What is pulse code modulation and demodulation?

What is pulse code modulation and demodulation?

What is Pulse Code Modulation and Demodulation? Pulse code modulation is a method that is used to convert an analog signal into a digital signal so that a modified analog signal can be transmitted through the digital communication network.

What do you understand by PCM waveforms?

Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps.

What are the steps followed to achieve pulse code modulation?

Here are the three steps for developing an equivalent PCM digital signal from an analog signal. The typical human speech is represented by a simple 1200 Hz tone, which is represented by a sine wave….>> Basis of Pulse Code Modulation (PCM)

TS Type of Information
17-31 Speech

What are the applications of pulse code modulation?

Applications of Pulse Code Modulation

  • It is used in telephony and compact discs.
  • Pulse Code Modulation is used in satellite transmission systems and space communications.

What is the main advantage of Pulse Code Modulation?

Benefits or advantages of PCM ➨It is robust against noise and interference. ➨Uniform transmission quality. ➨Efficient SNR and bandwidth trade off. ➨It provides secure data transmission.

Why is PCM more immune to noise?

PCM allows repeated noise-free regeneration of the original digital signal, which implies that a digital signal can be sent over large distances without deterioration.

What is better FM or AM?

FM has better sound quality due to higher bandwidth. Twice the highest modulating frequency. In AM radio broadcasting, the modulating signal has bandwidth of 15kHz, and hence the bandwidth of an amplitude-modulated signal is 30kHz. Twice the sum of the modulating signal frequency and the frequency deviation.

How is the output of a pulse code modulated?

Of them all, the digital modulation technique used is Pulse Code Modulation (PCM). A signal is pulse code modulated to convert its analog information into a binary sequence, i.e., 1s and 0s. The output of a PCM will resemble a binary sequence.

What is the difference between demodulation and modulation?

In this method data rate is half of the conventional PCM. Pulse Code Demodulation will be doing the same modulation process in reverse. Demodulation starts with decoding process, during transmission the PCM signal will effected by the noise interference.

What are the advantages of differential pulse code modulation?

The advantages of differential pulse code modulation include the following. The requirement of bandwidth is low as compared to pulse code modulation. As compared to PCM, the number of bits that are used to represent one sample value can also be reduced The disadvantages of differential pulse code modulation include the following.

How is amplitude modulation and demodulation verified in hardware kit?

Amplitude Modulation and Demodulation are verified in the hardware kit and its waveforms are analyzed for different modulation index. EXP. NO:3 GENERATION AND DETECTION OF FREQUENCY