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

    âš¡ Month End Offer - Flat 52% Off On All Courses! Enroll Now âš¡
    00:00:00 AM Left

    Question

    If 1011 is transmitted with alternate-mark-inversion

    bipolar encoding and the corresponding transmitted voltage levels are {+1,0,-1,+1}. If the received voltage levels due to noise are {+1,0,-1,-1} then how many bits are detected to be in error ?
    A 1 Correct Answer Incorrect Answer
    B 3 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 2 Correct Answer Incorrect Answer

    Solution

    In Alternate Mark Inversion (AMI) bipolar encoding, binary 1 is transmitted as alternating +V and –V, while binary 0 is transmitted as 0 V. For the input data 1011, the transmitted levels are {+1, 0, –1, +1}. The received sequence is {+1, 0, –1, –1}. Comparing symbol by symbol, the first three match correctly, but the last symbol differs. Therefore, only one bit is in error.

    Practice Next
    More IT Operating System Questions

    Relevant for Exams:

    ask-question