Blind Modulation Classification for Cognitive Satellite in the Spectral Coexistence Context

Automatic Modulation Classification and Blind Equalization for Cognitive Radios

Cognitive Interference Alignment for Spectral Coexistence

Interference Alignment (IA) has been widely recognized as a promising interference mitigation technique since it can achieve the optimal degrees of freedom in certain interference limited channels. In the context of Cognitive Radio (CR) networks, this technique allows the coexistence of two heterogeneous wireless systems in an underlay cognitive mode. The main concept behind this technique is t...

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING Cognitive Beamhopping for Spectral Coexistence of Multibeam Satellites

Herein, the spectral coexistence scenario of two multibeam satellites over a common coverage area is studied where a primary satellite produces larger beams while a secondary satellite has smaller beams. A novel cognitive beamhopping satellite system is proposed assuming that the secondary gateway is aware of the primary’s beamhopping pattern. The performance of the proposed system is evaluated...

Modulation Classification in Cognitive Radio

The automatic modulation classification (AMC) problem aims at identifying the modulation scheme of a given communication system with a high probability of success and in a short period of time. AMC has been used for decades in military applications in which friendly signals should be securely transmitted and received, whereas hostile signals must be located, identified and jammed (Gardner, 1988...

Spectral Utilization and Coexistence Strategies in Cognitive Radio Devices

One of the main limitations in next-generation wireless systems is bandwidth scarcity. Nowadays, most of the spectrum is allocated to specific applications by the Federal Communications Commission (FCC); however, statistics shows the spectral utilization is low in most of the reserved ranges. So, trying to use the idle bandwidth and let the secondary users to communicate when the channel is fre...