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Re: Issue in file sink block


From: Maitry Raval
Subject: Re: Issue in file sink block
Date: Tue, 10 Nov 2020 17:04:03 +0530 (IST)

Hello,

Adding some more information to the previous mail,
that I want to use only receiver part from GNU radio and SDR and my transmitter is different from which I am transmitting modulated signal and received and demodulated using GNU radio. 
so, when I am doing simulation( using back to back blocks of constellation modulator with the demod blocks) I am receiving the 1100 and 1010 data same as transmitted. 
but , when I am using the receive only blocks and use external transmitter, then also received data changes.

I don't understand , where is the main problem. 

Kindly help.

With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com


From: "Maitry Raval" <maitry.raval@azistaaerospace.com>
To: "Cinaed Simson" <cinaed.simson@gmail.com>
Cc: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
Sent: Tuesday, November 10, 2020 9:13:38 AM
Subject: Re: Issue in file sink block

Hello,

I understand that I have use online ASCII to binary converter and for that I am using below online converter.
https://www.rapidtables.com/convert/number/ascii-to-binary.html

But I am facing an issue, while I am transmitting repetitive pattern such as 1100, 1010 , the data stored in the file after mod-demod is almost similar( only some initial bits are changed) . Please check the screenshot attached. 

But when I am transmitting some random pattern instead of repetitive using file source, I am not receiving the same pattern, while I am converting the stored ASCII to binary using converter. 

 I have sent the GRC file in previous mail. Kindly let me know, where is the problem?

Waiting for your positive response.

With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com


From: "Cinaed Simson" <cinaed.simson@gmail.com>
To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
Sent: Monday, November 9, 2020 1:15:51 PM
Subject: Re: Issue in file sink block

Hi Maitry - if by update you mean dumping a binary file as binary instead of hexadecimal, then on Linux  use

  xxd -b <infile> <outfile>

-- Cinaed


On 11/8/20 8:13 PM, Maitry Raval wrote:
Hello experts,

Any updates?

With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com


From: "Aditya Arun Kumar" <adityaarunkumarphi@gmail.com>
To: "Maitry Raval" <maitry.raval@azistaaerospace.com>
Cc: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
Sent: Wednesday, November 4, 2020 11:46:32 AM
Subject: Re: Issue in file sink block

Ok, thanks. 

On Wed, Nov 4, 2020 at 11:28 AM Maitry Raval <maitry.raval@azistaaerospace.com> wrote:
Hello,

Please ignore the previous grc file. please find attached the correct grc file.

With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com


From: "Maitry Raval" <maitry.raval@azistaaerospace.com>
To: "Aditya Arun Kumar" <adityaarunkumarphi@gmail.com>
Cc: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
Sent: Wednesday, November 4, 2020 9:06:09 AM
Subject: Re: Issue in file sink block

Hello, 

Please find attached grc file for reference. I have done trial and error by converting the output file into online ascii to binary converter, but it provides random output. 

Please guide which binary viewer I need to use in  check the data in 1 and 0 format(binary) ? 

With Best Regards,
Maitry Raval,
R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com


From: "Aditya Arun Kumar" <adityaarunkumarphi@gmail.com>
To: "Derek Kozel" <derek@bitstovolts.com>
Cc: "Maitry Raval" <maitry.raval@azistaaerospace.com>, "Marcus Müller" <mmueller@gnuradio.org>, "discuss-gnuradio" <discuss-gnuradio@gnu.org>
Sent: Tuesday, November 3, 2020 5:49:05 PM
Subject: Re: Issue in file sink block

Or maybe use a gr-baz any sink to view bits?

On Tue, Nov 3, 2020 at 5:43 PM Derek Kozel <derek@bitstovolts.com> wrote:
Hello Maitry,

The File Sink is not producing a text file, it is the raw binary data.
You need to look at the contents of the file using a binary viewer.

Regards,
Derek

On 03/11/2020 11:12, Maitry Raval wrote:
> Hello sir,
>
> Please find attached screenshot for the grc file same as given in PSK guided tutorials. also, I have attached output txt file for your reference. still , did not receive binary data stored via file sink.
>
> Please guide, where am I doing wrong.
>
>
> With Best Regards,
> Maitry Raval,
> R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com
>
> ----- Original Message -----
> From: "Marcus Müller" <mmueller@gnuradio.org>
> To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
> Sent: Monday, November 2, 2020 8:47:28 PM
> Subject: Re: Issue in file sink block
>
> Again, the file sink is fine.
>
> On 02.11.20 04:39, Maitry Raval wrote:
>> Hello,
>>
>> I understand, I think, I need to use PSK demod using below link.
>> https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
>>
>> But, as I have a requirement of storing the demod data in file , how is it possible using file sink or any other way, please guide.
>>
>> With Best Regards,
>> Maitry Raval,
>> R& D engineer|Azista Industries Pvt Ltd| 079-40605800|www.azistaaerospace.com
>>
>> ----- Original Message -----
>> From: "Marcus Müller, CEL" <mueller@kit.edu>
>> To: "discuss-gnuradio" <discuss-gnuradio@gnu.org>
>> Sent: Saturday, October 31, 2020 9:06:22 PM
>> Subject: Re: Issue in file sink block
>>
>> Hi Maitry,
>>
>> I doubt it's the file sink. That tutorial used DPSK Mod, and that's
>> among the buggy packet_encoder tooling that we deprecated a long time
>> ago, and finally banished two-ish years ago. It just dropped data.
>>
>> See the more modern packet examples that come with your GNU Radio 3.8.
>>
>> Cheers,
>> Marcus
>>
>> On 31.10.20 09:34, Maitry Raval wrote:
>>> Hello ,
>>>
>>> I am using GNU radio along with ADRV9361-Z7035 Board for data reception
>>> and demodulation. I have faced an issue of using file sink block along
>>> with QPSK demod blocks. when I am attaching dpsk/PSK demod block with
>>> file sink, I have not received data in binary format. it gives some
>>> trunk values. when I am doing wrong, please guide us.
>>> I have taken a reference of below link.
>>> https://courses.washington.edu/ee420/projects/lab2_gnuradio.pdf
>>>
>>> The only difference is that I am using receiving section only. as I am
>>> transmitting from other source. so I have attached fmcommsource block
>>> with dpsk demod followed by file sink.
>>>
>>> Please guide
>>>
>>> With Best Regards,
>>> Maitry Raval,
>>> R& D engineer|Azista Industries Pvt Ltd|
>>> 079-40605800|www.azistaaerospace.com
> >




--
S. Aditya Arun Kumar
Security Researcher, Comms
+919123517465



--
S. Aditya Arun Kumar
Security Researcher, Comms
+919123517465



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