In cognitive radio networks, the users are supposed to perform spectrum sensing with mush more accuracy to detect the more and more users. But in practice due to fading, shadowing etc., a long observation period of time is needed to make decisions based on detection which results in degradation of sensing performance. In this paper, we presented a new approach called Cuckoo Search for asynchron...

To sense the spectrum efficiently in heterogeneous multi-channel and multi-user cognitive network, a parallel cooperative spectrum sensing strategy based on genetic algorithm is proposed. It defines the expression of system utility considering the transmission gain and sensing overhead, and protects the primary user network by introducing the penalty function. To obtain the largest system utili...

In this paper, we describe methods for the analysis and design of Cooperative Object-oriented Information Systems. These methods involve users in the development of general Information Systems much more than traditional ones like Metrica or UML. We introduce a set of cooperative tools, based on a powerful and user friendly graphic interface that facilitates user participation in new stages of s...

—This paper considers an OFDMA-based cooperative cognitive radio network where the secondary users (SUs) act as the relay of the primary users (PUs) while guaranteeing the quality of service (QoS) of the PUs. In return, the SUs access the spectrum licensed to PUs in both time and frequency without impacting the communication of the PUs. A joint resource allocation problem is formulated to maxi...

We propose the use of cooperative communication among single-antenna users to enhance the performance of ultrawideband networks. We consider the amplify-and-forward cooperative protocol in the multiband OFDM setting using practical channel measurements.

This study is based on using the optimization problem of linear cooperative spectrum sensing (CSS) techniques for analysis and correlation allocation to secondary users (SUs) without interfering with operations primary users.

Cooperative Spectrum Sensing (CSS) is one of the proposed solutions to overcome the interference, path loss and shadowing effect. CSS is proposed also to enable secondary users to interact with the primary users by exploiting spatial diversity. However, cooperative sensing is also facing one major issue which is the energy consumption in transmitting the sensing reports to the fusion center esp...

This paper, by comparing three potential energy trading systems, studies the feasibility of integrating a community energy storage (CES) device with consumer-owned photovoltaic (PV) systems for demand-side management of a residential neighborhood area network. We consider a fully-competitive CES operator in a non-cooperative Stackelberg game, a benevolent CES operator that has socially favorabl...