Spectrum scarcity and the inefficient use of the electromagnetic spectrum motivated the
development of Cognitive Radio (CR), which aims to extend the spectral efficiency, with …

To analyze any communication signal, knowing the type of modulation is an important topic.
Hence, Adaptive modulation identification has gained great importance in various …

Spectrum scarcity is a critical problem that may reduce the effectiveness of wireless
technologies and services. To address this problem, different spectrum management …

Systems comprised of Cognitive Radio Networks (CRN) have been gaining attention in the
current literature, given their ability to reduce spectrum scarcity by reusing parts of the …

In this paper, we study the performance of multiuser cognitive networks with multiple primary
users and imperfect channel estimation. Two scenarios are considered: primary users with …

In recent years, adaptive modulation and adaptive FEC techniques have received
considerable attention for improving the performance of wireless networks. The analysis of …

The N th-best user selection scheme is efficient in outdated channel information conditions
where the user that was the best at the selection time instant could not be the best at the …

This work investigates the performance of a network that combines cognitive radio and the
adaptive forward error correction technique, where access to the medium is done …

Abstract The reconfigurability in Cognitive Radio (CR) facilitates to dynamically change its
parameters for the efficient spectrum utilization. The motivation behind the study of cognitive …

PURPOSE: to measure the quality of life (QoL), either by a specific dermatology or generic
self applied questionnaire, in Atopic dermatitis adult Brazilian patients, looking for selected …