Question

a) Suppose that data are transmitted in blocks of sizes 100 bits. Discribe the maximum
error rate under which error detection and retransmission mechanism (1 parity bit per
block) is better than using Hamming code. Assume that bit errors are independent of
one another and no bit error occurs during retransmission. We have a sampled lowpass signal with
20KHz and 50 KHz as lower and higher frequencies respectively. Using 1024 levels of quantization.
extract the PCM bandwidth of this signal.
b) Recognize the minimum overhead to send an Internet Protocol (IP) packet using point to point
protocol (PPP). Count only the overhead introduced by PPP itself, not the IP header overhead
Compare the maximum overhead with and without introducting the PPP​

Answer 1

Answer:

To provide more reliability than a single parity bit can give, an ... What is the Hamming distance of this code? ... can only detect ALL single error for sure, that is, d =1