Digital Cellular System and Multiple Access Scheme : Cellular Fundamentals: The area served by mobile phone systems is divided into small areas known as the cell . Each cell contains the base station that communicates with mobiles in the cell by transmitting
OPTICAL TECHNOLOGIES-WDM Wavelength division multiplexing:- –The technology of combining a number of wavelengths onto the same fiber is known as wavelength division multiplexing or WDM. – Wavelength division multiplexing is similar to frequency
Television transmission and reception: The plan of television system is to expand sense of sight beyond its natural limits and to transmit sound associated with scene. Picture signal is generated by Television camera and the sound signal by microphone. In
1. CHOPPER 1.1 DEFINITION OF CHOPPER A chopper is a device that is static in nature and which is used to obtain a dc voltage(variable) from a dc voltage (constant) source. A chopper is otherwise also known as dc to dc converter. They can be used in cars,
In this topic we give a high-level description of the wireless communications system and the technical challenges faced in network. Most notably, they are as follows: multipath propagation spectrum limitations; energy limitations; user mobility; noise limited
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