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[Discuss-gnuradio] problem with packet decoder for gmsk
From: |
Ank |
Subject: |
[Discuss-gnuradio] problem with packet decoder for gmsk |
Date: |
Wed, 26 Mar 2014 04:30:04 -0700 (PDT) |
Hello all,
I'm working on gmsk transmitter and receiver past 6 months , the problem
that I'm facing is in the packet decoder.
I tried with wav file and signal source it worked good.
my block is of this type
Random_source=>Packet_encoder=>gmsk_modulator=>rational_resamlper_1=>uhd_sink
uhd_source=>rational_resampler_2=>low_pass_filter=>gmsk_demodulator=>packet_decoder=>scope_sink/file_sink
In rational_resampler_1 with interpolation=2, decimation=1
rational_resampler_2 with interpolation=1, decimation=2
I'm able to detect fft and constellation using scope_sink after
gmsk_demodulator,
but after packet_decoder I'm not able to see any signal in the scope_sink
or there will be no data in the file if I write using file sink, it will
be of 0 size, no data will be written.
I used packet decoder with default values ,no output in scope_sink or file
_sink, threshold =-1, access code empty.
even I tried with changing the values of threshold from 50 to -50 , no
output, kept access code empty.
How to configure the packet decoder or any alternative idea.
I'm working on the transmitting data/file that has to be seen on scope_sink
or to be written in the file using file sink.
In this case the input data is random source how to receive it, If I want
to transmit .txt/.dat file how to construct block
should follow same step or something else.
Thanks
in advance
Ank
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