Radio spectrum is being underutilized. Cognitive Radio acts as a solution to the problem of
spectrum under-utilization. Spectrum sensing is the most important feature of Cognitive …

In this paper, we tackle the issue of cooperative spectrum sensing in cognitive radio network
with path loss effects. Cooperative relays are introduced between primary user and cognitive …

The growing demand for high-bandwidth wireless technologies has led to spectrum scarcity,
which limits the available bandwidth for wireless communication. Licensed spectrum …

In this paper, we propose an Eigenvalue and superposition approach based cooperative
spectrum sensing scheme: firstly, we calculated the Eigenvalue from the received …

In this paper, we study the cognitive radio networks where the primary users transmit data
with multiple power levels. A cooperative sensing algorithm with soft combination based on …

In cognitive radio networks, secondary users are allowed to access the under-utilized
spectrum and opportunistically transmit whenever no primary signals are detected. So these …

Cognitive Radio (CR) can be viewed as a novel approach to improve the overall Spectrum
utilisation. In a CR, the most challenging operation is to detect the presence of any unutilized …

Enhancing the current services or deploying new services operating in RF spectrum
requires more licensed spectrum which may not be provided by the regulatory bodies …

In cognitive radio networks, secondary (unlicensed) users opportunistically access vacant
frequency bands licensed to primary users. Spectrum sensing is the technique exploited to …

We considered the problem of use the reliability of unlicensed users for cooperative
spectrum sensing in cognitive radio systems by analyzing the Huffman encoding algorithm …