RE: [Discuss-gnuradio] Question regarding matched filter outputs

[Shucai Xiao]

If I am correct, it should be in the file dbpsk.py, and the module is
Self.slicer = gr.constellation_decoder_cb(retated_const, range(arity))

Shucai



-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of Dumezie
Maduike
Sent: 2008年9月23日 14:37
To: 'Brian Padalino'
Cc: address@hidden
Subject: RE: [Discuss-gnuradio] Question regarding matched filter outputs

I'm sorry if I wasn't clear in my question.  After a packet is transmitted
from one USRP to the next using BPSK, the analog signal that gets to the
receiving USRP, it needs to be converted to binary 1's and 0's based on a
threshold which is usually 0V in BPSK.  I wanted to know which file (either
.py or .cpp) handles that received analog signal before it is converted to
binary 1's and 0's.  I tried to trace it from benchmark_tx.py to
benchmark_rx.py and I wasn't able to locate it.

I hope this clarifies it.

Thanks in advance

Dumezie

-----Original Message-----
From: Brian Padalino [mailto:address@hidden 
Sent: Monday, September 22, 2008 3:55 PM
To: Maduike, Dumezie
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Question regarding matched filter outputs

On Mon, Sep 22, 2008 at 4:44 PM, Maduike, Dumezie <address@hidden>
wrote:
> Hello all,
>
> Does anyone know where in the GNU Radio code to find the output of the
matched filters after a signal is transmitted using a modulation scheme such
as BPSK?

I don't understand the question.  Are you just referring to the output
of a, lets say, RRC filter before transmission?  If so, you can tap
off at any point in the signal chain.  If not - can you be more clear
with your question?

Brian



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