In this paper, we study the problem of resource allocation for a multiuser orthogonal
frequency-division multiple access (OFDMA) downlink with eavesdropping. The considered …

This paper considers the resource allocation problem in an orthogonal-frequency-division-
multiple-access (OFDMA)-based cognitive radio (CR) network, where the CR base station …

In this paper, throughput and energy efficiency of secure wireless transmission of delay
sensitive data generated by random sources is studied. A fading broadcast model in which …

In this letter, we consider a wiretap channel when a source node maintains two buffers
(queues) to store its data and secret key packets. We propose two medium-access protocols …

In this thesis, the problem of resource allocation is investigated in multiuser, multi-antenna
downlink wireless systems in which spatial multiplexing is employed in the physical layer …

Mobile data traffic has experienced unprecedented growth recently and is predicted to grow
even further over the coming years. As one of the main driving forces behind this growth …

This paper deals with the problem of sum rate maximization for a multiuser orthogonal
frequency-division multiple access channel with secrecy rate constraints. We consider the …