Unformatted text preview: what cases cannot be detected? 3. Consider repetition coding with a redundancy factor of 3, i.e., to send an information bit “0”, we send “000”; to send an information bit “1”, we send “111”. Suppose the probability that any one bit gets inverted during transmission is p=0.1, what is the probability that an information bit is decoded wrong? 4. Consider a channel with bandwidth 1MHz. (a) Suppose the channel is noiseless, what is the maximum number of bits that can be transmitted reliably if you use 2-ASK for modulation? What if you use 8-ASK? (b) Suppose the channel suffers from noise with a signal to noise ratio of 10 dB. What is the maximum number of bits that can be transmitted reliably? What if the channel SNR is 30 dB? A-A x x x x-3A 3A 11 10 00 01 x x x x 10 00 01 11 A A (a) 4-ary PAM (b) 4-QAM...
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- Spring '07
- Parity bit, communication networks, digital transmission, Yao Wang