Recent content by MikeSv

Hi and thanks again. Sorry that my previous post was a Little bit confusing. Iam using the xcorr() function and from what I understand, xcorr gives me the lags (for both plus and minus) rx(0,0), rx(0,1), rx(0,2)...,rx(0,N) When I compute the autocorrelation Matrix with these values I'll get a...

Hi and thanks for the quick reply! I think Iam just confused about the notation. When I look at the Matrix forms of rx(k, l) and rx(k) my book says: Rx(k,l) = Rx(0,0) Rx(0,1)... Rx(0,p) Rx(1,0) Rx(1,1)... Rx(1,p) ... Rx(p,0) Rx(p,1)... Rx(p,p) If x...

Hello everyone. Iam a little bit confused about the autocorrelation and using Matlab so I hope someone can help me out. As far as understand Matlab computes the sampled autocorrelation where the lag between the samples is given by x(n)* x(n-l). Buy what if the autocorrelation depends on the...

Thank you very much for your reply! So the maximum frequency Iam able to see in my DTFT is 1/2 of my sampling frequency? That means I have to multiply my angular frequency by 1/2 the sampling frequency to get the frequency values in Hz, right? (In case the angular frequency is normalized) But...

Hello everyone. Iam trying to understand the discrete time Fourier transform for a signal processing course but Iam quite confused about the angular frequency.If I have a difference equation given, what values should I choose for my angular frequency if I do not know anything about the sample...

Thanks for all the comments and the link to the video lectures! But what about sinusoidal signals in example. What is the difference between a completely real valued sinusoidal and a complex one? What does the imaginary part do to the sinusoid? Cheers, Mike

Hello everyone. Iam about to read a course in DSP and I can't get my head why complex exponentials are used as input signals that often? Is it just to simplify the math? If not, what exactly is the imaginary part of a complex exponential? Does it "do" anything special compared to a real valued...

Hi again. Could you recommend any good tutorial on complex numbers? /Mike

Hi and thanks for your reply! I found this link here: https://www.st-andrews.ac.uk/~jcgl/Scots_Guide/info/signals/complex/cmplx.html So as far as I understand, the imaginary parts describes a kind of rotation (or change in phase) which is represented as the vertical coordinate? Mike

Hello everyone. Iam reading about complex numbers at the moment ad Iam quite confused. I know how to use them but Iam not getting a real understanding of what they actually are :-( What exactly is the imaginary part of a complex number? I read that it could in example be phase... Thanks in...

Hello everyone. Iam studying the LQR regulator in optimal control theory right now but Iam having some issues in understanding the approach of Bellmans principle. As far as I have understood, in Bellmans dynamical programming approach, one goes backward in time to find the optimal Gains K...

Thank you so much for clarifying! This helped a lot,! Cheers, Mike

Hi and thanks for the replyI guess I just got confused by the subsribts. And if I see correctly the integral is evaluated from t0 to t. Cheers, Mike

Hello everyone. Iam trying to get my head around a solution for an integral but I can't figure out how its done. I have given the following : x1'(t) = 0 x2'(t) =tx1(t) Where " ' " indicates the derivative. Talking the time integral the result is given by: x1(t) = x1(t0) x2(t) =...

Hello everyone. Iam just Learning about State space representation and controller design and have a fundamental question about the difference between classical Control theory and modern Control theory. I understood the state space is of advantage when dealing with MIMO systems or non-linear...