Spectrum sensing in single channel and multi-channel cognitive radio networks

Abstract

<p>Sensing the existence or absence of primary user is the major chore of cognitive radio networks. Nevertheless, Spectrum sensing is the core process of cognitive radio and with target to find idle channels.Various detection techniques exist, however, energy detection is considered as the most used detector because of its lower computational cost. In this paper, we proposed a study of throughput for a cognitive radio system. We had two scenarios, in the first scenario; a study of throughput against probability of false alarm was done; where, only one channel is sensed, to maximize the individual channel throughput. In the second scenario, multi-channel is sensed to maximize the overall system capacity. In addition, different number of channels is considered with different sensing times and at different throughput costs.The performance of the network has been investigated in terms of maximum throughput for optimal number of CR channels. </p>

Spectrum sensing and energy detection in cognitive networks

“…Resource sharing has common challenges with heterogeneous networks. Although densification has observable limits for microwave frequencies, it is shown that denser deployments are advantageous for mmWave bands because of their different propagation characteristics for non-line of sight NLoS and line of sight LoS environments [21,22]. Network sharing has evolved from a novel concept a few years back with the arrival of the third generation (3G) networks to a fundamental feature of the emerging 5G systems.…”