In recent years, the usage of wireless devices and wireless service has been increased
exponentially and it results in spectrum scarcity. The policies of regulatory authority employ …

Cognitive radio network (CRN) is a pioneering technology that was developed to improve
efficiency in spectrum utilization. It provides the secondary users with the privilege to …

Around the world static allocation of spectrum scheme is commonly used which is allocated
to specific technology based services, such as mobile, fixed, broadcast, fixed satellite and …

In wireless communication system, the radio spectrum is one of the biggest resource
constraints with limited availability in nature. To regulate the use of this limited resource …

The rising number and capacity requirements of wireless systems bring increasing demand
for RF spectrum. Cognitive radio (CR) system is an emerging concept to increase the …

Natural frequency spectrum is scared resource; the efficient use of it can only accommodate
the need of future computing world. But efficient use of it is not possible within the existing …

Cognitive Radio has emerged as a promising technology to improve the spectrum utilization
efficiency and overcome spectrum scarcity problem by performing an opportunistic access to …

The electromagnetic spectrum is a meager resource of nature. The current standing
spectrum allocation policy is unable to put up the demands of wireless communication. This …

With today's increase in the usage of wireless devices and the consequent spectrum
allocation, radio spectrum is becoming scarce. In practice most of the allotted spectrum is not …

Day by day, the demand for wireless systems is increasing while the available spectrum
resources are not sufficient. To fulfil the demand for wireless systems, the spectrum hole …