What is cognitive radio applications?
Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which ones are not. The transceiver then instantly moves into vacant channels, while avoiding occupied ones.
What type of antenna is used in cognitive radio?
] a quad-band antenna for cognitive radio is presented. It has a direction radiation pattern in four frequency bands, covering most of the spectrum used for existing wireless applications. MEMS switch is used to adjust the operating frequency of the quad-band antenna.
Which process can be done by cognitive radio?
Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not. It instantly moves into vacant channels while avoiding occupied ones. It does not cause any interference to the licensed user.
What is SDR in cognitive radio?
Software-defined Radio & Cognitive Radio SDR is a wireless platform implementation whose functionality is based almost entirely in executable software, as opposed to conventional wireless devices, where both the digital signal processing and digital communication algorithms are implemented using integrated circuits.
What is spectrum hole?
In the context of cognitive radio, secondary users opportunistically exploit the existence of spectrum holes to improve spectrum utilization. A spectrum hole is a licensed frequency band that is not being used for some time period usually in a specific area [11].
What are the limitations of cognitive radio?
Drawbacks or disadvantages of Cognitive Radio ➨It always requires multi band antenna. ➨Security concern: There are more chances open for attackers in cognitive radio technology compare to traditional wireless networks. The data may be eavesdropped or altered without notice.
Which of the following are advantages of cognitive radio?
5 Advantages of Cognitive Radio
- Overcome radio spectrum scarcity.
- Avoid intentional radio jamming scenarios.
- Switch to power saving protocol.
- Improve satellite communications.
- Improves quality of service (QoS)