Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

iir implementation in fpga problem!!!!!!!!!

Status
Not open for further replies.
R

rsrinivas

Advanced Member level 1
Joined
Oct 10, 2006
Messages
411
Helped
50
Reputation
100
Reaction score
11
Trophy points
1,298
Location
bengalooru
Activity points
3,689
Hi all,
I have a problem.
I am into designing an array of bandpass filters so that it forms a filter bank.
I have designed the filter in matlab using fdatool and generated the hdl (verilog)
code from it.it's a 6'th order bpf with 3 biquads(IIR Butterworth).
pls do let me know that if i can reuse this filter.i.e i am using a serial
architecture to process the samples and the coefficients are stored in a rom.
how do i effectively reuse the delay sections.

any suggestions or help would be greatly appreciated.

cheers
srinivas
 

of course, you can implementation IIR as a FIR filter, and only with one multiplier.

such as y(n) = b(0)*x(n) + b(1)*x(n-1) + a(0)*y(n-1). You can use register store x(n), x(n-1) and y(n-1), and Time division using the multiplier, and accumulute three multiplier outputs to get y(n). After get y(n), replace y(n-1) register with y(n), and same to x(n) and x(n-1), and then you can get y(n+1) as y(n).

Maybe misunderstanding your requirement.
 

Hi
Thanks for the reply.
I can do it but as i have quantized the filter scaling has been introduced.
What i want to have is a filter bank so i think i can reuse the filter coefficients by putting them in a ROM. But how do i handle the delay sections.As i am planning to have a serial architecture the context of each filter stage(a stage is one among the number of filters in a filter bank)has to be preserved.Can i do it.

Thanks in advance

cheers
Srinivas
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top