(Solved): Pulse Code Modulation (PCM) is an extension of pulse modulation. Each analog sample value is quant ...

Pulse Code Modulation (PCM) is an extension of pulse modulation. Each analog sample value is quantized into a discrete value for representation as a digital code word. Based on the Figure 1 below, 3-bit encoded PCM system is applied use of sampling rate 2,000 samples/second. Output of \( \mathrm{PCM} \) then transmitted through line coding and binary modulation processes. Determine: (Please use Appendix 1 for calculation/conversion processes) (i) The sampling interval and step size or quantization interval. Give the reason (ii) The sampling time and amplitude for each sampled signal (iii) The quantization value and binary representation for each sampled signal (iv) Sketch the line coding using unipolar NRZ at bit rate is \( 20 \mathrm{kbps} \). (v) Sketch the binary modulation using DPSK at bit rate \( 20 \mathrm{kbps} \) and carrier signal \( 2 \sin (80,000 \pi) t \)