Secret sharing over the fast-fading MIMO wiretap channel is considered. A source and a destination try to share secret information over a fast-fading MIMO channel in the presence of a wiretapper who also makes channel observations that are different from but correlated to those made by the destination. An interactive authenticated unrestricted public channel is also available for use by the sou...

In this chapter, we consider space-time coding strategies for multiple-relay cooperative systems that effectively harness available spatial diversity. More specifically, the goal is to examine ways to efficiently forward signals from multiple relays to the destination while addressing the important practical issue of synchronization among the relays. We assume a general two-phase transmission p...

Participatory environments are a set of users that are within each other’s vicinity willing to share the device to perform a common task. The goal of this paper to make use of this environment to transmit data from source to destination. But there is no connected path between the two. The nodes that serve as the link between source and destination are chosen dynamically, based on some predeterm...

We propose FResher Encounter SearcH (FRESH), a simple algorithm for efficient route discovery in mobile ad hoc networks. Nodes keep a record of their most recent encounter times with all other nodes. Instead of searching for the destination, the source node searches for any intermediate node that encountered the destination more recently than did the source node itself. The intermediate node th...

Exchange rate pass-through to the price of traded goods is one of the important issues in economy of developing countries such as Iran and affects the efficiency of the exchange rate policies to improve the trade balance. The main aim of this paper is to empirically analyze exchange rate pass-through to Iran's saffron export price using panel data for twenty destination markets during 2000–2011...

We evaluate the economic consequences of endogenous immigration in a two-country, two-skill, endogenous-growth model, where human and physical capital are productive assets. Adding to model yields new insights about induced-immigration effects exogenous pull push triggers, on evolution “immigration surplus” short versus long run, destination source countries, global economy. The policy we analy...

Multipath routing allows the establishment of multiple paths between a pair of source and destination node in mobile ad hoc network. It is typically proposed in order to increase the reliability of data transmission or to provide load balancing and has received more and more attentions. In this paper, we present a multipath source routing protocol with some QoS guarantee. During the routing dis...

This paper considers relay selection and power allocation in a two-hop multi-source multi-destination mesh network wherein fixed relay nodes use the decode-and-forward protocol. The jointly optimal solution is of exponential complexity. Introducing a set of time-sharing factors into the objective function, and relaxing the selection constraint, provides an upper bound to the original problem. W...