Members bring a broad base of experience in Software Defined Radio (SDR), Cognitive Radio
(CR) and Dynamic Spectrum Access (DSA) technologies in diverse markets and at all levels of the wireless value chain to address emerging wireless communications requirements.
In this paper, we have studied a broadcast underlay cognitive radio
network as a closed loop multiple antenna system with dirty paper coding scheme under Nakagami-m and Rician fading channels.
(CR) is a promising technology to alleviate the spectrum scarcity problem [1-3].
In classical Cognitive Radio
(CR) system, Primary User (PU) and Secondary User (SU) can share the same frequency band but not simultaneously.
The cognitive radio
network (CRN) has become a key solution for inefficient spectrum utilization due to its dynamic spectrum sharing.
network (CRN) is a way for secondary users (SUs) to exploit the spectrum holes of the primary user (PU) for better utilization .
Such pressure on the available spectrum could be alleviated through the adoption of Cognitive Radio
technology is proposed to solve these current spectrum inefficiency problems.
ABSTRACT: The problem of inefficient use of spectrum and concept of opportunistic spectrum access gives rise to the idea of designing cognitive radios
. This report summarizes the concept of cognitive radio
and why they are becoming a necessity.
In this context, one of the prime areas of research is cognitive radio
, which enables efficient use of wireless spectrum .
Introduction to Cognitive Radio
Networks and Applications