what is pulse modulation

In amplitude modulation and frequency modulation, the modulation was done by sinusoidal signals. In pulse modulation, short pulses may do the modulation of a radio-frequency carrier. The simplest of these is the conventional tele..

In amplitude modulation and frequency modulation, the modulation was done by sinusoidal signals. In pulse modulation, short pulses may do the modulation of a radio-frequency carrier. The simplest of these is the conventiona..

The modulating signal is sampled at the basic rate, usually where f m is the maximum value. The amplitude of the modulation determines the amplitude of the transmitted pulse. The band-width will be great for exact pulse waveform, but may be reduced by a l..

It translates the sampled amplitude data into a code. The code is transmitted as a succession of pulses and spaces. The system enjoys greater freedom from noise and interfering signals than is possible with most other pulse systems. This freedom arises from the fact that it is ..

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Modulation - In earlier times, the most widely used form of communication was a system based on the transmission of a continuous-wave (CW) signal. With this system, the signal was interrupted periodically (Morse code) to produce a coded message. The CW systems required tremendous training..

In earlier times, the most widely used form of communication was a system based on the transmission of a continuous-wave (CW) signal. With this system, the signal was interrupted periodically (Morse code) to produce a coded messag..

Let us consider the case of electromagnetic radiation in an ionised medium. Suppose we increase/decrease the amplitude of an electromagnetic wave passing through an ionised gas. These modulations of the electromagnetic wave could contain coded information (Morse code for example). One wo..

In frequency modulation, the frequency of the carrier wave is modified in accordance with the amplitude of the modulating wav..

The ratio of change of amplitude of carrier wave to the amplitude of normal carrier wave is called the modulation factor ..