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Delay Tolerant Networks (DTNs) are sparse mobile ad-hoc networks in which there is typically no complete path between the source and destination. To increase the reliability of message delivery, multi-copy routing is often used at the expense of high buffer and bandwidth overhead. While much work has been done in the design of forwarding algorithms, little work has focused on studying forwarding under...
This paper aims to analyze and evaluate the performance of fixed gain amplify-and-forward (AF) cooperative diversity multiple-input multiple-output (MIMO) relay systems over flat fading Rayleigh channels. Diversity is achieved through using orthogonal space-time block coding technique (OSTBC) at the transmitter. OSTBC is used to encode a BPSK modulated signal before being transmitted through the channel...
The concept of Device-to-Device (D2D) communication has been introduced for local area connectivity as a means to improve the cellular spectrum utilization and to reduce the energy consumption of user equipments. The performance of D2D communication is practically limited due to large distance and/or poor channel conditions between the D2D transmitter and receiver. To overcome these issues, a relay-assisted...
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