Comments (14)
ha7ilm
commented on June 15, 2024
There is an example with cat in the README.
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krishnaanand1896
commented on June 15, 2024
http://www.aaronscher.com/wireless_com_SDR/RTL_SDR_AM_spectrum_demod.html
Sir I have used the file specified in the link and the sampling rate is 2.5 Mhz .
cat FMcapture1.iq | ./rx 100122000 100300000 f > /mnt/d/ac.txt-This is the command used .But the output is noisy.
And one more doubt sir should we do decimation in two steps?If yes where is decimate_factor used after demodulation?
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ha7ilm
commented on June 15, 2024
You can watch the related talk and edit the code accordingly, if you need to change the filtering and decimation part. The code is very short, and in the talk it is explained how it works. For a more flexible command line tool, check out csdr.
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krishnaanand1896
commented on June 15, 2024
Thanks, I'll check it out.
…On Tue, 24 May 2022, 21:05 András Retzler, ***@***.***> wrote:
You can watch the related talk and edit the code accordingly, if you need
to change the filtering and decimation part. The code is very short, and in
the talk it is explained how it works. For a more flexible command line
tool, check out csdr.
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krishnaanand1896
commented on June 15, 2024
Respected Sir
I am sorry for disturbing you again.I have one more doubt uranium is a file
stored in your device or is it generated randomly?
I tried with my file its again full of noise.I am using audacity for
listening .
Thank you
On Tue, 24 May 2022, 22:17 Krishna Anand, ***@***.***>
wrote:
… Thanks, I'll check it out.
On Tue, 24 May 2022, 21:05 András Retzler, ***@***.***>
wrote:
> You can watch the related talk and edit the code accordingly, if you need
> to change the filtering and decimation part. The code is very short, and in
> the talk it is explained how it works. For a more flexible command line
> tool, check out csdr.
>
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> Reply to this email directly, view it on GitHub
> <#5 (comment)>, or
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ha7ilm
commented on June 15, 2024
You can use Wikipedia to know more about /dev/urandom. Uranium is a chemical element, not related to the project.
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krishnaanand1896
commented on June 15, 2024
Thanks for your response sir I was asking about urandom sir,typing error,
sorry for that
…On Wed, May 25, 2022 at 11:30 AM András Retzler ***@***.***> wrote:
You can use Wikipedia to know more about /dev/urandom. Uranium is a
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krishnaanand1896
commented on June 15, 2024
Respected Sir
One more clarification how do we select the amfm by and decimation
transition bw.
Thank you
On Wed, 25 May 2022, 11:33 Krishna Anand, ***@***.***>
wrote:
… Thanks for your response sir I was asking about urandom sir,typing error,
sorry for that
On Wed, May 25, 2022 at 11:30 AM András Retzler ***@***.***>
wrote:
> You can use Wikipedia to know more about /dev/urandom. Uranium is a
> chemical element, not related to the project.
>
> —
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krishnaanand1896
commented on June 15, 2024
Respected Sir
I tried with a downloaded file FMcapture1.dat with sampling frequency 2.5
mhz centre frequency 100.122 mhz and receiver frequency 100.3 mhz.
How to modify amfm bw and decimation transition bandwidth according to the
file.If you have tried with any file can you let me know which one is it.
Also your comment was to perform decimation in 2 steps,one before and one
after demodulation,after demodulation,where to use this decimation,
Waiting for your valuable respinse.
Thank you
On Wed, May 25, 2022 at 1:01 PM Krishna Anand ***@***.***>
wrote:
… Respected Sir
One more clarification how do we select the amfm by and decimation
transition bw.
Thank you
On Wed, 25 May 2022, 11:33 Krishna Anand, ***@***.***>
wrote:
> Thanks for your response sir I was asking about urandom sir,typing error,
> sorry for that
>
> On Wed, May 25, 2022 at 11:30 AM András Retzler ***@***.***>
> wrote:
>
>> You can use Wikipedia to know more about /dev/urandom. Uranium is a
>> chemical element, not related to the project.
>>
>> —
>> Reply to this email directly, view it on GitHub
>> <#5 (comment)>,
>> or unsubscribe
>> <https://github.com/notifications/unsubscribe-auth/AWIRBNCKJSSWIT5QX3HLAXTVLW6YRANCNFSM5WYY7U2Q>
>> .
>> You are receiving this because you authored the thread.Message ID:
>> ***@***.***>
>>
>
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krishnaanand1896
commented on June 15, 2024
Respected Sir
I have captured a signal using RTL SDR at the same frequency and sampling
rate and have done every step exactly the same as yours.But my output is
noise.
Kindly help me sir
On Wed, May 25, 2022 at 2:34 PM Krishna Anand ***@***.***>
wrote:
… Respected Sir
I tried with a downloaded file FMcapture1.dat with sampling frequency 2.5
mhz centre frequency 100.122 mhz and receiver frequency 100.3 mhz.
How to modify amfm bw and decimation transition bandwidth according to the
file.If you have tried with any file can you let me know which one is it.
Also your comment was to perform decimation in 2 steps,one before and one
after demodulation,after demodulation,where to use this decimation,
Waiting for your valuable respinse.
Thank you
On Wed, May 25, 2022 at 1:01 PM Krishna Anand ***@***.***>
wrote:
> Respected Sir
> One more clarification how do we select the amfm by and decimation
> transition bw.
> Thank you
>
> On Wed, 25 May 2022, 11:33 Krishna Anand, ***@***.***>
> wrote:
>
>> Thanks for your response sir I was asking about urandom sir,typing
>> error, sorry for that
>>
>> On Wed, May 25, 2022 at 11:30 AM András Retzler <
>> ***@***.***> wrote:
>>
>>> You can use Wikipedia to know more about /dev/urandom. Uranium is a
>>> chemical element, not related to the project.
>>>
>>> —
>>> Reply to this email directly, view it on GitHub
>>> <#5 (comment)>,
>>> or unsubscribe
>>> <https://github.com/notifications/unsubscribe-auth/AWIRBNCKJSSWIT5QX3HLAXTVLW6YRANCNFSM5WYY7U2Q>
>>> .
>>> You are receiving this because you authored the thread.Message ID:
>>> ***@***.***>
>>>
>>
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ha7ilm
commented on June 15, 2024
Sorry, I am unable to provide further support on this case, due to lack of time.
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krishnaanand1896
commented on June 15, 2024
Respected sir
Sorry sir ...Thanks for your reply..
Thank you
…On Fri, 27 May 2022, 16:24 András Retzler, ***@***.***> wrote:
Sorry, I am unable to provide further support on this case, due to lack of
time.
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krishnaanand1896
commented on June 15, 2024
Respected Sir
Thank you for your response.I have some more doubts.
Is it necessary to perform decimation in two steps?If yes where is
decimate_factor used after demodulation?
Thank you
Krishna Anand
…On Tue, 24 May 2022, 15:08 András Retzler, ***@***.***> wrote:
There is an example with cat in the README.
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ha7ilm
commented on June 15, 2024
Sorry, I am unable to provide further support on this case, due to lack of time.
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