Introduction:
Modulation is defined as the process of varying some characteristic of a periodic wave with an external signal. Pulse modulation systems may incur significant bandwidth (b) penalty compared to the transmission of a signal in its analog form.
The aim (goal) of pulse modulation methods is to transfer a narrowband analog signal, for example in every day we can use a phone call over a wideband base band channel. I like to share this Equation for Torque with you all through my article.
Pulse modulation methods
Most pulse systems (pulse modulation) are based on sampling of the information signal amplitude at periodic intervals, usually about twice the maximum frequency present, or about 8000 times per second for voice transmission.
In pulse modulation, several advantages and disadvantages are as follow:
Advantages:
Noise immunity
Inexpensive digital circuitry
Can be time-division multiplexed with other pulse modulated signals.
Transmission distance is increased through the use of regenerative repeaters
Digital pulse streams can be stored.
Error detection and correction is easily implemented
Disadvanges:
Require a much greater bandwidth to transmit and receive than its analog counterpart.
Special encoding and decoding techniques may be necessary to increase transmission rates making the pulse stream more difficult to recover.
May require precise synchronization of clocks between the transmitting and the receiving stations.
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Advantages and Disadvantages
Most pulse systems (pulse modulation) are based on sampling of the information signal amplitude at periodic intervals, usually about twice the maximum frequency present, or about 8000 times per second for voice transmission.
In pulse modulation, several advantages and disadvantages are as follow:
Advantages:
Noise immunity
Inexpensive digital circuitry
Can be time-division multiplexed with other pulse modulated signals.
Transmission distance is increased through the use of regenerative repeaters
Digital pulse streams can be stored.
Error detection and correction is easily implemented
Disadvanges:
Require a much greater bandwidth to transmit and receive than its analog counterpart.
Special encoding and decoding techniques may be necessary to increase transmission rates making the pulse stream more difficult to recover.
May require precise synchronization of clocks between the transmitting and the receiving stations.
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