Time-critical and delay-sensitive multimedia applications require more spectrum and
transmission resources. With the provision of cognitive radios (CRs), the underutilized …

Wireless networks with their ubiquitous applications have become an indispensable part of
our daily lives. Wireless networks demand more and more spectral resources to support the …

Software Defined Radio (SDR) and Cognitive Radio (CR) are promising technologies, which
can be used to alleviate the spectrum shortage problem or the barriers to communication …

The year 2009 marked the 10th anniversary of Mitola and Maguire Jr. introducing the
concept of cognitive radio. This prompted an outpouring of research work related to CR …

The stringent requirements of wireless multimedia transmission lead to very high radio
spectrum solicitation. Although the radio spectrum is considered as a scarce resource, the …

In order to improve utilization of TV spectrum, regulatory bodies around the world have been
developing rules to allow operation by unlicensed users in these bands provided that …

Network coding (NC) is a technique used for effective and secure communication by
improving the network capacity, throughput, efficiency, and robustness. In NC, data packets …

The cognitive radio (CR) paradigm for designing next‐generation wireless communications
systems is becoming increasingly popular, and different aspects of it are being implemented …

Cognitive radio has been proposed as a promising technology to resolve the spectrum
scarcity problem by dynamically exploiting underutilized spectrum bands. Cognitive radio …

Cognitive radio system (CRS) is a radio system which is aware of its operational and
geographical environment, established policies, and its internal state. It is able to …