Failure to receive the correct Preamble

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bravehamid

New Member

• May 11, 2020

• #1

HI
I'm using a USRP to receive a signal on the 900 MHz frequency band, but the signal received after demodulation has no preamble. Does anyone know what the cause is?
transmitter information:
Baud rate=10K
modulation = BFSK
deviation = 100K
channel spacing = 350K

 

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Pommie

Well-Known Member

Most Helpful Member

• May 11, 2020

• #2

You may think you've given us all the information required but I've no idea what USRP means. Also, no preamble, no data too?

Mike.

 

be80be

Well-Known Member

• May 14, 2020

• #3

USRP is a costly SDR radio



There are some cheaper in the $1000 to $2000 range.

 

Last edited: May 14, 2020

ronsimpson

Well-Known Member

Most Helpful Member

• May 16, 2020

• #4

In collage, this is what girls said to me before they walked off "Failure to receive the correct Preamble".

 

unclejed613

Well-Known Member

Most Helpful Member

• May 20, 2020

• #5

there's

bravehamid said:

transmitter information:
Baud rate=10K
modulation = BFSK
deviation = 100K
channel spacing = 350K

Click to expand...

ok, that's what you need to demodulate the signal, but once that is done, what is the protocol the transmitter is using? this is where sync/preamble/header and data format are defined...