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Ebook Free Download | Grid Enabled Remote Instrumentation (Signals and Communication Technology) | This book focuses on a number of aspects related to the effective exploitation of remote instrumentation on the grid.  These include middleware architecture, high speed networking in support of grid applications, wireless grid for acquisition devices and sensor networks, quality of service provisioning for real time control, and measurement instrumentation. continue reading…

Ebook Free Download | Antenna Zoning: Broadcast, Cellular & Mobile Radio, Wireless Internet- Laws, Permits & Leases | There is a tower across town, or on the next block, or down the street. Perhaps it went up many years ago. It may not even have needed a permit. There are several facts you may not have considered perhaps legal facts, perhaps physical facts and demographic facts, perhaps ugly, but nonetheless real, facts. continue reading…

Ebook Free Download | Signaling in Telecommunication Networks | This book provides accessible, balanced coverage of subscriber signaling, interexchange signaling, signaling between mobile stations and a mobile network, and signaling between exchanges and other network entities. There are two types of communication network: circuit-switched networks and packed-switched networks, a dedicated physical circuit between the calling and called party is set up at the start of acall, and released when the call has ended. Telephone networks are circuit-swtched networks. Today, these networks are used for speech and other purposes, such as facsimile and are usually referred to as telecommunication networks. continue reading…

Ebook Free Download | WiMAX’s technology for LOS and NLOS environments | The radio channel of a wireless communication system is often described as being either LOS or NLOS. In a LOS link, a signal travels over a direct and unobstructed path from the transmitter to the receiver. A LOS link requires that most of the first Fresnel zone is free of any obstruction, if this criteria is not met then there is a significant reduction in signal strength. The Fresnel clearance required depends on the operating frequency and the distance between the transmitter and receiver locations.
In a NLOS link, a signal reaches the receiver through reflections, scattering, and diffractions. The signals arriving at the receiver consists of components from the direct path, multiple reflected paths, scattered energy, and diffracted propagation paths. These signals have different delay spreads, attenuation, polarizations, and stability relative to the direct path. continue reading…

Ebook Free Download | WiMAX | The past few months have seen a storm of debate about the economics and return on investment of Wi-Fi hotspots. What almost all the arguments entirely ignore is the standard lurking on the horizon, which will turn current assumptions on their head. This is the 802.16x wireless metropolitan area network (WMAN) specification, which is being developed and promoted by the WiMAX industry group, whose most powerful members are Intel and Nokia. As with Wi-Fi, the WiMAX label has now become widely acceptable as a name for the standard itself. continue reading…