I appreciate your approach and i guess i will need goertzel transform over these frequencies.
On Wed, Nov 2, 2011 at 2:25 AM, Marcus D. Leech
<address@hidden> wrote:
I am working on an application where i receive input at audio_sink and check for tone or data.
Data is FSK modulated at 1k and 3k whereas Tone is of 2k (i.e Tone lies in the middle).
I have written a flow graph which consists of two heirarichal flow graphs (tone_rx and data_rx).
Input is received at audio_sink and then forwarded to both sub-graphs.
My code works fine when tone is received but there is a problem when Data is received.
Because Data consists of FSK code and it has 2k components in it which also triggers Tone graph.
So i want to ask is there any GnuRadio Block by using which i can avoid triggering of tone while receiving Data
as i need to eliminate 2k component for Data but retain it when input it is Tone. OR
is there any such method by which we identify at the start whether it is data or tone.
i am using laptop sound card (not usrp).
function on the 2KHz channel. I'll leave the details up to you, but I'd basically have some logic that said "if energy at 1KHz and energy at 3KHz,
squelch the 2KHz tone channel."
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Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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