I'm bit confused here.
You said "In the OFDM example, watch the amplitude of the signal before it
enters the USRP sink. If it exceeds 1.0, I promise it will clip"
I transmitted OFDM symbols, keeping transmission amplitude as 0.2
Then, on the collected log, I ran gr_plot_ofdm.py tool. It shows th
Is this clipping behaviour specific to uhd_siggen? Earlier I have tried to
increase the amplitude of an OFDM subcarrier to more than 1.0 and saw linear
increase in received amplitude. Clipping took place at quite a high
amplitude.
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In uhd_siggen_gui tool, u cant set signal amplitude more than 1. Is there any
reason behind this?
I commented out the code where the limit checking is done. Then, when I
increase the amplitude of the transmitted signal beyond 1, I dont see any
change in amplitude of the recieved signal. What is th
Also I tried manually scaling down the output array in fft_vcc_fftw:work
function. That has no effect no IFFT output!
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Did you mean something like:
self.connect(self._pkt_input, 0), self.scale, (self.preambles,0)) ?
That's not working as it's giving itemsize mismatch error!
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Hi All,
I need to scale down the OFDM transmission signal in time domain, after IFFT
is done, so that, all the values are within the range -1 to 1. But, I cant
simply add one more "scaling" block after cp_adder in
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
(file: of
Thanks for the info. Can anybody please confirm whether the step size limit
of 0.5 dB is valid for USRP N200?
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Hello everyone,
Im trying to set the TX Gain of USRP device using the following command
while transmitting using uhd_siggen_gui tool:
./uhd_siggen_gui --sine -g -f 1013M --amplitude=1.0 -A TX/RX -v
If I set the TX_Gain to non integer or non 0.5 fractional values, it is
getting set to nearest in
