Hi Guys, I want to have a band pass filter with cutoffs 0.15Hz and 2Hz and also a low pass filter with a cutoff of 10Hz. I want to choose...

Hi Guys, I want to have a band pass filter with cutoffs 0.15Hz and 2Hz and also a low pass filter with a cutoff of 10Hz. I want to choose either one at a time. I have to give the sampling frequency to both filters and so if I give the same sampling frequency, is it not going to be a problem? How do we decide which sampling frequency works well for both filters? Please give me some info ove...

Hi All, i was going through DSP book by proakis, there i came across the following realted to for which sampling frequency what is the...

Hi All, i was going through DSP book by proakis, there i came across the following realted to for which sampling frequency what is the fft lenght to be used like, Sampling Freq FFT Length 8KHz 256 22KHz 512 32KHz 1024 44.1/48KHz 2048 My query is on what...

hi, suppose I have the FIR channel with 10 taps. My target sampling rate is, for example, 50MHz, i.e., the sampling period is 20ns. But my...

hi, suppose I have the FIR channel with 10 taps. My target sampling rate is, for example, 50MHz, i.e., the sampling period is 20ns. But my channel taps do not fall on integer units of the sampling period, say they fall on 33, 44, 55, 66, 77, 88, 99, 111, 122, 133 ns respectively. What shall I do to create a FIR channel with taps falling exactly on integer number of samplings? thank you in a...

Hello, In another post I asked about interpolation and sampling and I got some good response. After reading them, I am now interested in...

Hello, In another post I asked about interpolation and sampling and I got some good response. After reading them, I am now interested in non uniform sampling and interpolation. What I am interested is to solve following type of problems: Assuming I have a 1D signal that the value of it is known at n=[1 3 4 6 9 10 15 19]. I want to calculate the values at other points {n=[0 2...

I have some questions regarding the sampling frequency of a digital filter? This is the rate at which the internal stages are clocked, why does...

I have some questions regarding the sampling frequency of a digital filter? This is the rate at which the internal stages are clocked, why does this have to be twice the incoming data rate. I don't understand where Nyquist comes in the filter design.Our incmoing data was generated by sampling a analog at twice frequency, and now my filter must run at twice the data rate.Why?

Please forgive me if this is the wrong place to ask such a question as this, but I really don't know offhand where else to inquire. I am...

Please forgive me if this is the wrong place to ask such a question as this, but I really don't know offhand where else to inquire. I am a musician who often works with WAV files and am trying to understand how sampling works as there have been several holes in my head as to how it works for many years. I have never actually had sampling explained to me, so what I am going to do is write ou...

Hello, I am writing a digital filter but it seems that according to the sampling frequency my filter should change ... how does...

Hello, I am writing a digital filter but it seems that according to the sampling frequency my filter should change ... how does this happens ? being a digital filter there is no such a thing as sampling frequency, right ? One more thing ... it seems that the cut off frequency should affect my filter too ... the cut off frequency is the bandwidth of the transmitting c...

i've done my sampling like this is it correct ? i'm sampling a 3GHz signal; design for 8 bit sample double array[256]; //8 bit so double...

i've done my sampling like this is it correct ? i'm sampling a 3GHz signal; design for 8 bit sample double array[256]; //8 bit so double amplitude=100; double frequency=3000000000; for(int i=0;i

Hello, I am running the "talkthru"-example on ADSP21364 EZ-KIT. The sampling rate is 48kHz. Is it possible to reconfigure the sampling...

Hello, I am running the "talkthru"-example on ADSP21364 EZ-KIT. The sampling rate is 48kHz. Is it possible to reconfigure the sampling rate to 8kHz? Thanks.

Carlos Moreno wrote: > lucy wrote: > > > Hi all, > > > > Can non-uniform sampled signal be used to perfectly reconstruct the > > ...

Carlos Moreno wrote: > lucy wrote: > > > Hi all, > > > > Can non-uniform sampled signal be used to perfectly reconstruct the > > original continuous time signal? > > > > What is the Nyquist sampling rate in the non-uniform case? > > > There's an easy way to look at this. > > Imagine that you have a sampled signal -- standard, uniform > sampling at a rate within Nyquist. > > That mea

Hello folks, I think this problem was addressed before but it wasnt quite solved. I have a system running at 8000Hz sampling rate. I need to...

Hello folks, I think this problem was addressed before but it wasnt quite solved. I have a system running at 8000Hz sampling rate. I need to mix (multiply) my incoming sampling signal with a 3000Hz tone. The problem is, 3000 is not a nice division of 8000. Hence the samples produced dont quite generate a "clean" 3000Hz, and I end up getting artifacts. Stepping through a sine table at ...

I am measuring a transient oscillating signal and have been wondering about the optimal sampling scheme to determine the decay and...

I am measuring a transient oscillating signal and have been wondering about the optimal sampling scheme to determine the decay and frequency. The model is S = A.exp(-Bt).sin(Ct) and I can sample about 5 points before the signal has decayed to zero. I have reasonable estimates for C so I have been sampling at the peaks and troughs, ie. when the sin term is approximately +/- 1. It seems to work...

Hello, I have an ENG signal, sampled at 25kHz that has high mains interference that I want to remove. The problem is I need the surrounding...

Hello, I have an ENG signal, sampled at 25kHz that has high mains interference that I want to remove. The problem is I need the surrounding frequencies, maybe not 50-70, but I can't afford to sacrifice much more than this. The filter designs I've been looking at don't seem to be able to do this at such a high sampling rate. Any suggestions? Would downsampling help? Thank you in adva...

Hi, Does anyone know if there is a program out there that can change digital data in the form of binary files back into analog to resample it...

Hi, Does anyone know if there is a program out there that can change digital data in the form of binary files back into analog to resample it to a different sampling rate? I guess, the whole point of this is to get a different sampling rate. Is it possible? Seems pretty unheard of to change it back to analog.. :X Thanks!

Dear all, I have to develop an application with the following basic requirements: - 40 analog channels of Voltage/Current - ADC with 16 bits...

Dear all, I have to develop an application with the following basic requirements: - 40 analog channels of Voltage/Current - ADC with 16 bits of resolution - at least 96 sample point per cycle (50 and 60Hz), which means 4800 and 5760Hz of sampling frequency - simultaneous sampling of all channels The main concern is data acquisition. It is a like a data logger. Since a lot of mat...

I recently started simulating a HiperMAN/WiMAX PHY on MATLAB. However, in the standard available in the ETSI website, there is mention of a...

I recently started simulating a HiperMAN/WiMAX PHY on MATLAB. However, in the standard available in the ETSI website, there is mention of a "sampling frequency" and a term "bandwidth over sampling frequency". I haven't a clue as to what these terms mean and where they're used in the OFDM process. Could somebody shed some light on what these terms mean in the context of OFDM? Thanks Neelabh...

Suppose I take samples at once per minute for a data logger. Do I still need an anti-aliasing filter? The sampling freq would be 1/T where T=60...

Suppose I take samples at once per minute for a data logger. Do I still need an anti-aliasing filter? The sampling freq would be 1/T where T=60 secs...so how is this possible? The values of the capacitors etc would be hugh. Of course I could over-sample1000s of times...is this the norm? K.

Hello People I have been scratching my head on this doppler problem: Because of the doppler effect, the received signal will either be...

Hello People I have been scratching my head on this doppler problem: Because of the doppler effect, the received signal will either be expanded or compressed on time axis. Now, the expansion or compression is sampling rate conversion. So, I tried to use 'resample' function of matlab. The actual length of the signal is 30720 and sampling freq is 48000Hz. Now, when I use y=resample(x,100...

Hi all, I am another guy getting stuck with the same old stuff! The relationship between point in a frequency response and the sampling...

Hi all, I am another guy getting stuck with the same old stuff! The relationship between point in a frequency response and the sampling frequency/time characteristics of the impulse response. I have created a custom frequency array, representing a frequency response from an algorithm, between 0 and 300Hz, with 0.2Hz resolution, ie 1500 points. I then need to create the impulse response from ...

Hi, I have a conceptual question for the group, which I have been struggling with. It can be summarized as "what is the difference between...

Hi, I have a conceptual question for the group, which I have been struggling with. It can be summarized as "what is the difference between sampling offsets and carrier offsets on a received constellation?". In more detail... Suppose there is a demodulated BPSK signal at the output of an ideal bandpass channel and the receiver is perfect. The received constellation will be at +1, -1. No...