lan
I have done some research work. The input values of uhd should be -1=x1,
and the gr_multiply_const_ff block has set the default amplitude to 1, so
this block seems useless.
The only way I found to scale the power of signal we transmit is to enhance
the gain of usrp_sink. However, we use
Tom,
Value of the signal after the multiply_const block is amplitude,
We set the amplitude as much as 5000 to increase the transmit power of
signal is an advice from the developer of gen2_reader project Michael
Buettner, so it would be ok.
You said that the UHD transmitter takes signal samples
On 12/01/2013 09:24 PM, atools_cook wrote:
Tom,
Value of the signal after the multiply_const block is amplitude,
We set the amplitude as much as 5000 to increase the transmit power of
signal is an advice from the developer of gen2_reader project Michael
Buettner, so it would be ok.
You said
Marcus，
Thanks for your advice and we do use the very old code exactly.
Would you please elaborate the backing things off things because I can't
your point of it.
Best
Lee
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Lee,
What Marcus and Tom are telling you is that when a signal reaches a USRP Sink
in GNURadio it is transformed into an integer representation that is weighted
so that the integers represent values -1 = x 1.
Input values with magnitudes larger than these will be saturated to these
limits,
Hi Marcus,
Thanks for your attention.
I have upload a bigger size image below. the x axis is sampling point which
reflects time and the y axis is margin which reflects the power.
I plot the image from the rx block of the gen2_reader project. The signal is
transmitted by the tx block of
On Sat, Nov 30, 2013 at 5:00 AM, atools_cook liwenpux...@gmail.com wrote:
Hi Marcus,
Thanks for your attention.
I have upload a bigger size image below. the x axis is sampling point which
reflects time and the y axis is margin which reflects the power.
I plot the image from the rx block of
Hi all,
I'm working on the gen2_reader project and got some trouble with the amp
block. We use the gr_multiply_const_ff to amplify the power of signal.
amp = gr.multiply_const_ff(amplitude)
tx = uhd.usrp_sink(options.args,uhd.io_type.COMPLEX_FLOAT32,
num_channels=1,)
Hi Lee,
I don't quite understand what these images show, and they're too small
to read the axes.
Could you elaborate on where you take them from? Is the input data the same?
Whitout guarantee, I'd assume that multiply_const_ff works quite well,
and that the problem is somewhere else.
What
