Re: [Discuss-gnuradio] atsc speed boost

2006-05-19 Thread Charles Swiger
On Thu, 2006-05-18 at 17:56 -0700, Eric Blossom wrote: > On Wed, May 17, 2006 at 04:22:09PM -0400, Chuck Swiger wrote: > > On Wed, 2006-05-17 at 15:52 -0400, Charles Swiger wrote: > > > > > just collect data with decim = 10, then interp by 3 (6.4Msps to > > > 19.2Msps), then upshift. The 0.9 cod

Re: [Discuss-gnuradio] atsc speed boost

2006-05-18 Thread Eric Blossom
On Wed, May 17, 2006 at 04:22:09PM -0400, Chuck Swiger wrote: > On Wed, 2006-05-17 at 15:52 -0400, Charles Swiger wrote: > > > just collect data with decim = 10, then interp by 3 (6.4Msps to > > 19.2Msps), then upshift. The 0.9 code need two changes, one to > > Some more fat can be squeezed out

Re: [Discuss-gnuradio] atsc speed boost

2006-05-17 Thread Charles Swiger
On Wed, 2006-05-17 at 15:52 -0400, Charles Swiger wrote: > just collect data with decim = 10, then interp by 3 (6.4Msps to > 19.2Msps), then upshift. The 0.9 code need two changes, one to Some more fat can be squeezed out of the pipeline if the 'upshift to 5.75MHz' and FPLL could be combined. B

[Discuss-gnuradio] atsc speed boost

2006-05-17 Thread Charles Swiger
This works a bit more effeciently in matching a usrp to the atsc code (either all 0.9, or part 0.9 and part 2.x): Instead of: collect data with usrp decim = 8, then interp by 5 (8Msps to 40) then decim by 2 (40Msps to 20) while upshifting to 5.75MHz - just collect data with decim = 10, then inter