What is frequency modulation explain in detail?

What is frequency modulation explain in detail?

Frequency modulation is a technique or a process of encoding information on a particular signal (analogue or digital) by varying the carrier wave frequency in accordance with the frequency of the modulating signal.

How do you create a frequency modulation?

To generate a frequency modulated signal, the frequency of the radio carrier is changed in line with the amplitude of the incoming audio signal. When the audio signal is modulated onto the radio frequency carrier, the new radio frequency signal moves up and down in frequency.

What is frequency modulation PPT?

Frequency modulation is a technique of modulation in which the frequency of carrier is varied in accordance with the amplitude of modulating signal. • In FM, amplitude and phase remains constant. • Thus, the information is conveyed via. frequency changes.

What is the frequency of the carrier in the frequency modulation experiment?

The carrier is a sinusoid with 1 Vpp amplitude and 1 MHz. Modulating signal is a sinusoid with a 10 Vpp and 10 kHz.

Which function is used for frequency modulation?

For the case of a carrier modulated by a single sine wave, the resulting frequency spectrum can be calculated using Bessel functions of the first kind, as a function of the sideband number and the modulation index.

What are the advantages of frequency modulation?

The main advantages of FM over AM are:

• Improved signal to noise ratio (about 25dB) w.r.t. to man made interference.
• Smaller geographical interference between neighboring stations.
• Less radiated power.
• Well defined service areas for given transmitter power.

What are the characteristics of frequency modulation?

Frequency Modulation index is consistently over 1, requires high bandwidth in the range of 200 kHz, operates in a very high frequency range of 88 to 108 Megahertz, has a complex circuit with an infinite number of side bands, and receives a high quality signal with high sound quality.

What are the benefits of modulation?

Advantages of Modulation

• Antenna size gets reduced.
• No signal mixing occurs.
• Communication range increases.
• Multiplexing of signals occur.
• Adjustments in the bandwidth is allowed.
• Reception quality improves.

What is the importance of modulation?

Modulation allows us to send a signal over a bandpass frequency range. If every signal gets its own frequency range, then we can transmit multiple signals simultaneously over a single channel, all using different frequency ranges. Another reason to modulate a signal is to allow the use of a smaller antenna.

What are the key elements in frequency modulation?

Frequency Modulation in Communication Systems In analog modulation, a continuously varying sine carrier wave modulates the data signal. The three defining properties of a carrier wave — frequency, amplitude, and phase — are used to create AM, PM, and Phase Modulation.

What common communication method uses frequency modulation?

FM radio broadcasting
Frequency modulation is widely used for FM radio broadcasting. It is also used in telemetry, radar, seismic prospecting, and monitoring newborns for seizures via EEG, two-way radio systems, sound synthesis, magnetic tape-recording systems and some video-transmission systems.

Which technique uses modulation?

Modulation techniques are roughly divided into four types: Analog modulation, Digital modulation, Pulse modulation , and Spread spectrum method. Analog modulation is typically used for AM, FM radio, and short-wave broadcasting. Digital modulation involves transmission of binary signals (0 and 1).

What is the advantage of frequency modulation?

The main advantages of FM over AM are: Improved signal to noise ratio (about 25dB) w.r.t. to man made interference. Smaller geographical interference between neighboring stations. Less radiated power.

What is the purpose of modulation?

The primary purpose of modulation in a communication system is to generate a modulated signal suited to the characteristics of a transmission channel. In radio communications, modulation is needed in the transmission systems to transfer the message into the available high frequency radio channel.

Why do we need modulation in communication?

Modulation and its types prevent the interference of the message signal from other signals. It is because a person sending a message signal through the phone cannot tell such signals apart. As a result, they will interfere with each other.

How is modulation achieved?

This is achieved by altering the characteristics of a wave. By superimposing a message on to a high frequency signal known as a carrier wave (or sinusoidal signal), video, voice and other data can be transmitted.