On Wed, Jun 9, 2010 at 8:27 PM, Roberto de Matos wrote:
> Hello,
>
> The maximum sampling window of USRP2's ADC is 50MHz or 100MHz?
> Because of Nyquist Theorem the straight answer is 50MHz, once the ADC runs at
> 100MHz. However if we use the complex samples (quadrature sampling) the
> answer i
Hi John, Thanks for the message sorry for using MATLAB notation without
clarification 2:12 = from 2 upto 12.
To simplify the case, I wrote the following code that actually carry the same
problem concept:
***
Hello,
The maximum sampling window of USRP2's ADC is 50MHz or 100MHz?
Because of Nyquist Theorem the straight answer is 50MHz, once the ADC runs at
100MHz. However if we use the complex samples (quadrature sampling) the answer
is 100MHz.
So, which is right??
Thank you,
Roberto de Matos
__
Tom,
I only need a single sample from each stream to generate the vector ( there
is a method of doing this in signal processing) and I am inherting from
gr_sync_block as the block is 1:1. I am also returning noutput_items and
didn't use consume_each() of course. Thanks anyway.
Still thinking :)
On Wed, Jun 9, 2010 at 5:37 PM, Sammour wrote:
>
> HI Eric,
>
> Thanks for replying. My block has N=2:12 complex input streams and one
> complex vector output stream of length N^2 (represents a reshaped NxN
> matrix). The block basically is meant to calculate the covariance matrix
> using a MATLAB
HI Eric,
Thanks for replying. My block has N=2:12 complex input streams and one
complex vector output stream of length N^2 (represents a reshaped NxN
matrix). The block basically is meant to calculate the covariance matrix
using a MATLAB library.
The signatures are:
input: gr_make_io_signature (
On Wed, Jun 09, 2010 at 03:40:07AM -0700, Sammour wrote:
>
> Dear all,
>
> I'm writing a block that outputs a vector of complex number inheriting from
> gr_sync_block. In my code I wrote:
> gr_complex *out =(gr_complex *) output_items[0];
> gr_complex out_vector [N*N];
>
> where out_
On Wed, Jun 09, 2010 at 11:57:24AM +0100, Zohair M. Abu Shaban wrote:
>
> Hi Eric,
>
> I have read what you recommended but still haven't understood what
> the significance of this number is. I have another block that
> generates a vector of 4 elements and the noutput_items is almost 1/4
> the nu
Thanks again Martin.
I believe the problem is not in the algorithm as I actually tested it and
can print the output of it on the screen as you suggested (I mean "out" in
my original post). Everything excellent at this stage. However, the problem
is that the block in GRC doesn't generate output.
On Wed, Jun 09, 2010 at 06:06:01AM -0700, Sammour wrote:
> Thanks for replying. N is designed to be 2:12.
> The block uses a number of inputs (N) to update a matrix that I am sending
> to the output as a vector that will be reshaped in the next block when it
> is used. Do you think that my progra
To isolate the problem, I removed all the complex code and wrote the
following in work() to generate a vector of random numbers:
gr_complex *out =(gr_complex *) output_items[0];
unsigned int index = 0;
for (unsigned int m =1; m<=4; m++)
{
*(out+inde
On 06/09/2010 12:12 AM, Andrew Gilbett wrote:
Hi,
When I ask my RFX400 to tune a frequency for example 438.600MHz I get
the following output.
A: Flex 400 Tx MIMO B
r.baseband_frequency = 44200.0
r.dxc_frequency = -340.0
r.residual_frequency = -0.381469726562
Dear Martin,
Thanks for replying. N is designed to be 2:12.
The block uses a number of inputs (N) to update a matrix that I am sending
to the output as a vector that will be reshaped in the next block when it
is used. Do you think that my programme takes much time to execute?
Cheers,
Sam
--
On Wed, Jun 09, 2010 at 03:40:07AM -0700, Sammour wrote:
> Dear all,
>
> I'm writing a block that outputs a vector of complex number inheriting from
> gr_sync_block. In my code I wrote:
> gr_complex *out =(gr_complex *) output_items[0];
> gr_complex out_vector [N*N];
>
> where out_vec
On Wed, 2010-06-09 at 07:09 -0400, Johnathan Corgan wrote:
> On Wed, Jun 9, 2010 at 07:07, Martin DvH wrote:
>
> > The gnuradio.org server seems to be down. (9 Jun 2010)
>
> Works for me here. Might be a routing issue for you, try seeing where
> traceroute fails.
It seems that tinet is having p
On Wed, Jun 9, 2010 at 6:07 AM, Martin DvH wrote:
> The gnuradio.org server seems to be down. (9 Jun 2010)
>
> Even a ping times out.
Hmm...works for me in the US (Illinois).
--
John Orlando
CEO/System Architect
Epiq Solutions
www.epiq-solutions.com
Well, it seems to be working here!
Martin Dvh wrote:
>
> The gnuradio.org server seems to be down. (9 Jun 2010)
>
> Even a ping times out.
>
>
> Martin
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> http://lists.gnu.org/ma
The gnuradio.org server seems to be down. (9 Jun 2010)
Even a ping times out.
Martin
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Hi Eric,
I have read what you recommended but still haven't understood what the
significance of this number is. I have another block that generates a vector
of 4 elements and the noutput_items is almost 1/4 the number of first block.
Any further help please?
Thanks again,
Zohair
> Date:
Dear all,
I'm writing a block that outputs a vector of complex number inheriting from
gr_sync_block. In my code I wrote:
gr_complex *out =(gr_complex *) output_items[0];
gr_complex out_vector [N*N];
where out_vector is the array where the actual output values are stored. I
copied
Hi,
I'm having the same problem: the output of my spectrum analyzer and the
output of the spectrum_sense.py doesn't match. I'm trying to detect activity
int the GSM900 band, but it's impossible with the outputs I obtain.
I was trying to correct the code and I think that your formula is
incorr
Hi,
When I ask my RFX400 to tune a frequency for example 438.600MHz I get
the following output.
A: Flex 400 Tx MIMO B
r.baseband_frequency = 44200.0
r.dxc_frequency = -340.0
r.residual_frequency = -0.381469726562
r.inverted = False
This means that the synthesi
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