when the bit rate increases bandwidth increases.
Regenerative Repeater is used for the PCM (Pulse code modulation ) it amplifies the signal because the effect of the channel over the signal .
It is a type of Pulse modulation as in PPM the position of pulse of carrier pulse train is varied in accordance with the modulating signal.
The difference between pulse code modulation and delta modulation is that pulse code modulation is a method of encoding audio information digitally while delta modulation is a method that converts analog to digital signal.
Explain with diagram the technique Pulse-width modulation?
In pulse modulation, the carrier signal is typically a continuous analog waveform, such as a sine wave or square wave, that serves as the basis for transmitting information. The modulation process involves varying certain properties of this carrier wave—such as its amplitude, width, or position—according to the information signal. This modulation allows the information to be encoded and transmitted efficiently over various communication channels. Common types of pulse modulation include Pulse Amplitude Modulation (PAM), Pulse Width Modulation (PWM), and Pulse Position Modulation (PPM).
8000 Hz
Actually there are four:widthamplitudepositioncodeOf these four pulse code modulation is digital while the other three are analog.
There is no difference.
Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of 2M possible time-shifts. This is repeated every T seconds, such that the transmitted bit rate is M/T bits per second. It is primarily useful for optical Amplitude_modulation_compared_to_Pulse_position_modulation'systems, where there tends to be little or no multipath interference.Read more: Amplitude_modulation_compared_to_Pulse_position_modulation'This answer is lifted from response to "Amplitude modulation compared to Pulse modulation", so the original answerer gets credit for a great answer.
pulse width modulation is nothing but changing on and off time period of a waveform without changing its frequency
Pulse width mod, pulse amplitude mod, pulse position mod, pulse code mod.
pulse code modulation method used a telephony.