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Re: [Discuss-gnuradio] OFDM frame equalizer length tag
From: |
Michael Dickens |
Subject: |
Re: [Discuss-gnuradio] OFDM frame equalizer length tag |
Date: |
Wed, 06 Dec 2017 20:02:27 -0500 |
Hi Alice - If I had to guess, it would be that the tag for the frame_equalizer_alix block is "frame_len", while that for the Pseudo-Random Generator is "frame len" ... without the "_" joining the words. Or, that's what it looks like in the image. The tagged_stream_block is picky about these names; they really have to be identical!
A word of advice: Assign a variable that holds this string value, and set all of the blocks that use it to the variable. Make the variable name and it's value something other than "frame_len" alone ... for example, "frame_len_alix" or the like ... a name that will be clear in debugging that it is either there and correct or not (and thus incorrect).
Hope this helps! - MLD
On Wed, Dec 6, 2017, at 05:54 PM, Alice Lo Valvo wrote:
Hi,
I duplicated the OFDM Frame Equalizer block, and all it works, I
added a second input port which is connect with another block that
is a tagged_stream block. I don't understand the reason of this
error:
gr::log :FATAL: frame_equalizer_alix0 - Missing a
required length tag on port 1 at item #0
thread[thread-per-block[49]: <block frame_equalizer_alix
(17)>]: Missing length tag.
Length tag is there.. any ideas?
Thanks in advance.
Alice
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