Introduction :-
Modulation is the process of changing one or more properties like amplitude, frequency, phase of high frequency carrier wave in accordance with the Modulating wave. Here the Modulating wave is base-band signal. Example of base-band signal is speech or music signal.
what is amplitude modulation : Amplitude Modulation is the process of changing Amplitude of high frequency carrier wave in accordance with the Amplitude of Modulating wave.
Definition of Side-Band:
A group of frequencies which is having frequency fc±fm is called as Side-Band. Here fc=Carrier frequency and fm=modulating frequency. fc+fm is called as upper side-band and fc-fm is called as lower side-band.
Different types of Amplitude Modulation
Depending on side-bands we have 5 different types of Amplitude Modulation.
1. Double-Sideband Full Carrier
2. Single-Sideband Full Carrier
3. Single-Sideband Reduced Carrier
4. Vestigial-Sideband
1. Double-Sideband Full Carrier:
The technique of amplitude modulation in which along with the carrier if both upper side-band and lower side-band is transmitted then that amplitude modulation is called as Double-Sideband full carrier.
In order to increase the efficiency of transmitter we may suppress the carrier from this DSB-AM then that technique is called as Double-Sideband Suppressed carrier Amplitude Modulation Method.
This type of amplitude Modulation is also called as conventional amplitude modulation
2. Single-Sideband Full carrier:
The technique of amplitude modulation in which single side-band is transmitted is called as single-sideband Full carrier and is denoted as SSB.
This type of modulation technique is used in shortwave radio or shortwave broadcasting
3. Single-Sideband Reduced Carrier:
The technique of amplitude modulation in which carrier and single side band is suppressed then that type of amplitude modulation is called as single-sideband Reduced carrier.
This type of modulation technique is used in amateur radio.
4. Vestigial-Sideband:
The technique of amplitude modulation in which part of single side band and all other remain as it is ,then that type of amplitude modulation in called as vestigial side-band.
This type of modulating technique is used in transmission of Television i.e., Television broadcasting.
Modulation is the process of changing one or more properties like amplitude, frequency, phase of high frequency carrier wave in accordance with the Modulating wave. Here the Modulating wave is base-band signal. Example of base-band signal is speech or music signal.
what is amplitude modulation : Amplitude Modulation is the process of changing Amplitude of high frequency carrier wave in accordance with the Amplitude of Modulating wave.
Definition of Side-Band:
A group of frequencies which is having frequency fc±fm is called as Side-Band. Here fc=Carrier frequency and fm=modulating frequency. fc+fm is called as upper side-band and fc-fm is called as lower side-band.
Different types of Amplitude Modulation
Depending on side-bands we have 5 different types of Amplitude Modulation.
1. Double-Sideband Full Carrier
2. Single-Sideband Full Carrier
3. Single-Sideband Reduced Carrier
4. Vestigial-Sideband
1. Double-Sideband Full Carrier:
The technique of amplitude modulation in which along with the carrier if both upper side-band and lower side-band is transmitted then that amplitude modulation is called as Double-Sideband full carrier.
In order to increase the efficiency of transmitter we may suppress the carrier from this DSB-AM then that technique is called as Double-Sideband Suppressed carrier Amplitude Modulation Method.
This type of amplitude Modulation is also called as conventional amplitude modulation
2. Single-Sideband Full carrier:
The technique of amplitude modulation in which single side-band is transmitted is called as single-sideband Full carrier and is denoted as SSB.
This type of modulation technique is used in shortwave radio or shortwave broadcasting
3. Single-Sideband Reduced Carrier:
The technique of amplitude modulation in which carrier and single side band is suppressed then that type of amplitude modulation is called as single-sideband Reduced carrier.
This type of modulation technique is used in amateur radio.
4. Vestigial-Sideband:
The technique of amplitude modulation in which part of single side band and all other remain as it is ,then that type of amplitude modulation in called as vestigial side-band.
This type of modulating technique is used in transmission of Television i.e., Television broadcasting.
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