Elements of communication system
1 like838 views
The document outlines the essential elements of a communication system, highlighting its function as a process for transferring information efficiently, reliably, and securely. It details the key components, including input transducers, transmitters, channels, receivers, and output transducers, along with their roles in the communication process. The transmission medium is categorized into line (conducted media) and free space (radiated media), emphasizing the potential for signal degradation from noise and interference.
Elements of communication system
- 1. Communications Communication system Elements of Communication system AL-AMIN Department of Electrical & Electronic Engineering Jatiya Kab Kazi Nazrul Islam University, Trishal, Mymensingh, Banglade
- 2. Communications: Transfer of information from one place to another. Should be efficient, reliable and secured. “A communication system is a process of conveying information from a source to a destination” Communication system: “An electronic communication system is transferring information using an electrical field as a mean of signal” Communications
- 4. 1.Input Transducer :To convert the message to a form suitable for the particular type of communication system. Eg: Speech waves are converted to voltage variation by a microphone. 2.Transmitter :Processes the input signal , to produce a transmitted signal that suited the characteristic of transmission channel. Eg: modulation, coding Other functions performed: Amplification, filtering 3.Channel (Transmission medium): A medium that bridges the distance from source to destination. Eg: Atmosphere (free space), coaxial cable, fiber optic, waveguide Signal undergoes degradation from noise, interference and distortion.
- 5. The two main categories of channel commonly used are: 1. Line (conducted media) : The channel is made up metallic cable (such as coaxial cable, twisted pair, parallel wires, and others) or fiber optic cable. 1. Free space or radiated media : This is the medium where the transmission of signal is carried out by the propagation of electromagnet wave. The main applications are in radio broadcasting, microwaves and satellites transmission systems
- 6. 4.Receiver: To extract the desired signal from the output channel and to convert it to a form suitable for the output transducer. Eg: Demodulation, decoding Other functions performed: Amplification, filtering. 5.Output Transducer: Converts the electrical signal at its input into a form desired by the system used. Eg: Loudspeaker, PC and tape-recorders.