Recent content by singedang2

i was able to solve this problem. the key was to take log of the function. then it becomes logv(t) + log(g(t)) then we do the usual fft then do the filtering, then do inverse fft to get back the original signal.

i've checked and it's multiplication, NOT CONVOLUTION. so v(t)g(t), instead of v(t)*g(t). sorry for the confusion.

i don't know about the non-linearity. this is for a course, and we've only learned fft and some Fourier analysis. the questions is we're suppose to receive am radio singal, but due to atmospheric/weather condition, loudness of the signal changes. so the original signal we wanted to receive...

sorry for the confusion. it's a multiplication. by 'add' i meant the two signals got mixed altogether.

i'm not actually given a function h(t). which I mean we're not doing an actual experiment, where I get h(t) and to try to recover v(t). i'm learning fft and Fourier analysis in school, and this is just one of the questions that is application of fft. problem is, my idea of doing fft to h(t)...

Homework Statement hello! i'm given a signal h(t) = v(t)*g(t) where g(t) is a distortion/noise that got added and has a very low frequency compared to v(t) i need to devise a method to clean up g(t) The Attempt at a Solution i'm thinking of to do the fft on the signal h(t)...

hello! i'm given a signal h(t) = v(t)*g(t) where g(t) is a distortion/noise that got added and has a very low frequency compared to v(t) i need to devise a method to clean up g(t) i'm thinking of to do the fft on the signal h(t), and remove the lower frequencies and do the inverse...

any help?

then does it mean now |f(x)| \leq \frac{5 \pi}{4} ? how can i show this using that differential equation?

so you're saying i need to show that while it was accelerating for the first half, the magnitude was 4? and i don't clearly get what it means to travel unit distance in a unit amount of time. isn't unit normally mean 1?

so how am i supposed to show that? a/2 + (-a/2) = ??/

help pls. thanks!

oh right... f(1) = 1 i think this is the given value.

sorry, there was mistake in what was written in latex. it's fixed now.

differential equation! urgent! Homework Statement we have f'(x) = \frac{1}{x^2 + f(x)^2} and i need to show that |f(x)| \leq \frac{5 \pi}{4} when x \geq 1 Homework Equations The Attempt at a Solution i know this has something to do with arctan, (by the looks of f'(x), it looks...