How to design digital ajustable FIR filter?

[Raidum226]

How to design a digital FIR filter with cutoff frequency range from 4MHz to 6MHz? And we don't have any multiplier, we just have some adders.

 

[Renjith]

How to design a digital FIR filter with cutoff frequency range from 4MHz to 6MHz? And we don't have any multiplier, we just have some adders.

which is ur target device?
which tool r u using to design this fir?

 

[panda]

i think , for FIR algorithm, it is impossible to use only adders

 

[Raidum226]

If we just need a FIR filter with cutoff frequency = 4MHz, and sampling frequency = 20MHz. We can use Matlab to generate the FIR filter coefficient. Last, we can use adders to implement this filter.(or multiply a number by a const).

But If we need a FIR filter with cutoff frequency range from 4MHz to 6MHz, how to inplment it without using multipliers.(just use const. multipliers)