📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    Which probability distribution is most widely used to

    model channel noise in pulse code modulation?
    A Uniform Correct Answer Incorrect Answer
    B Gaussian Correct Answer Incorrect Answer
    C Bernoulli Correct Answer Incorrect Answer
    D Poisson Correct Answer Incorrect Answer

    Solution

    In PCM systems, the channel noise mainly comes from thermal noise, which is the result of random motion of electrons in conductors and electronic devices. By the central limit theorem, the sum of many small random effects tends to follow a Gaussian (normal) distribution. That’s why Gaussian distribution is the most accurate and widely used model for channel noise in digital communication systems.

    Practice Next
    More IT Operating System Questions

    Relevant for Exams:

    ask-question