In a cellular network it's very difficult to make spectrum resource more efficiently. Device-to-
Device (D2D) technology enables new service opportunities, and provides high throughput …

In this paper, three novel techniques are proposed and investigated for multiple relay
selection in dual hop OFDM networks. These techniques are based on the exploitation of …

Underlay cognitive networks should follow strict interference thresholds to operate in parallel
with primary networks. This constraint limits their transmission power and eventually the …

The broadcast nature of wireless communications makes it difficult to hide transmitted
signals from unauthorized users. To this end, physical-layer security is emerging as a …

This paper analyzes a closed-form outage probability of opportunistic amplify-and-forward
(AF) orthogonal frequency division multiple access (OFDMA) relaying in the presence of …

In this paper, the problems of relay selection and distributed beamforming are investigated
for bi-directional dual-hop amplify-and-forward frequency-division duplex cooperative …

Classical opportunistic relay selections always cause unequal power consumption among
all relays. For the battery-operated relays in the cooperative networks, uneven power …

Privacy and security have an increasingly important role in wireless networks. A secure
communication enables a legitimate destination to successfully retrieve information sent by …

The scarcity of radio resources coupled with the high data rate demands in the last few
years, induced incremental relaying techniques one of the most promising technologies …

Telecommunications networks are subject to continuous improvement and enhancement
processes. Every new iteration brings its set of challenges and limitations. In fact, the …