Christoph Thein wrote:
Hi Matt,
the new image seems to solve the problem. Thank you!
What did you change in the code?
Cheers,
Christoph & Hanwen
Great news. The basic issue is that since the halfband decimators
decimate by 2, they have an internal state (which we call odd or even).
The design wasn't syncing this state, so I added a small amount of
code to resync the filters when they are enabled. The CIC was already
doing this, so you didn't see the problem when only using the CIC and
not the halfbands.
If you want to see exactly what I changed, it is here:
http://gnuradio.org/cgit/matt.git/commit/?h=rx_mimo_hb_sync
You can check the code out from the rx_mimo_hb_sync branch from matt.git
on gnuradio.org.
Johnathan -- please merge this to the mainline and put up a new image
for general use.
Thanks to both of you for reporting this bug. Anybody doing MIMO
reception should probably update to this new version.
Matt
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