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s06_ps08_spring04

# s06_ps08_spring04 - Unified Engineering II Spring 2004...

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Unformatted text preview: Unified Engineering II Spring 2004 Problem S6 (Signals and Systems) Note: This problem is similar to one given a couple years ago. Please try to do this one without looking at bibles — the solution is instructive. This problem shows, in a somewhat simplified way, how a radar system determines the distance to an aircraft. More basically, it will give you practice doing convolution using the “ﬂip and slide” method. The radar sends out a signal, u ( t ), that reﬂects off the aircraft and returns to the radar system. The time it takes the signal to return is twice the distance to the aircraft, divided by the speed of light. The received signal is u ( t − T ), where T is the round trip travel time of the signal. It may not seem obvious, but it’s not easy to determine T by measuring the returned signal. In principal, one could simply display the returned signal on an oscilloscope and measure the time of some key feature of the signal, such as the leading edge of the signal, or the peak of the signal, or whatever. the signal, or the peak of the signal, or whatever....
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s06_ps08_spring04 - Unified Engineering II Spring 2004...

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