What is modulation in broadcasting?
Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform — constant height, or amplitude, and frequency.
Which modulation is used in radio broadcasting?
FM broadcasting is a method of radio broadcasting using frequency modulation (FM). Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to provide high fidelity sound over broadcast radio.
What is the necessity of modulation?
The most vital need of modulation is to enhance the strength of the signal without affecting the parameters of the carrier signal.
Why is modulation important in the communication system?
The process of modulation plays a major role in the fast transmission of signals. Below, we have mentioned a few of its importance in the communication system: When the transmission occurs over free space, the antennae radiate the signal out and the receiver receives it.
What kind of modulation is used in FM radio?
For example, AM is used in shortwave and radio wave broadcasting; FM is mostly used in high-frequency radio broadcasting, and pulse modulation is known for digital signal modulation.
What happens to the carrier wave during modulation?
During the process of modulation, any one of the three parameters viz Vc; and of the carrier wave is varied in accordance with information or message signal, which is the modulation base band audio frequency signal m (t). This would result in three types of modulation.
What kind of signal can be transmitted without modulation?
Modulation converts a wideband signal into a narrow-band signal whose ratio between highest frequency to lowest frequency is approximately one and single antenna will be sufficient to transmit the signal. Baseband signal: is a signal which transmits without using modulation.