Problem:
An analog sensor is employed to monitor the temperature of sea water at different depth. The sensor is fitted to a buoy and incorporates a wireless transmitter which sends a signal to a base station found on the mainland through a communication satellite as shown in Fig. The effective range of the sensor is between 1 to 32 degrees Celsius with operating bandwidth of 50 Hz. The transmitter converts the analogue sensor signal in a digital data stream using a PCM codec. The digital data stream is shift-keyed and then transmitted as a 16-FSK microwave signal with carrier frequency at 1 GHz and frequency separation Δfc of 10 MHz.
Required:
problem1. Compute the minimum sampling rate required to fully characterize the analog sensor signal?
problem2. Compute the number of quantization levels configured in PCM codec if we wish to detect 2 degrees Celsius changes in temperature.
problem3. Compute the bit rate in bps and quantization error in dB of this PCM codec?
problem4. Compute the maximum signalling rate and data rate achievable using 16-FSK?
problem5. Compute the bandwidth accessible for the microwave uplink?
problem6. Compute the maximum allowable SNRdB of the uplink if the data rate has to be a minimum of 350 Mbps?