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Good signal reception in wireless communications depends on a reliable communication link. But as the signal travels through the communication link between the sender and the receiver, several factors affect the quality of the signal. One of these factors is the weather, especially in satellite communications with long link. Propagation measurements at frequencies above 10 GHz have been carried out...
The recent technological advances have entrenched the potential benefits, when large population of wireless sensor nodes deployed in agricultural, industrial and environmental areas to predict the behavioral analysis of physical attributes such as temperature or gas. This work mainly focuses on the three dimensional temperature distribution of a specified field based on virtually deployed sensor nodes...
Advances in information and communications technology have enabled the adoption of wireless communication techniques in all sectors for the transmission of information in all forms between any two points. Wireless communications and distributed computing have promoted the development of vehicle- monitoring systems to reduce the maintenance and inspection requirements of railway systems while maintaining...
Direct short range broadband communication access in vehicles promises to deliver high quality of service IP-based communications with networks deployed in moving vehicles. This paper provides an analysis of range extension and channel capacity increase in such networks when multi-hop communication is adopted for ultra wideband (UWB) communications. Received signal to noise ratio is used with multi-hopping...
Cross-layer scheduling has received an intense attention recently owing to the desire to exploit protocol interactions to design optimum systems that are adaptable to service requirements of network applications. This article discusses a Lyapunov stable power-constrained opportunistic scheduler that makes an optimum use of the wireless spectrum while guaranteeing a minimum service to all flows active...
We consider opportunistic communication in multiservice wireless data networks using centralized controllers. Opportunistic scheduling (OS) is an emerging cross-layer media access control design approach to multiuser communication over fading wireless channels. OS exploits channel variations to maximize wireless throughput. We present a general background of OS schemes and then propose an OS scheme...
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