Basic Computer Science

Multiprocessor design Creating a multiprocessor from a number of uniprocessors (one CPU) requires physical links and a mechanism for communication among the processors so that they may operate in parallel.…

The operation of such a computer, once a program and some data have been loaded into RAM, is as follows. The first instruction is transferred from RAM into the control…

A digital computer (see also analog computer) typically consists of a control unit, an arithmetic-logic unit, a memory unit, and input/output units, as illustrated in the figure. The arithmetic-logic unit…

Computer science as an independent discipline dates to only about 1960, although the electronic digital computer that is the object of its study was invented some two decades earlier. The…

Introduction HILI subcommittee (IEEE802.1) of the IEEE identified the following possible internetworking scenarios. ·         A single LAN ·         Two LANs connected together (LAN-LAN) ·         A LAN connected to a WAN (LAN-WAN) ·         Two LANs…

One of the key design issues in satellite communication is how to efficiently allocate transponder channels. Uplink channel is shared by all the ground stations in the footprint of a…

VSAT stands for Very Small Aperture Terminal. It was developed to make access to the satellite more affordable and without any intermediate distribution hierarchy. Most VSAT systems operate in Ku…

Back in 1945, the famous science fiction writer Arthur C. Clarke suggested that a radio relay satellite in an equatorial orbit with a period of 24 h would remain stationary…

MEO satellites are positioned between two Van Allen Belts at a height of about 10,000 Km with a rotation period of 6 hours. One important example of the MEO satellites…

Introduction Microwave frequencies, which travel in straight lines, are commonly used for wideband communication. The curvature of the earth results in obstruction of the signal between two earth stations and…