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Question I. [16 points] 1. A communication system uses the telephone network as its medium. If a sampling rate of 8000 samples per second is used to generate PCM signals, then, for SNR=30 dB, a. What is the number of uniform quantization levels required? Show work. b. What will be the data rate? Show work. 2. What is the channel capacity for a printer channel with a 3K Hz bandwidth and a signal-to-noise ratio of 5 dB? Show work. 3. A researcher wishes to digitally record analog sounds for testing animal hearing with frequencies of up to 100 kHz. a. What is the minimum sampling rate required to process these sounds? b. If a 16 bit (per sample) PCM (AJD) converter is used, what is the data rate of the resulting digital signal? c. Use Shannon's formula to find the minimum signal to noise ratio (in dB) required to sustain the given data rate over a 500 KHz radio channel. 4. Briefly explain the three processes of the Pulse Code Modulation technique. (You may draw figures) Question II. [10 points a) Explain with a drawing: 1-The Frequency Hopping Spread Spectrum (FHSS) technique. 2-Chunk Interleaving FEC scheme. b) System A System B N2 NI LI L2 (Not known by A) 0 Fig. 1. ARP operation