Analog modulation deals with an analog signal. The code is binary number when sufficient quantizing levels are used the signal will resemble the same as is from an analog system. Analog and Digital Pulse Modulation Techniques Need? This is further developed as Delta Modulation (DM). The three types of Analog pulse modulation are as follows: Pulse Amplitude Modulation (PAM): It is the technique in which, pulse carrier signal amplitude varies in accordance with the instantaneous amplitude of the information signal. Analog Modulation. Pulse-amplitude modulation (PAM), is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses. Q10. Many Signals in Modern Communication Systems are digital Also, analog signals are transmitted digitally. b) Natural sampling. Amplitude Modulation. FM Modulators and Demodulators, Approximately Compatible SSB Systems. d) Both a and b . AND Gate Pulse Shaping Network FM Modulator Analog Signal PAM - FM Pulses at sampling frequency HF Carrier Oscillator PAM Pulse Amplitude Modulator Analog Signal Amplitude Modulated Pulses 4. Types of analog pulse modulation systems are. As the resultant is a coded pulse train, this is called as PCM. In digital modulation, the modulation technique used is Pulse Code Modulation (PCM) where the analog signal is converted into digital form of 1s and 0s. It is quantized, coded and then transmitted. It is an analog pulse modulation scheme in which the amplitudes of a train of carrier pulses are varied according to the sample value of the message signal. Quantizing is done to the nearest standard amplitude. In CW modulation schemes some parameter of modulated wave varies a) Pulse amplitude modulation. a) Instantaneous sampling. If amplitude of the pulse is made to the proportional to the message, then it is termed as pulse amplitude modulation (PAM). PAM , PWM , PPM , PCM and DM. FIGURE 3.21 Different types of pulse analog modulation methods. 3.13 PULSE AMPLITUDE MODULATION (PAM) Pulse amplitude modulation may be defined as that type of modulation in which the amplitudes of regularly spaced rectangular pulses vary according to instantaneous value of the modulating or message signal. Amplitude modulation (AM), frequency modulation (FM) and phase modulation (PM) are the types of continuous wave analog modulation systems whereas PAM, PWM and PPM are the pulse analog modulation systems. Reduced distortion and improvement in signal to noise ratios. c) Frequency modulation. 4. Pulse width modulation (PWM) Pulse code modulation (PCM) In this article, we will cover Analog modulation and its types. Analog pulse modulation schemes: Pulse amplitude modulation –Natural sampling, flat top sampling and Pulse amplitude modulation (PAM) & demodulation, Pulse-Time Modulation –Pulse Duration and Pulse Position modulations, and demodulation schemes, PPMspectral analysis, Illustrative Problems. In pulse width modulation or pulse duration modulation, the width of the pulse carrier is varied in accordance with the sample values of message … The sampling technique having the minimum noise interference is. PULSE MODULATION AND DIGITAL TRANSMISSION OF ANALOG SIGNAL: Analog to Digital( Noisy Channel and Role of Repeater), Pulse Amplitude Modulation and Concept of Time division multiplexing ,Pulse Width Modulation and Pulse Position Modulation, Digital Representation of Analog Signal. b) Pulse time modulation. c) Flat top sampling. In short in the pulse code modulation process: the signal is continuously sampled. The types of analog modulation are briefly discussed below. The pulse analog modulation technique are of three types namely, PAM, PWM, and PPM and pulse digital modulation technique are of two types namely DM, DPCM. Pulse Duration Modulation (PDM) or Pulse Width Modulation (PWM): It is a type of analog modulation. Ans.
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