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 2ASK for modulation? What if you use 8ASK? (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? AA x x x x3A 3A 11 10 00 01 x x x x 10 00 01 11 A A (a) 4ary PAM (b) 4QAM...
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 Spring '07
 wang
 Parity bit, communication networks, digital transmission, Yao Wang

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