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The advent of simultaneous wireless information and power transfer (SWIPT) offers a promising approach to providing cost-effective and perpetual power supplies for energy-constrained mobile devices in heterogeneous cellular networks (HCNs). As energy efficiency (EE) has been envisioned as a key performance metric in 5G wireless networks, we consider a multiple-input single-output (MISO) femtocell...
In this paper, we study hybrid overlay/underlay spectrum sharing in cognitive two-way relay networks with an opportunistic relay selection scheme. Different from the traditional interference power constraint, we adopt primary users' (PU) outage constraints to guarantee the QoS requirement of a primary system. The exact closed-form expression for the outage probability of a secondary system is derived...
Enhancing system throughput and improving user fairness are two basic but contradictory objectives for resource allocation in wireless cellular networks. To obtain an efficient tradeoff between these two goals, Network Utility Maximization (NUM) framework has been adopted with log-utility to obtain proportional fairness among all the users in the network. However, such tradeoff can not control the...
In this paper, some recent research advances in compact ultra-wideband antenna with multiple stop bands for UWB wireless communications or shared for multiple wireless communication systems are reviewed.
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