Re: [Discuss-gnuradio] query regarding store transmitted signal

[Maitry Raval]

Hello,

there is a amplitude change in signal source and wav file sink(recorded wav 
file), please check the screenshots as well. I think, because of that when I 
use the recorded wav file as source for transmission, I didnot get the 
sucessful reception. Please guide how to record wav file with the same 
amplitude as signal source.

Thanks for your support in advance.


With Best Regards,
Maitry Raval,


----- Original Message -----
From: "Maitry Raval" <address@hidden>
To: "Marcus Müller, CEL" <address@hidden>
Cc: "discuss-gnuradio" <address@hidden>
Sent: Saturday, 18 May, 2019 08:29:16
Subject: Re: [Discuss-gnuradio] query regarding store transmitted signal

Hello,

Thanks for your reply.
I have successfully record one modulated signal transmitted from USRP into .txt 
file and done demodulation offline, i.e of that stored data and receive audio 
from that.
But, I have all this done with wav file which is 48k sampled. but my 
requiremnet is to do AM modulation of 600Hz audio file. for that, I have done 
the following.

signal source(600Hz,8K)- wav file sink

AM transmission of this wav file from USRP.

record AM modulated transmitted signal in .txt file.

and demodulate it in order to receive 600Hz, 8k wav file. during demodulation, 
I saw signal in scope sink and figure out frequency of that signal through FFT 
sink, biut when I record received 600Hz signal as wav file through wav file 
sink, then, that wav file's scope is blank, I get blank wva file, when am I 
doing wrong. I think, at transmitter side, amplitude of my original wav file 
source's amplitude is too low.
PLease guide.


With Best Regards,
Maitry Raval,

----- Original Message -----
From: "Marcus Müller, CEL" <address@hidden>
To: "maitry raval" <address@hidden>
Cc: "discuss-gnuradio" <address@hidden>
Sent: Friday, 17 May, 2019 11:57:45
Subject: Re: [Discuss-gnuradio] query regarding store transmitted signal

https://wiki.gnuradio.org/index.php/FAQ#What_is_the_file_format_of_a_file_sink.3F_How_can_I_read_files_produced_by_a_file_sink.3F
On Fri, 2019-05-17 at 17:06 +0530, Maitry Raval wrote:
> Hello,
> 
> Thanks for your reply.
> 
> I.e It is possible to store the transmitted modulated signal (for ex AM 
> modulated signal) through USRP as per below, 
> USRP source - file sink. but in which format, this data can be stored? (.txt, 
> .pdf)_ I have seen.DAT file in one of the example,but when I tried , it does 
> not give proper output.
> 
> Actually, my requirement is to receive the modulated signal through USRP 
> source, store it in a file. and later, I can be able to do demodulation 
> offline from that particular stored data. it will be grateful, if you provide 
> guidance.
> 
> 
> With Best Regards,
> Maitry Raval,
> 
> ----- Original Message -----
> From: "Marcus Müller, CEL" <address@hidden>
> To: "discuss-gnuradio" <address@hidden>, "maitry raval" <address@hidden>
> Sent: Friday, 17 May, 2019 10:50:00
> Subject: Re: [Discuss-gnuradio] query regarding store transmitted signal
> 
> Hi Maitry,
> 
> sorry, we have no idea what lab you're referring to! However, yes, that
> sounds exactly what File Sinks are meant to do.
> 
> Best regards,
> Marcus
> 
> On Fri, 2019-05-17 at 12:01 +0530, Maitry Raval wrote:
> > Hello,
> > 
> > I want to store the modulated transmitted signal through USRP such as given 
> > in lab -3 receiving AM signal and store it as .DAT file. Is it possible to 
> > store transmitted signal as .DAT file through USRP source and file sink? 
> > and use that stored data from file source to do demodulation.
> > thanks for your support in advance.
> > 
> > 
> > With Best Regards,
> > Maitry Raval,
> > 
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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original_signal_.png
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