Hi all:
Thanks in advance.
Example:gnuradio/gr-digital/examples/ofdm/rx_ofdm.grc.
If I set the sample rate of usrp equal to 1Msps,then what is the
sample rate of the output of the FFT block?Thank you very much.
Best regards,
xd
___
I have been playing with a number of the examples - FM NB and WB
receivers, AM receiver, etc.
The sample rate appears to default to 64 MSPS, but I have been unable
to find where that default rate is set.
Where is it defined? Can it be changed from the examples themselves?
For example, 64MPS
The question is ill-formed, the concept of a 'sampling rate' does not
really apply here.
However, to an item rate, you can do the math yourself:
Assume N is the FFT length, and CP the length of cyclic prefix in
samples. r is the incoming sampling rate.
First, data goes through the HPD, which tak
Hi Martin:
Thank you so much.I understand.
Best regards,
xd
At 2014-10-06 17:11:18, "Martin Braun" wrote:
>The question is ill-formed, the concept of a 'sampling rate' does not
>really apply here.
>
>However, to an item rate, you can do the math yourself:
>
>Assume N is the
Hi Martin:
Thanks.But I'm confused about it.
First, data goes through the HPD, which takes out the CP. The
outgoing rate of that block is thus
r2 = (N+CP)/N * r
Now r2>r.But according to the downsampling,when the sample become
less than before
Obviously I flipped the fraction. It's N/(N+CP).
M
On 10/06/2014 11:29 AM, xianda wrote:
>
> Hi Martin:
>Thanks.But I'm confused about it.
>
> First, data goes through the HPD, which takes out the CP. The
> outgoing rate of that block is thus
> r2 = (N+C
Hi Martin:
Thanks.
If I add a block(Vector to Stream) after FFT block.Then the
sample rate become r4=r3*N.
Am I right?Thank you very much.
Best regards,
xd
At 2014-10-06 21:38:54, "Martin Braun" wrote:
>Obviously I flipped the fraction. It's N/
On Mon, Jan 28, 2008 at 09:43:13AM -0600, Richard Jaeger wrote:
> I have been playing with a number of the examples - FM NB and WB receivers,
> AM receiver, etc.
> The sample rate appears to default to 64 MSPS, but I have been unable to
> find where that default rate is set.
> Where is it defined
On Jan 28, 2008 10:43 AM, Richard Jaeger <[EMAIL PROTECTED]> wrote:
> I have been playing with a number of the examples - FM NB and WB
> receivers, AM receiver, etc.
> The sample rate appears to default to 64 MSPS, but I have been unable
> to find where that default rate is set.
> Where is it defin
On Mon, Jan 28, 2008 at 02:42:33PM -0600, Richard Jaeger wrote:
> On Jan 28, 2008, at 1:32 PM, Eric Blossom wrote:
>
>> On Mon, Jan 28, 2008 at 09:43:13AM -0600, Richard Jaeger wrote:
>>> I have been playing with a number of the examples - FM NB and WB
>>> receivers,
>>> AM receiver, etc.
>>> The
Hi guys,
Q1: When using USRP source_c (complex) with decimation == 8, am I
getting 4 million complex samples per second? 64Mhz / 8 = 8MHz floats =
4MHz complex
Q2: If I saved that data to a file and shared it with people, would I
advertise it as "Complex data, 4 million samples per second"
Hello everyone
I didnt try it yet, but as I see Ettus B210 has got 61 MS/sec and 6 GHz
upper frequency limit.
If I want to generate Sinusoid for 6 GHz, I need a 12Giga Sample Rate
(Nyquist theorem) ?! Propably not, as I think.
Thank You
Przemek Lewandowski
I am confused about the sample rate in GRC...if i am RXing a signal by USRP
B210 at 2.4 GHz then the sample rate should be 4.8GHz??But USRP B210 uses a
direct conversion RX and shifts the signal to 0Hz,so what should be the
criteria for setting the sample rate?
Another option could be ton set it do
Chris Stankevitz wrote:
> Q1: When using USRP source_c (complex) with decimation == 8, am I
> getting 4 million complex samples per second? 64Mhz / 8 = 8MHz floats
> = 4MHz complex
No.
64 MS/s complex samples / 8 = 8 MS/s complex
>
> Q2: If I saved that data to a file and shared it with people
Also, gr.file_sink stores data native-Endian, so you may want to include
the Endian-ness in the description.
-Dan
Matt Ettus wrote:
> Chris Stankevitz wrote:
>
>> Q1: When using USRP source_c (complex) with decimation == 8, am I
>> getting 4 million complex samples per second? 64Mhz / 8 = 8MH
Matt Ettus wrote:
Q1: When using USRP source_c (complex) with decimation == 8, am I
>
> 64 MS/s complex samples / 8 = 8 MS/s complex
Okay. That's certainly easy to remember. Does float act the same way?
I was under the impression you sacrifice something (samples per
second) when you move
Chris Stankevitz wrote:
>
>
> Matt Ettus wrote:
>>> Q1: When using USRP source_c (complex) with decimation == 8, am I
> >
> > 64 MS/s complex samples / 8 = 8 MS/s complex
>
> Okay. That's certainly easy to remember. Does float act the same
> way? I was under the impression you sacrifice somethin
Hi Przemek,
the USRPs are all up/downconverting transmitters/receivers:
You digitally provide them with a complex baseband signal, which they
convert to an analog I / Q signal, and use quadrature mixing with a
synthesized LO to shift the signal in frequency domain to that LO's
frequency (TX).
In R
If you want 1e6 Hz (1MHz) of receive bandwidth at a center frequency of
2.4e9 Hz (2.4GHz) then you just set the center frequency to 2.4e9 and
sample rate to 1e6 in the UHD source block in GRC.
Mike
On Tue, May 13, 2014 at 10:04 AM, jason sam wrote:
> I am confused about the sample rate in GRC..
This is probably embarrassingly simple but I can't seem to find the answer
anywhere. I just recorded a signal to a file sink with a sample rate of
100k. I go to use that file as a source with a throttle set to 100k and it
seems to playback at approximately 1/10 the speed. When I step up the
throttl
Hello all,
Following with my previous email regarding the sample_rate block,
> Hello all,
> I am new to GNU radio and I have one basic query.
>
> Suppose I am having 10 samples and I set sample rate at 20MHz with
> repeat option ON (assuming my hardware supports this bandwidth).
> Is that means m
Hello,
When you specify a signal_source, you have to set up the sample rate.
But with the noise and vector sources you do not have to specify this
parameter.
What is the sample rate in the computer -> USB when we generate a noise
or generate data from a list/file?
Thanks
_
Hi Jesse,
this is not embarassingly simple!
So, the point is that GNU Radio is really totally agnostic when it comes
to sampling rates. For all the blocks, sample streams are really nothing
but a sequence of numbers. Whether the signal was physically sampled at
1MS/s or 1S/s doesn't matter; the on
Thank you Marcus and Ed. I finally had a chance to look back at my GRC
flowgraph. Same data types in and out (complex for all blocks). And since I
have been trying to figure this out for awhile, I've taken away all other
blocks other than RTL-SDR Source -> File Sink and then File Sink ->
throttle -
Hello all,
I am new to GNU radio and I have one basic query.
Suppose I am having 10 samples and I set sample rate at 20MHz with repeat
option ON (assuming my hardware supports this bandwidth).
Is that means my samples first gets repeated 20M samples and gets
transmitted at once?
--
-Regards
Ab
Hi Abhilash,
is this question related to the email you've replied to? If not, please
don't use the "reply" functionality in your mail client.
In any case, your question is sadly pretty unclear; "repeat option" of
/what/?
Best regards,
Marcus
On 09/27/2017 09:46 PM, abhilash b wrote:
> Hello a
Hello Abhilash B:
The 10 samples will keep get repeated, until you manually stop the program
(they will be transmitted over again and again without a pause, until you
stop the program). The 20MHz sampling rate will determine the output speed
(DAC samp rate) of your SDR - assuming that the sampling
On Thu, Oct 26, 2006 at 05:33:26PM +0200, De Lima Julian wrote:
> Hello,
>
> When you specify a signal_source, you have to set up the sample rate.
This is just for convenience and allows you to specify the output
frequency in absolute instead of normalized terms. If you prefer, you
can of course
ailto:[EMAIL PROTECTED]
Envoyé : jeudi, 26. octobre 2006 15:36
À : De Lima Julian
Cc : discuss-gnuradio@gnu.org
Objet : Re: [Discuss-gnuradio] Sample rate for source_noise and source_vector
On Thu, Oct 26, 2006 at 05:33:26PM +0200, De Lima Julian wrote:
> Hello,
>
> When you specify a sign
I/Q format?
Thanks
Julian De Lima
-Message d'origine-
De : Eric Blossom [mailto:[EMAIL PROTECTED]
Envoyé : jeudi, 26. octobre 2006 15:36
À : De Lima Julian
Cc : discuss-gnuradio@gnu.org
Objet : Re: [Discuss-gnuradio] Sample rate for source_noise and source_vector
On Thu, Oct 26, 2006
On Fri, Oct 27, 2006 at 09:23:19PM +0200, De Lima Julian wrote:
> So I tested but I have another question.
> I read that the data through the USB cable (from computer to USRP) are in the
> format I/Q complex. (Dawei Shen tutorial)
>
> My interpolation factor is 512, so the sample rate is 128M/512
Hi dear all
I set my USRP N210 clock to "external clock", which is a 10MHz signal from
GPS.
I am wondering that can I set sample rate greater than 10Mhz? Like 25Mhz?
I am afraid that if I set sample rate over than 10Mhz, USRP N210 will switch
to internal clock automatically.
Thank you for your r
I'm currently confronted with a sample rate vs. symbol time issue.
I noticed that the E100 announcement mentioned a "flexible clocking" feature to
deal with exactly this type of thing. I've been looking on the Ettus site for
more information, but haven't been able to locate any.
Is there any m
On 11/29/2010 01:00 PM, bob beckwith wrote:
I'm currently confronted with a sample rate vs. symbol time issue.
I noticed that the E100 announcement mentioned a "flexible clocking"
feature to deal with exactly this type of thing. I've been looking on
the Ettus site for more information, but haven
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