Requiring VHDL code for filter design using add and shift method

[Abhishek]

Hello Group,
I am working on a project entitled High speed filter design.
For the design i have to use the add and shift method. Working over
it, got stuck,
If anybody can gimme the code for the filter design using add and
shift method, it would be of immense help...
U can send the code to my mail address: (e-mail address removed).

PLS PLS PLS.. any body help me out.. asap

Thanks..

 

[Mike Treseler]

I am working on a project entitled High speed filter design.
For the design i have to use the add and shift method. Working over
it, got stuck,
If anybody can gimme the code for the filter design using add and
shift method, it would be of immense help...
U can send the code to my mail address: (e-mail address removed).

PLS PLS PLS.. any body help me out.. asap

I would drop the class.
It doesn't sound very interesting.

-- Mike Treseler

 

[kennheinrich]

I would drop the class.
It doesn't sound very interesting.

    -- Mike Treseler

Add and shift what? You can use add and shift to implement a
multiplier, if your synthesizer won't do it for you. For example, a
FIR filter with a coefficient of 17 needs an x17 multiplier in it. You
can implement that by shift and add: k*17 = k*16+k = (k<<4)+k. True
horror story: I once saw a guy fill up something like 114 hard
multipliers, in DSP slices, in a V4FX60 in order to multiply numbers
by 5 and 20.

If you're talking about adding shifted data, and how it affects
frequency response, you need to reread the math stuff - it's kind of
important that you understand what's happening in order to do a
sensible implementation.

- Kenn

 

[Andreas Ehliar]

If anybody can gimme the code for the filter design using add and
shift method, it would be of immense help...
U can send the code to my mail address: (e-mail address removed).

PLS PLS PLS.. any body help me out.. asap

Hi.

normally I'm sure that many people would jump on the chance to do your
homework for you. I simply don't understand why you haven't received
a solution yet. Perhaps everyone in the group is simply busy researching
the ultimate shift and add based filters for your perusal.

Why don't you read the following related documents while waiting for
the group to finish your homework? I'm sure they are going to be very
interesting for you:

METHOD AND APPARATUS FOR IMPLEMENTING A DIGITAL FILTER EMPLOYING
COEFFICIENTS EXPRESSED AS SUMS OF 2 TO AN INTEGER POWER
http://www.google.com/patents?id=KZEiAAAAEBAJ

SHIFT AND ADD DIGITAL SIGNAL PROCESSOR
http://www.google.com/patents?id=Q3goAAAAEBAJ

DIGITAL FIR FILTERS WITH ENHANCED TAP WEIGHT RESOLUTION
http://www.google.com/patents?id=hhM9AAAAEBAJ


HTH, HAND
/Andreas

 

[Mike Treseler]

I am working on a project entitled High speed filter design.
For the design i have to use the add and shift method.

Andreas has your solution.
Tell the Prof that the 'shift and add method'
has been patented, and you must consult
with your attorney before proceeding

-- Mike Treseler