Question

3. You wish to design a Doppler radar system. A sinusoidal generator continuously generates the signal, S(t)-Acos2nt. This signal is transmitted to a speeding car, and the reflected signal is of the form rft)-Bcos[2lfe+Af)t]. The situation is shown below. The frequency difference (Doppler shift) is Af-10s, where s is the speed of the car in miles per hour. You wish to display the speed of the car on a voltmeter that reads from zero to 100 volts, and you wish the voltage reading to be the same as the speed. That is, if the car is traveling at 50 miles per hour, you want the meter to read 50v. You have a laboratory full of equipment, including filters, multipliers, and any other type of device you need. Design the system. Car Reflection: B cos [2m (fe +Api] Gencrator: A cos 2mfl

Answer 1