Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization levels and the bit duration. [8 Marks] (i) Evaluate the bandwidth and the dynamic range of the PCM system. [10 Marks] (iii) Calculate the system total data rate. [7 Marks] (iv) Calculate the bandwidth efficiency. [5 Marks) (v) Provide your suggestions on how to improve the system efficiency. [10 Marks] Answer: