The two sets of plots shown below represent measurements of the same behavior. T
ID: 1716545 • Letter: T
Question
The two sets of plots shown below represent measurements of the same behavior. The data on the left was taken by you, and the data on the right was taken by a co-worker. The top plots show time domain data, and the bottom plots show the frequency spectrum. For each of the following possibilities, explain whether it is a reasonable explanation for some or all of the differences between your plots and your co-workers: Your co-worker collected data for a longer amount of time Your co-worker collected data for a longer amount of time Your co-worker used a lower sampling rate Your co-worker used an antialiasing filter before digitizing the data Your co-worker applied a digital filter to the dataExplanation / Answer
1)A worker takes period of time 0.05sec with frequency 10hz already starts the work but coworker takes the timeperiod of he ready for start the work becauese the wave has no peaks,so he takes long tme for collect data.
2)at 100hz frequency the wave is raised and sampling rate is also increased but in coworker the wave is intially slowdown and then raised so he the sampling is low.the wave is incontinuous straight lines it peaks are very short so the coworker takes lower samplingrate.
3)signal is measured has an upperlimit on its frequency,pickup from stray signal could contain frequencies higher than nyquistfrequency.thease frequencies may alias into the appropriate frquency range.results are erornous.so the frequency of iputsignal is limited,alowpasfilter is added before the sampler and ADC. this is called alliasingfilter.it is used for passes all apropriate input frequencies and cutoff all undesired frequencies.
4)digital filter are two types a)finite impulse response filter it is used for reject unnessary frequencies and for smoothing. b)infinte impulseresponse filter it is used for no output signal at inputsignal ia arriving so coworker is used the digital filter
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