Consider a modified NRZ code called enhanced-NRZ (E-NRZ). The E-NRZ encoding takes a polar NRZ data stream and separates it into 7-bit codewords. Then, it inverts bit positions 2,3,6,7 of each codeword. Then, it adds one odd parity bit to each codeword.
i. Sketch the E-NRZ transmission of 5 consecutive ”1”s followed by 9 consecutive “0”s
ii. Give two advantages of E-NRZ over NRZ-I
iii. Any disadvantages?