Cognitive radio is a recent technology that enhances the usage of spectrum resources.
Efficient assignment of unused spectrum to unlicensed users is an important problem …

Cognitive radio is a relatively new technology that improves spectrum utilization. The
efficient assignment of unlicensed users to unused spectrum is a major issue. Spectrum …

Cognitive radio (CR) has emerged as a promising technology to exploit the unused portions
of spectrum in an opportunistic manner. The fixed spectrum allocation of governmental …

Cognitive Radio (CR) is an advanced technology, which intends to boost the radio spectrum
utilization. On perceiving the spectrum holes, next there is a need to provide a fair …

With the advent of various emerging wireless products, the usage of limited spectrum has
grown exponentially in the recent years. In the next few years, that mobile data traffic …

The idea of Cognitive Radio (CR) is to share the spectrum between a user called primary,
and a user called secondary. Dynamic Spectrum Access (DSA) is a new spectrum sharing …

Cognitive radio networks significantly improve spectrum utilization efficiency by allowing
unlicensed users to opportunistically access the unused licensed spectrum. One of the key …

The cognitive radio is an emerging technology that enables dynamic spectrum access in
wireless networks. The cognitive radio is capable of opportunistically using the available …

Number of technologies has been developed in wireless communication and there is always
a common issue in this field ie 'Security'due to its open medium of communication. Now …

A cognitive radio (CR) is a radio that can change its transmission parameters based on the
perceived availability of the spectrum bands in its operating environment. CRs support …