Cognitive radio (CR) systems allow unlicensed secondary users to transmit on the licensed frequency bands without degrading the licensed primary transmissions. Combining CR with other emerging transmission techniques, such as user cooperation may have many benefits on both the primary and secondary transmissions. In this study, the authors propose and investigate an adaptive relay-based coopera...

The aim of this paper is to demonstrate that by employing relaying and using the remaining battery lifetime information of Mobile Terminals (MT) in next generation cellular networks, the outage probability of the MT is reduced. We define outage probability as the probability that the connection between the MT and the Base Station (BS) is lost when the MT is asked to use a transmission power gre...

A novel admission control (AC) policy is proposed for the uplink of a cellular CDMA beamforming system. An approximated power control feasibility condition (PCFC), required by a cross-layer AC policy, is derived. This approximation, however, increases outage probability in the physical layer. A truncated automatic retransmission request (ARQ) scheme is then employed to mitigate the outage probl...

We consider a game-theoretic power control algorithm in interference limited fading channels, where we propose a distributed (non-cooperative) algorithm to optimize the induced fading outage probability by maximizing the certainty equivalent margin (CEM). We prove that the problem of maximizing CEM is the same (up to an upper bound) as minimizing the induced outage fading probability, and provi...

Employing Dual Polarized antenna plays a vital role for the future generation MIMO systems due to its advantages such as space effectiveness and robustness. In this paper, we provide Outage probability of Multiuser Dual Polarized antenna in an uplink environment. Specifically, we provide the simulation results of Outage Probability for different varying parameters such as an increase in a numbe...