Question

In a duobinary transmission, sample values of the received pulses were read as follows: 1 0 − 2 0 0 0 2 0 − 2 0 0 2 2 0 − 2 0 2 2 0 −2

(a) Explain whether there is any error in detection and find out where the error bit is likely located.

Answer 1

Duobinary transmission is a method used to encode and transmit digital data. To determine if there is any error in detection, we need to compare the sample values with the expected values. By analyzing the pattern of the sample values, we can identify that the error bit is likely located at the 7th position.

Step-by-step explanation:

Duobinary transmission is a method used to encode and transmit digital data. In this method, the received pulses are sampled and the sample values are read. To determine if there is any error in detection, we need to compare the sample values with the expected values. If there is a discrepancy between the two, then there is an error in detection.

In this case, the sample values are: 1 0 − 2 0 0 0 2 0 − 2 0 0 2 2 0 − 2 0 2 2 0 −2. To find out where the error bit is likely located, we can compare the sample values with the expected values based on the duobinary encoding scheme. By analyzing the pattern of the sample values, we can identify that the error bit is likely located at the 7th position (counting from 1) where the value is 2 instead of 0.