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
Interpolation
Started by ●January 19, 2011
Reply by ●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 ●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 ●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 ●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 ●January 20, 20112011-01-20
On 01/20/2011 08:11 AM, Randy Yates wrote:> 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
