitive Radio
Key Words: Cognitive radio, Wireless communication, Radio spectrum, Dynamic spectrum access, Spectrum sensing, Channel selection, Interference mitigation
The principle of cognitive radio is to enable wireless devices to intelligently and dynamically adapt to their environment and make efficient use of available radio frequency spectrum. The technology operates on the principle of "dynamic spectrum access," which allows cognitive radio devices to detect and use available frequency bands in realtime.
1. INTRODUCTION Cognitive radio is a type of wireless communication system that enables devices to use available radio frequencies dynamically and adaptively. It is also known as softwaredefined radio because it uses software to change the frequency, modulation, or other characteristics of the radio signal. The technology was developed to address the growing demand for wireless communication and the increasing scarcity of available radio spectrum.
The key principles of cognitive radio include: Spectrum sensing: Cognitive radios are designed to detect and monitor the frequency spectrum, identifying available frequency bands that can be used for communication. Spectrum management: Once an available frequency band is detected, cognitive radios can use algorithms to dynamically and automatically select the best frequency band for communication, optimizing system performance.
The cognitive radio technology allows devices to sense the radio spectrum, analyze the available channels, and select the best frequency for transmission based on the quality of the signal, the bandwidth availability, and the interference level. This dynamic and adaptive use of the radio spectrum can improve the efficiency and performance of wireless communication systems, as it allows them to utilize underutilized frequency bands, avoid interference, and improve spectrum utilization.
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Impact Factor value: 8.226
Interference management: Cognitive radios can detect interference from other wireless devices and adjust their operating parameters to avoid interference and improve network performance. Spectrum sharing: Cognitive radios can share available frequency bands with other wireless devices, including licensed users, without causing interference, allowing for more efficient use of spectrum.
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