Hello,
I am trying to create an ook modulation and demodulation block. So far, I
have created a block similar to the bpsk block. I changed my constellations
points to 1+0j and 0+0j. I want a rectangular pulse to be transmitted for a
1 and nothing for 0. I was told I could do this by changing the
r
Hello,
I was wondering if there is any way to control the rate at which the bits
are transmitted from my USRP in GRC? I tried using different blocks but the
rate seems to stay the same. Thank you for your time and help.
Sam
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Hello,
I am working on creating a OOK Modulation block. I have created a block
using the bpsk.py file as an example. I changed the constellation points
such that 1+0j and 0+0j. I am now trying to change the waveform that is
outputted from the USRP. I would like to transmit a square wave for 1 and
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Hello,
I am trying call the read_gpio() function from the dboard_iface class in a
c++ program that I have written. I have studied the .cpp files located in
the host/examples directory in order to accomplish this. In these examples,
they call uhd::usrp::multi_usrp::sptr usrp =
uhd::usrp::multi_usr
Hello,
I am working on a program that continuously reads pins io_rx[0-15] on the
basic_rx board (I am using USRP N210). I am able to read the pins using the
read_gpio() function, but after a couple seconds I get the following error.
RuntimeError: RuntimeError: fifo ctrl timed out looking for ack
Hello,
I am trying to work with the read_gpio() function that is found in the
dboard_iface.cpp file. I am trying to read the io_rx[15 - 0] pins on the
basic_rx daughterboard. I am able to read the pins using this function one
time, but I am unable to continuously read the pins. Could anyone give
Hello,
I would like to control the io_rx[15 - 0] pins on the basic_rx
daugtherboard. I am able to set them as either input or output pins by using
the set_pin_ctrl() function. I would like to input a signal into one of
these pins and be able to read the value. I have been reading the different
da
Hello,
I am trying to create an OOK modulation and demodulation block. I want to
represent a 1 with a pulse (a square pulse) and 0 as nothing. Would
something like this be possible? I have tried modifying the bpsk.py file so
that I have constellation points of (1 +0j) and (0 + 0j). This gives me
Hello,
I have recently been working on an OOK modulation and demodulation block. I
am using GNU Radio 3.6.1. I achieved the OOK modulation by modifying the
digital_constellation.cc file and changing the constellation points to
(1+0j) and (0+0j). The modulation part works well, but I am having tro
Hello,
I am unsure of how to set the CONSTELLATION OBJECT parameter in the GRC
block. I am using GNU Radio 3.6.1. I would greatly appreciate any help.
Thank you.
Sam
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Hello,
I would like to be able to control pins 5, 7, 9,... , and 35 on the J401
component on the N210 (Pins G4, F5, H6, ..., and K6 on the FPGA). From the
Basic_Tx/Rx daughterbaord schematic, I was able to see that some of these
pins are not really used on the daughterboard. I am working on imple
Hello
I am trying to modify some of the .cpp files within the uhd folder. I
understand that in order to build the .cc file you have to make and make
install. Would these same commands work for the .cpp files? I would greatly
appreciate any help.
Sam
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Hello,
I have been trying to modify certain parts of the digital_constellation.cc
file, but I am unable to see the changes that I make. I have made changes to
the bpsk section of this file. I am making the d_constellation[0] variable
equal to gr_complex(1,0). I am trying to see my result by print
Hello,
I am trying to modify one of the C++, but I am unsure of how I am suppose to
do this. I understand that I need to compile the file after I have modified
it. I have tried compiling the file, but I always get an error saying the .h
file is not found. I am not sure what I am doing wrong. I wo
Hello
I am currently working on the USRP N210. I am trying to modify the VHDL code
for the FPGA in order to gain acccess to some of the unused pins. I am
unsure of how to do this, and I was wondering if anyone had any advice on
how to do this. I would greatly appreciate any help. Thank you.
Sam
Hello
I am working with the different digital modulators in grc, and I am having
trouble understanding some of the parameters. I don't understand the effect
that the samples/symbol or bits/symbol has on the sampling rate. I would
greatly appreciate any help or advice. Thank you for your time.
Sa
Hello,
I continue to have overflow problems while using benchmark_rx. I used a
newer computer (one year old) with a i7 core processor and 4 GB of RAM. I
also installed Ubuntu 10.0.4 which is 32-bit system on my computer. I tried
reducing the bitrate in order to reduce the data that it is receivin
Hello,
I am attempting to modify the bpsk.py file in order to obtain OOK
modulation. I would like to change my constellation points to 1+0i and 0+0i.
I understand that the digital_costellation.cc file is being used to set
these parameters. I have tried to modify the digitial_constellation.cc file
> Ben
>
> On Fri, Apr 6, 2012 at 1:39 PM, sibar002 wrote:
>
>>
>> Hello,
>>
>> I am using USRP 1 with the XCVR2450 daughterboard. I am also using Ubuntu
>> 10.0.4 with gnuradio-3.5.1. I have tried running benchmark_tx/rx with the
>>
Hello,
I am using USRP 1 with the XCVR2450 daughterboard. I am also using Ubuntu
10.0.4 with gnuradio-3.5.1. I have tried running benchmark_tx/rx with the
following parameters:
./benchmark_tx.py -f 2.45G -A J1 --spec B:0
./benchmark_rx.py -f 2.45G -A J1 --spec B:0
I am not consistently able to
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