Hello,
I am currently implementing a system where a receiver monitors the
channel, senses the non-allocated OFDM carriers, and transmits through
the gaps.
I have created a block that lets me estimate those gaps in the
spectrum, but I have several doubts about how it interacts with the
rest of the flowgraph:
1. I want the block to transmit the range of unallocated carriers
to another part of the flowgraph. I've read about the Probe blocks and
message passing, but they look overly complicated for the task. Could
I directly access a GRC variable from my python code and set its value
to the new range? Or should I use messages / probes?
2. It depends on the first question, but if I wanted to first
average the obtained unallocated carriers and then transmit the value,
how would a block that transmits 1 value every 5 inputs work in this
situation? I guess messages would make more sense, as I could send the
message once I am sure of the carrier allocation, and only update the
variable with meaningful values.
3. As for the Carrier Allocation block, I've read in
https://lists.gnu.org/archive/html/discuss-gnuradio/2014-02/msg00416.html that
it is not possible to update the allocated carriers during execution.
When implementing a new block capable of doing that, would the
constant change of the allocation cause problems with the tagged
stream of constant length that comes before it?
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