Spectrum scarcity demands for additional bandwidth where new services can be deployed
on. However, today's spectrum allocation leaves almost no bands unallocated. Thus …

Tiered networks have been introduced to mitigate the issues related to poor cellular
coverage in dead zones and indoor environments. However, the large-scale deployment of …

The base station (BS) equipments and downlink transmission consume the major energy of
cellular networks. For the 5G network, the large amount of antenna elements of massive …

Heterogeneous two-tier network with hybrid deployed small cells and macrocells is a
promising solution for fifth generation (5G) wireless networks. However, with the higher and …

We study the performance of a cognitive small cell network, catering multicast services to
multiple groups of secondary users, using a pre-assigned set of orthogonal channels of …

The deployment of low-power nodes such as femtocells within the macrocell's coverage
area is one of the main features of future 5G networks. However, challenges arise in the …

The investments in indoor mobile networks are highly related to the spectrum availability
and its associated authorization options. The aim of this paper is to discuss the differences in …

In cognitive radio (CR) system, secondary user (SU) should use available channels
opportunistically when the primary user (PU) does not exist. In CR network, SUs have to …

The deployment of femtocells in current and future communication systems promises an
effective solution for limited indoor coverage problem and a possible gateway for mobile …

In this paper, we propose a new diversity-oriented space-frequency block codes (SFBC) and
signal alignment (SA) enabled physical network coding (PNC) method for the uplink of …