Hello Suppose you have sensors regularly laid out in a cross shape. with each sensor sampling a time series. Is there any meaningful way to look...

Hello Suppose you have sensors regularly laid out in a cross shape. with each sensor sampling a time series. Is there any meaningful way to look at the frequency spectrum of this data?

If I have a digital sampling of a signal that is centered at 100 kHz and I want to move it to 10 kHz, what is the easiest way to do...

If I have a digital sampling of a signal that is centered at 100 kHz and I want to move it to 10 kHz, what is the easiest way to do this? Thanks.

Hi All, Does anyone have a suggestion for a fast down sampling filter?

Hi All, Does anyone have a suggestion for a fast down sampling filter?

Hi, When I read wiki on importance sampling: http://en.wikipedia.org/wiki/Importance_sampling I do not understand the meaning...

Hi, When I read wiki on importance sampling: http://en.wikipedia.org/wiki/Importance_sampling I do not understand the meaning of: E[1(X> t)] Could you explain it to me? Thanks

Anyone have a link to a free compiler for these chips? using them as a base-band processor for an SDR Transceiver. Will use I-Q Sampling.

Anyone have a link to a free compiler for these chips? using them as a base-band processor for an SDR Transceiver. Will use I-Q Sampling.

Hello everyone, I read somewhere that if we want to resolve two frequencies using the fourier transform, one signal must have evolved an extra...

Hello everyone, I read somewhere that if we want to resolve two frequencies using the fourier transform, one signal must have evolved an extra 2 pi relative to the other. I am trying to picturise this, but am having trouble understanding this relationship. Can someone explain why this is so? Cheers, Anja

Hi all, In a manuals solution, I see when compute the discrete version with period T of z(t) where z(t)=x(t) * h(t), and they...

Hi all, In a manuals solution, I see when compute the discrete version with period T of z(t) where z(t)=x(t) * h(t), and they write: z(Tn)=x(Tn) * h(Tn). Where * is convolution, Based on this, can I refer that the following (1) and (2) are equal? 1. z(t)=x(t)*h(t) z(n)=z(nT). 2. x(n)=x(nT), h(n)=h(nT), z(n)=x(n)*h(n). I mean, is z(n) in (1) is equal to z(n) in (2)? T...

T see neither interpolation nor extrapolation when a CD player replace a missed with the previous one to fill in the time. I see it as just...

T see neither interpolation nor extrapolation when a CD player replace a missed with the previous one to fill in the time. I see it as just filling time with what is most likely a better value than one chosen at random. Is that too simplistic? Jerry

Hello, Anyone can point me to a source where I can learn how to read and capture video signals from one of those pinpole color camera into a...

Hello, Anyone can point me to a source where I can learn how to read and capture video signals from one of those pinpole color camera into a C6711 DSK? Like what type of A/D hardware I need and what the signal scheme is like?

Hi all, I'm looking for a good textbook that serves as an introduction to anti- aliasing filters, Nyquist frequency, sampling rates, SNR, low...

Hi all, I'm looking for a good textbook that serves as an introduction to anti- aliasing filters, Nyquist frequency, sampling rates, SNR, low pass filter design, etc. Can someone please suggest a reference? Thanks in advance, -weg

It was pointed out (more politely than one could have expected) that I miscalculated certain image frequencies. (I folded around the...

It was pointed out (more politely than one could have expected) that I miscalculated certain image frequencies. (I folded around the sampling frequency instead of around half of that, arriving at nonsense.) I've been wanting to acknowledge the correction and thank whoever sent it, but it's lost. Jerry -- Engineering is the art of making what you want from things you can get. ???????????...

What does it mean that spectra of a sampled signal is repeated at integer multiples of sampling frequency? I am struggling to visualise it.

What does it mean that spectra of a sampled signal is repeated at integer multiples of sampling frequency? I am struggling to visualise it.

Hello, I know that it is possible to demodulate an FM signal using a CORDIC ATAN core and the subtracting the current ouput of cordic...

Hello, I know that it is possible to demodulate an FM signal using a CORDIC ATAN core and the subtracting the current ouput of cordic from the last one. But I can not understand how carrier frequency and sampling rate would change it? What are the requirements? Where are the limitations? Regards

Hi, can you suggest a freely available speech codec which supports a sampling frequency of 20KHz. It should have both encoder and...

Hi, can you suggest a freely available speech codec which supports a sampling frequency of 20KHz. It should have both encoder and decoder, with as low memory foot print as possible regards, srikanth

Can any explain why discrete data can only contain frequencies between DC and one-half the sampling rate? Many Thanks

Can any explain why discrete data can only contain frequencies between DC and one-half the sampling rate? Many Thanks

we have a band limited channel with W =4kHZ if S/N=10db i have used SHANNON law to find the capacity of chaneel =14b/sec the question ...

we have a band limited channel with W =4kHZ if S/N=10db i have used SHANNON law to find the capacity of chaneel =14b/sec the question is please can we send 2 bit/symbole through the chanel at NYquist sampling rate or not????

If I can jump in here, I have to say I don't follow why you call a zero order hold an interpolation. I can see why it is *used* in the context of...

If I can jump in here, I have to say I don't follow why you call a zero order hold an interpolation. I can see why it is *used* in the context of interpolation, because of its simplicity. But if it is being done in real time where the subsequent data is not available for computation (because it does not exist yet), it is not really interpolation, by definition. When I looked u

This has been edited to resolve that the Unit Steps were the wrong way around ... -----ooooo----- Revised after peer review, approached...

This has been edited to resolve that the Unit Steps were the wrong way around ... -----ooooo----- Revised after peer review, approached with a little less haste So... Sampling with a period of T is given by (after asciification) as .. (T)sum (n : 0, inf)(d(t-nT) * f(nT) ) ... with * representing multiplication and not convolution as we are still in the time domain. Howeve...

I've played with several "standard" generalized routines for up- and down-sampling of audio, and now I want to get into the ones that really are...

I've played with several "standard" generalized routines for up- and down-sampling of audio, and now I want to get into the ones that really are more efficient in hardware or software - haven't decided yet - just know I want the most grunt for the least power, and because I'll be introducing nonlinearities and don't want artifacts. I presume I'll want to resample by factors of 2^n, which is ...

Guys can you please help i have an exam tommorow and would like to no if you can help me with my revision ,its basic stuff can you tell me the...

Guys can you please help i have an exam tommorow and would like to no if you can help me with my revision ,its basic stuff can you tell me the limitations on Sample &Hold .Aquisition time .Aperture time .Decay rate. belive it or not my lecture notes got robbed with my bag............. any help would be apreciated