Analog & Digital Communication

Definition: Superheterodyne receiver works on the principle of heterodyning which simply means mixing. It is a type of receiver which mixes the received signal frequency with the frequency of the signal generated by a local oscillator. The output of mixer provides a lower fixed frequency also known as intermediate frequency. These receivers are called Superheterodyne receivers as the frequency of the signal generated by the local oscillator is more than the frequency of the received … [Read more...] about Superheterodyne Receiver

Definition: Modulation, the process in which the carrier signal is varied according to the information bearing signal also called the modulating signal. During modulation, some characteristics it can be amplitude, frequency, or phase is varied in accordance with the original information-bearing signal that has to be transmitted. The receiver at the destination end won’t be able to understand that particular modulated signal so it uses demodulator section and demodulates that signal so as … [Read more...] about Modulation

Definition: Communication system basically helps in transmitting the data from an end to the other through a proper medium or channel. Based on the direction of transmission and reception the system is classified into two domains. The classification is such that: Unidirectional system or simplex system Bidirectional system or duplex system Half duplex system Full duplex system Simplex System This system allows one-way communication as it is only capable of … [Read more...] about Communication System