Electronic and Communication - Engineering

Abstract : One of the most useful microwave ferrite components is the isolator, which is a two-port device having unidirectional transmission characteristics. A common application uses an isolator between a high-power source and a load to prevent possible reflections from damaging the source. The most popular type of microwave isolator is the resonance isolator. A single tone resonance isolator with resonance frequency of 10 GHz, and a broad band resonance isolator have been designed and optimized.

Abstract : Speech Communications were a major research area in signal processing domain since the first third of the last century. As digital telephony and digital communications are evolving and advancing in efficiency and services speech coding techniques were following it to match or to make use of the new features and conditions.

Abstract : The objective of this work is to design and implement the software and hardware of the distributed control system for digital exchange. The proposed distributed control system for digital exchange model consists of three layers which are master, slave and sub-slave layer. The practical model designed and implemented, consists of master and slave layer only. The Master-Layer of the practical model include personal computer (PC[A]) and Switching-Circuit (SC[A]). PC[A] is connected with the SC[A] through the parallel port.