On further thought, not all resamplers need filters. In fact this may
be about the ideal case where a resampler does not need a filter.
If you are resampling a signal that does extend fully to the band
edge, and your resample ratio is close enough to unity to avoid
aliasing at the target new rate,
eh, nevermind, hit send too quickly on a long day (decimators are
probably a special case, but rational resamplers when they interpolate
are going to generate aliases that fold back in band when decimated,
so yeah never mind)
John Murphy
jmur...@comsonics.com
On Thu, Jun 18, 2015 at 1:20 PM,
I uploaded a pair of images to show.
http://imgur.com/a/qAtEX#1
This is with an Epsilon of 1-1e-7.
The signal droops at the edges as shown in the images then returns to
normal, cyclically, at a rate that depends on the offset of Epsilon
from unity.
With these settings the cyclical rate is about 30
On Wed, Jun 17, 2015 at 2:14 PM, Murphy, John jmur...@comsonics.com wrote:
I uploaded a pair of images to show.
http://imgur.com/a/qAtEX#1
This is with an Epsilon of 1-1e-7.
The signal droops at the edges as shown in the images then returns to
normal, cyclically, at a rate that depends on
Any signal must be correct just because it is different?
I am talking about pretty severe amplitude effects (several 10's of dB
droop, accompanied by phase shift beyond what the timing error does)
near the band edges.
I don't think I should expect that from timing change. If I connected
another
On Wed, Jun 17, 2015 at 12:56 PM, Murphy, John jmur...@comsonics.com
wrote:
Any signal must be correct just because it is different?
I am talking about pretty severe amplitude effects (several 10's of dB
droop, accompanied by phase shift beyond what the timing error does)
near the band edges.
Shouldn't this be an expected effect?
if signal.isactuallysampledat() != signal.thewaywepretenditssampled()
Then should you expect phase and frequency effects?
On 2015-06-17 11:59, Murphy, John wrote:
Questions about the Channel Model block from gr::channels::channel_model
Noiose
Questions about the Channel Model block from gr::channels::channel_model
Noiose Voltage and Frequency Offset work as expected.
I've been using a Seed of 0 and no multipath so Taps of 1+0i. Have not
seen any issue there although one does have to be careful to not use
Taps of just 1 for whatever
