ENC 251 - Digital Communications (ch4: Channel Coding - partl) Q1. What is the function of Channel Encoding Sub-System in a digital communication system? Q2. Using the parity bit technique, 1. Evaluate the transmitted message T for each of the following given message (m). Message (m) Transmitted message (T); using parity bit technique 10110 100010111 0101101 101 b. Find if an error is detected or not in each of the following message. Received message (T) Error in the received message ? (Error / No error 10000 01010101 10100011010 10111 Q3. Using CRC technique for error detection, and given a message M=100100, with P-1101. answer the following: a. Evaluate Frame check sequence (FCS) ? and Transmitted frame T? b. If the received message is same as the transmitted message, show how the receiver can detect this? c. If an error is occurred in the received message at position 5 (ie the message received is T - 100110001 ) show how the receiver can detect the error ? 04. Assume the receiver received the message T-1100010101, with P-11001: how the receiver can check if there is any error in the data, using CRC technique ? show details