An analogue signal of frequency 5 MHz in Figure is applied to the input ors poise code modulation (PCM) system. The PCM system samples the signal at a rate 75% above the Nyquist rate and employs a uniform quantizer of the midrise type with L levels followed by an R-bit binary encoder

(a) Calculate the maximum permissible time interval between the sample values that will mum perfect signal reproduction.

(b) If the signal-to-quantization noise ratio is required to be at least 5 dB. compute the minimum value of L.

(c) Based on figure a single-error correcting linear Mock code with a code rate of 0.5 considered. Determine the number of binary digits required to encode each sample and the bit rate of the binary coded signal.

(d) Following figure the binary data is transmitted using 32-ary quadrature amplitude modulation (32-QAM). Calculate the minimum transmission bandwidth required to avoid intersymbol interference (ISI). Assume pulse shaping with roll-off factor, r= 0.5 is used.

Transcribed Image Text:

-T/2 Am 13 -Am 0 T/2 -T/2 Am 13 -Am 0 T/2

Answer rating: 100% (QA)

a f s 2 75f m 2 15f m 305 f m 305 x 5 MHz Time inter... View the full answer