From cognitive systems to persons

Cognitive radio networks can be designed to manage the radio spectrum more efficiently by utilizing the spectrum holes in primary user's licensed frequency bands. The currently available unlicensed spectrum is reaching its limit and various demands for ...

Cognitive radio technology increases spectrum utilization by enabling secondary users to opportunistically use the spectrum when primary users are inactive. Secondary users use spectrum sensing to detect the presence of primary users in order to avoid ...

Radio spectrum is a precious and limited resource for wireless communication networks. The proposed Always Transmit (AT) strategy in cognitive radio is a precious solution to overcome the inefficient spectrum allocation policy, since secondary user (SU) ...