Dear,
Could you please let me know, how to set FSM args value in Trellis coder. I am
also using trellis coder for my work Please reply ASAP.
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I'm not exactly an expert on this, but correct values
for the DVB-S trellis encoder (1/2 rate, G1(X) = 121,
G2(Y) = 91) are:
1, 2, (121, 91)
My DVB-S transmitter repository is here:
http://github.com/drmpeg/gr-dvbs
Ron
On 4/27/2014 11:12 PM, siva kumar wrote:
Dear,
Could you please let me
Hey Siva,
in [1] I parameterized the trellis module for a rate 1/3 code as used in
LTE. Maybe that helps. I put a lot of comments in.
Besides if you tell us what you want to achieve exactly, someone might
give more specific hints.
happy hacking
Johannes
[1]
in the past Achilleas wrote:---
There are a couple of potential problems with your flowgraph:
1) the trellis encoder outputs unpacked bytes. For example, if your FSM has
output cardinality 4 then it outputs 2 useful bits per byte.
Are you sure you are handling this the right way at the
There are a couple of potential problems with your flowgraph:
1) the trellis encoder outputs unpacked bytes. For example, if your FSM
has output cardinality 4 then it outputs 2 useful bits per byte.
Are you sure you are handling this the right way at the packet encoder?
I do not know how that
Hello Achilleas Anastasopoulos
Sorry for my delay.
Well,I try to start the example (interference_cancellation.grc) but do
not succeed.
I put the trotle and then the warning disappears, but the error not.
I installed the gnuradio by synaptic.
in ubuntu, i think the Program Files directory is
please change the prefix variable in this grc graph to the
absolute path of your gnuradio tree.
Eg, in my machine it is
/home/anastas/gnuradio_trunk/
Also, you might want to put a throttle somewhere.
Achilleas
On Sat, Oct 23, 2010 at 3:19 PM, Francisco Llaryora fllary...@gmail.com wrote:
Hello ,
I am using trellis encoder and trellis viterbi block, to get a
error corecction method.
i take a snapshot for you:
http://img213.imageshack.us/img213/3435/pantallazoxe.png
The flow:
---Packet Encoder---DBPSK Encoder--DBPSK Decoder---Packet Decoder
works perfect.
Problem is
Can you be more specific as to WHICH example in the gr-trellis
directory does not work.
Achilleas
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Hello Achilleas.
Forgiveness for mysticism about the example.
is interference_cancellation.grc (GNU Radio Companion 3.2.2)
http://pastebin.com/N61P7tiP
/usr/share/gnuradio/examples/grc/trellis/interference_cancellation.grc
the error:
[error]
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