Cars are becoming increasingly autonomous. One necessary accessory is a collision avoidance radar. Such a radar emits a high-frequency modulated pulse traveling at the speed of light (3 \(\times 10^{8} \mathrm{~m} / \mathrm{s}\) ). The pulse strikes an object and returns to the radar receiver in the car. Based on the speed of the car and how fast the object is approaching the car, electronics will control the car's speed and, if necessary, its brakes. Figure P \(5=5 \underline{0}\) shows two consecutive pulses emitted by the radar.

(a) Write an approximate expression for the waveform from o to \(2.5 \times 10^{-5} \mathrm{~s}\).
(b) What is the furthest away the radar can sense an object?
(c) Use MATLAB to recreate the signal.

Transcribed Image Text:

Voltage (V) 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 0.5 Time (s) 1.5 2 2.5 x 10-5