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# 8.5-8 We need to design a binary PCM system to transmit an analog TV signa; m(t) of bandwidth 4.5 MHz. The receiver output ratio of signa; to quantization noise ratio is required to be at least 50 db. (a) The TV signal m(t) value is uniformly distributed in the range (-mp, mp). Fimd the minimum number of quantization levels L required. Select the nearest value of L to satisfy. (b) For the value of L in part (a), compute the receiver output SNR assuming the nonthreshold region of operation. (c) For the value of L in part (a), compute the required channel bandwidth for the PCM transmission. (d) If the output SNR is required to be increased by 6 dB (four times), what are the values of L and the percentage increase in transmission bandwidth?

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