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98 Threads found on edaboard.com: Fir Iir Filter
i m doing a project on implementation of iir filters using system generator based fpga. i m using spartan 3 starter kit for this purpose however i m facing problem as it is not providing me with any iir filter response while on the same fpga fir filters are working properly, can sombody help (...)
In some Energy Metering IC, AD sample signal at more than 200kSPS, then HPF(remove DC), square, LPF, square root. My question is if asmple is 200kSPS, input is 50Hz, normalized freq is 0.0005. If i use fir filter, order of HPF(remove DC) is very large. Can someone show me how can i design this HPF. Thanks.
The following are informative examples of iir filter design using PICs: Chapter 3: Infinite Impulse Response (iir) filters Microchip Appnote AN852: Implementing fir and iir Digital filters Using PIC18 Mic
Hello, I am trying to show the difference between the outputs of fir and iir filters. However the phase distortion in the iir filter output is not evident. Here are the scripts: (...)
Hi every one. I used FDATOOL to generate chebyshev 2 iir filter with sampling rate of 95KHz and clock frequency of 12.160MHz. I want to pass frequency from 0 to 15 KHz and stop it at 18KHz. From magnitude response of FDATOOL every thing is fine and it pass up to 15KHz with 0dB when attenuate for higher frequency. I generate HDL code with help of ma
Hi guys, anyone can help me on this? Thanks
Current Processors can compute 1 output per cycle for a 10 tap fir filter, may take 3-4 cycles per 1 output for a 10 tap iir filter. Hope that helps........
Hi, I am doing survey on "Hardware modules of Signal Processing", Anyone has any material related to fir/iir digital hardware using MACs? Useful links will also be helpful. Thanks, Regards, Naveed
How long is the wiring between the sensor and the micro? If it's long (like 40cm or so) then you might want to use a shielded cable for that. And what is the time constant or cutoff frequency of that RC filter? It might be just bad component calculation. Other solution would be to implement an iir or fir filter inside MCU, (...)
There's some code involved like CIC filter, fir filter, iir filter ,Cordic algorithm and FFT in the book "Digital Signal Processing with Field Programmable Gate Arrays".Hope it would be helpful.
Hi saatwik, I'm not specialized in audio technology (I guess you are speaking about audio applications), but I can guess that if fir filter are not used, this is because the same result is obtained more simply with iir. Of course, peak and notch filters can be made in fir. But: a) if the (...)
Here's a few links to DSP in C tutorials to get you started: Introduction to fir Digital filters The simple fir filter
Hi! i have build ECG acquisition hardware and then acquired this signal in MATLAB and LabVIEW using DAQmx(Data Acquisition device). the sampling ratewas 500Hz. is this rate ok? please help me with further filtering process, either iir or fir My design is output is here [
Hello Experts, The output of the fir filters is convolution of the input signal and the filter kernel. In that case, the length of the output signal should be greater than input signal by M-1 points where M is the length of the filter kernel. x=ecg(500)'+0.25*randn(500,1); %noisy waveform (...)
the coefficients play a large role in the filter design. Any fir filter can be normalized (not including quantization issues). stable iir filters can also be normalized (and excluding quantization issues).
I am having a wave file i want to downsample the signal with lets suppose M= 5. So first i have to use Low pass filter of 6 KHz I know this can be done with upsample and downsample command of matlab but is there any a way i can do downsampling without built in command of matlab thanks
firstly try only spectrogram(x), then check other options if needed.
Hi, Can you please elaborate further on what kind of a filter you wish to implement? iir or fir? And what is the sampling frequency for your problem? Also is the higher frequency cutoff 40KHz or 40MHz? Mohit
There is nearly nothing to add - perhaps one fir property which in many cases is important: fir filters have a linear phase function (opposite to iir filters).
Clearly the answer depends on the type of impulse response. To represent an arbitrary impulse response, you would need a respective number of fir coefficients. Some classes of responses may be reproducable with a rather short iir structure, others not at all. Generally, the advantage of iir shows with representing time-continuous (...)