Physics, 21.08.2019 04:20, fordkt9027
Detecting a signal without aliasing suppose you are detecting a signal from a distant pulsar. the signal is, to good approximation, an inļ¬nite series of pulses arriving with a period of 5.8ms. each pulse can be approximated as a gaussian with a 1/e width of 1ms. a) write down a function for this pulse train (using a convolution). (4) b) what is the fourier transform of the pulse train? (5) c) assuming you want to sample the incoming signal. what is the minimum sampling rate (in hz) you must have in your electronics to avoid aliasing of the pulsar signal? . (a good choice of threshold might be to ļ¬nd the frequency such that the energy has dropped to 1 part per million of the peak energy, but you can choose as long as you explain your reasoning and calculations) (5) d) suppose you discover, to your dismay, that a rival astronomer is trying to damage your data by injecting a high frequency signal into your data that obscures your signal. what frequencies could they use to do this? (5) e) to foil the evil plan you use a low pass ļ¬lter into your data acquisition system to cut out the interference signal. where do you put this ļ¬lter (before or after sampling)? can you beat your rival or are there some frequencies that you canāt ļ¬lter? explain your reasoning.
Answers: 2
Physics, 23.06.2019 03:50, jordan2875
Which stable element is used to determine the age of volcanic rock? a- argon b- carbon-14 c- potassium d- carbon-12
Answers: 2
Detecting a signal without aliasing suppose you are detecting a signal from a distant pulsar. the si...
English, 08.10.2019 08:50
History, 08.10.2019 08:50
History, 08.10.2019 08:50
English, 08.10.2019 08:50
History, 08.10.2019 08:50