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73 Threads found on Fir Coefficients
Hi All, I have to implement a tapped fir filter which has fixed point coefficients. I am considering using the proposed IEEE fixed point package. From what I have read on Xilnx and edaboard forums the package does not seem to give correct synthesizable results and/or is not well supported. I am not sure if these issues are fixed or not. I
I am designing a 9-Tap fir filter, I have used MATLAB to get the filter coefficients -0.0041 0.0077 0.0893 0.2433 0.3276 0.2433 0.0893 0.0077 -0.0041 I have multiplied all the coefficients with a scaling factor to scale them to 16bits. The input to the filter are random 200 values generated by a custom MAT
Hi, When I read a tutorial on fir implementation on FPGA, I am not clear about "partial results can be used for many multiplications (regardless of symmetry)" That slide may be based on multiplier with logic cell in FPGA, not a dedicated MAC in FPGA. Anyhow, I don't know why 'partial results can be used for many multiplications (r
Under this article using xilinx FPGA , a process is only to implement a upsample factor of 4 ,a 16 fir filter coefficients are used, so what if a upsamle factor is 10 , is it need to use 100 fir filter coefficients ?
Hi all, i have designed a low pass fir filter in verilog in which co-efficients are in 0.0XXX range.. i tried $realtobits (is it synthesizable?) and i get the following warning.. "System function call realtobits not supported" how do i implement synthesizable floating point values in my verilog code..please explain with an example.. below
Is there an easy or straightforward way to analyze a frequency response plot/filter profile of a digital filter and determine it's architecture (number of taps, fir vs IIR, decimation rate, coefficients, etc) For example, what information do i have about the filter and it's implementation by looking these plots (these are two different filters)
Hello All !!!!! I am trying to implement fir filter on FPGA. I am not able make out how to go about it. I have calculated the coefficients and written a verilog code.There is 12 bit ADC which will provide the input. I am thinking of converting the 12 bit input into decimal, then apply the filter equation, then convert the answer into binary again
Hi everyone. I have an OFDM signal and I simulated my feedback signal with delay version of input signal. So now I want to calculate the amount of delay. I know we can do it with matlab function xcorr but I want to do it with fir filter which the coefficients are the reverse of input signal. I calculate with both Xcorr function and with fir (...)
Keep in mind that IIR/fir. specify the underlying filter structure, while adaptive refers to how the coefficients are updated. You probably are looking for an adaptive fir filter that uses the LMS algorithm.
Hi all, I am designing a interpolated fir filter. I have designed fir filter using the coefficients that I got from matlab. But how to design a 2 stage interpolated fir filter with pass-band gain of 6.02 db. I read many Ifir filters which uses linear interpolation/b spline interpolation. But I did (...)
Hello every body, can any body help me for designing fir filter for the ECG noisy ECG signal , with the following task The fir filter coefficients are chosen as {0.8 0.1 0.1}. After filtering the signal in the forward direction, we reverse the filter coefficients and run the sequence back through the filter. please i (...)
Hello I need your kind attention and help for my problem. I have to design fir filter using genetic algorithm in Matlab,kindly help me to design such filter. Basically the problem is optimization of the filter coefficients using GA. In this the objective function 'error=weight(desired-actual)' is used. We have to minimize this using GA. H
sir/mam, could u please help me in building my project. my project title is "IMPLEMENTATION OF fir FILTER USING TMS320VC5416". For now i have generated the filter coefficients of the filter in MATLAB. i now need to program the filter in code composer version4 software using c language. could u plz help me now....
Hi, do you know how we are selecting the fir filter coefficients for implementing it ?
Hello, I'm trying to implement an fir filter in Verilog and was wondering, if there's any practical way to truncate/round the MAC outputs in order to get the same output bit length as the input. I would simply round the output of the filter to the nearest quantization level, but maybe someone has a better idea. Ans how about when using multis
Can anyone please explain me how to implement and get Filter coefficients using Matching Pursuits Generalized Bit plane Algorithm (MPGBP)???
Hi all, I am designing fir Filter on FPGA and importing coefficients from fdatool of matlab. The response i am getting in the Xilinx fir Filter core is quite different from the simulated in the matlab. Can anybody please tell me what can be the possible cause of the error. Thanks
the first test is to do time domain tests. An impulse like 0x40, 0,0,0,0,0 ... this will give scaled versions of the coefficients. This is a good test signal for systems that perform rate-changes as well. This is mainly to show the filter was correctly translated to HDL. Variations on this can be done. Ideally, if the coefficients are (...)
Hi I am trying to implement 8 tap (7th order) Low Pass fir Filter in ASIC semi custom design by writing its verilog code & testbench .. How do I represent the filter coefficients in the code ( which may be +/- ve and have fractional parts) ..? Can I write direct statements for addition & multiplication in the code like : assign P3 = D2 * b
I'm about to use the fir compiler IP core and I'm importing my coefficients from Matlab. I want to make an interpolation filter, so I'll specify the Interpolation rate value to be what I want. My question is: should the coefficients be for the upsampled filter, or not? For instance, if I want a RRC filter with 1:150 interpolation that (...)