FIR filter using matlab

[Shahid hussain]

hi everyone

I am new to matlab and I need matlab code for FIR filter without using the inbuilt matlab functions and that too in time domain...

 

[lordy]

for filter design matlab is used to generate the coefficient of filter.

if number of sample is n if ur output is y and input is x and ur filter is second order Fir filter

u can write

for i =2:n

y = a0*x + a1*x(n-1)
end

a0, a1 is coefficient of filter u can extend the equation according to ur order of filter .

 

[Shahid hussain]

Thank you for your reply.

Actually i want to design a multipath communication channel using fir filter, like a0,a1,a2...would be the gain of those paths and there would be delay associated with each path and that would be a real no. rather than integer, so that as a impulse response of the channel I get the Varying amplitude impulses shifted by some real no.(i.e. time delay of the path)...

 

[12micc16]

my input is sinewave with noise..and i implement 2 nd order fir filter..i want matlab code..

- - - Updated - - -

Hi,


I generated sine wave with 50Hz and added noise to it.
After that, I want 2 design a simple FIR filter with order=2 and I apply this filter to my signal with ""filter"" function in MATLAB(Build in function).
i want to matlab code..plz guide me

Thanks in Advance.

 

[lordy]

so as you know the filter command you have to just design a filter to get the coefficients from that go to matlab and check ''fdatool'' OR ENTER fdatool in ur matlab terminal u will get a gui . from that design ur filter and from export the coefficients to matlab terminal thats it