Exercise 1

Assuming even parity, find the parity bit for each of the following data units.

a) 1001011

b) 0001100

Exercise 2

Assuming even parity. A sender sent the codeword 00000000. State whether the receiver would detect an error or not in case the following words are received. In case no error is detected extract data.

a) 10000001

b) 11100000

Exercise 3

Given the dataword 1010011110 and the divisor 10111,

a) Show the generation of the CRC and the codeword at the sender site (using binary division).

b) Show the checking of the codeword at the receiver site (assume no error).

c) Assume 11101111100011