Dear all,
I am checking FEC Extended Encoder/Decoder in gnuradio-3.7.6 and would like to
embed it in my OFDM transmission.
First, I run the flowgraph below. It works and I can see how FEC improve the
results.
However, when I change some blocks, for example, using BPSK
Mapper (as below), it throws me the error:
terminate called after throwing an instance of 'std::invalid_argument' what():
destination already in use by edge deinterleave0:0->fec_encoder0:0
When I modify the flow graph, this error happen regularly even when the new
inserted block is not connected dirrectly to Encoder or Decoder block. To make
FEC work with my OFDM transmission, I need to make the Encoder and Decoder work
compatibly with my blocks. But as you can see, it stops working with when I
insert BPSK Mapper to the flow graph, let alone more complicated blocks like
OFDM Modulation.
Please help me to figure out the problem and fix it. Any clue would be
appreciated.
Best,Hoang Ngo
Hoang Ngo-KhacResearch Assistant - Lab. of Signal and System, FET, UET, Vietnam
National University-Hanoi (VNU-H)Alternative email: [email protected],
[email protected]: +84.163.682.7874
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