Yes. BPSK Mapper is custom block though it isn't written by me.Both encoders
and decode objects parallelism level are defined as 1. Actually when I rebuild
the flow graph, connect each block in turn, it runs in the first time but then
comes back to that situation.
Hoang Ngo-KhacResearch Assistant - Lab. of Signal and System, FET, UET, Vietnam
National University-Hanoi (VNU-H)Alternative email: khachoang1...@gmail.com,
hoangnk...@vnu.edu.vnMobilephone: +84.163.682.7874
From: t...@trondeau.com
Date: Fri, 10 Oct 2014 16:02:50 -0400
Subject: Re: [Discuss-gnuradio] FEC gnuradio 3.7.6 error
To: khachoang1...@outlook.com.vn
CC: discuss-gnuradio@gnu.org
On Wed, Oct 8, 2014 at 11:12 PM, Hoang Ngo-Khac <khachoang1...@outlook.com.vn>
wrote:
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
I'm assuming that BPSK Mapper is your own block? I'm wondering if there's
anything in there that would cause this problem. Connecting one block instead
of another should not cause any different behavior in the preceding block.
For the encoder and decoder objects, are you defining them with any level of
parallelism?
Tom
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