> On 01/20/2011 07:20 AM, tom wrote:
>> On Thu, 20 Jan 2011 02:04:40 -0500, Randy Yates <yates@ieee.org> wrote:
>>> Explain to me how you would interpolate by 1.25?
>>
>> Upsample by 4 then downsample by 3. What is the the best way to do this in fpga.
>
> That would give you 1.3333...
>
> I think the best way is just to directly upsample by 5. You might investigate
> your frequency planning and the possible use of CIC filters.
Hi again, Tom,
Regarding CIC filters and sample rate conversion, I recommend Rick Lyon's
book. He has a lot of good information on both of these topics, and he
has a brand new edition that just came out.
--Randy
@BOOK{lyons2011,
title = "{Understanding Digital Signal Processing}",
edition = "Third",
author = "{Richard~G.~Lyons}",
publisher = "Prentice Hall",
year = "2011"}
--
Randy Yates % "My Shangri-la has gone away, fading like
Digital Signal Labs % the Beatles on 'Hey Jude'"
yates@digitalsignallabs.com %
http://www.digitalsignallabs.com % 'Shangri-La', *A New World Record*, ELO
Reply by Randy Yates●January 20, 20112011-01-20
On 01/20/2011 07:20 AM, tom wrote:
> On Thu, 20 Jan 2011 02:04:40 -0500, Randy Yates <yates@ieee.org> wrote:
>> Explain to me how you would interpolate by 1.25?
>
> Upsample by 4 then downsample by 3. What is the the best way to do this in fpga.
That would give you 1.3333...
I think the best way is just to directly upsample by 5. You might investigate
your frequency planning and the possible use of CIC filters.
--
Randy Yates % "My Shangri-la has gone away, fading like
Digital Signal Labs % the Beatles on 'Hey Jude'"
yates@digitalsignallabs.com %
http://www.digitalsignallabs.com % 'Shangri-La', *A New World Record*, ELO
Reply by tom●January 20, 20112011-01-20
On Thu, 20 Jan 2011 02:04:40 -0500, Randy Yates <yates@ieee.org>
wrote:
> Explain to me how you would interpolate by 1.25?
Upsample by 4 then downsample by 3. What is the the best way to do
this in fpga.
Reply by Randy Yates●January 20, 20112011-01-20
On 01/20/2011 02:04 AM, Randy Yates wrote:
> [...] ?
.
--
Randy Yates % "My Shangri-la has gone away, fading like
Digital Signal Labs % the Beatles on 'Hey Jude'"
yates@digitalsignallabs.com %
http://www.digitalsignallabs.com % 'Shangri-La', *A New World Record*, ELO
Reply by Randy Yates●January 20, 20112011-01-20
On 01/19/2011 10:37 PM, j wrote:
> What is the most economical way to inplement an interpoaltion by 5 on an FPGA. is it 2 x 2 x 1.25 ?
Explain to me how you would interpolate by 1.25?
--
Randy Yates % "My Shangri-la has gone away, fading like
Digital Signal Labs % the Beatles on 'Hey Jude'"
yates@digitalsignallabs.com %
http://www.digitalsignallabs.com % 'Shangri-La', *A New World Record*, ELO
Reply by j●January 19, 20112011-01-19
What is the most economical way to inplement an interpoaltion by 5 on an FPGA. is it 2 x 2 x 1.25 ?
Thanks
Tom