Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [usrp]

25 questions
9
votes
1 answer

Large spike at the center frequency when using Ettus X310

I am using the Ettus X310 SDR and GNU radio. On the GNU radio schema I have a standard UHD USRP source block connected to a GUI FFT sink - basically I'm just displaying the spectrum of the raw signal from the device. Parameters for the USRP source…
Tihomir Meščić
  • 193
  • 1
  • 4
3
votes
2 answers

Could 2 synchronised RX chains be used to receive a signal too wide for just one of them?

Say the goal is to demodulate a "wide" signal, e.g. 300 MHz wide. An SDR is available with a maximum RX bandwidth of 150 MHz (ADC sampling freq. limitation), but it comes with 2 RX channels sharing the same clock source. The proposed approach is…
Tomislav Nakic-Alfirevic
  • 103
  • 8
2
votes
0 answers

Having trouble transmitting/receiving a BPSK signal using two USRPs

I am relatively new to working with SDRs and GNURadio and I am attempting to generate a BPSK signal and transmit it through one USRP and receive and demodulate it on another USRP. I am using GNURadio and I am transmitting from an E310 to an N210…
Eric Gaulke
  • 21
  • 1
1
vote
1 answer

Periodic Jumps in received signal

I am doing some preliminary tests to check the behaviour of two USRPs. The setup is simply an USRP B210 connected via cable to a N310. The B210 is sending a constant 1 at 2,48 GHz, the N310 is just receiving and saving the data to a file, both USRPs…
Michaelzen
  • 11
  • 2
1
vote
1 answer

Confusion about the frequency of a signal recorded with a USRP

In my assignment I am provided with a recording of a radio signal that was supposedly done in the AM spectrum with a USRP, and I am told to process it in various ways with GNURadio. However, the assignment makes a statement about the recorded signal…
Cosinux
  • 13
  • 3
1
vote
1 answer

Calculating transmitter power from spectral density

I want to find out what is the real transmit power of my USRP 2922, unfortunately the only results I get when looking at the spectrum analyzer is the spectral power density. These are the results of the my measurements (in LabView - transmitter…
MagicMan
  • 83
  • 6
1
vote
1 answer

Best way to resample an OFDM signal without interpolating + filtering?

I am working on a custom transceiver with a sampling rate of 3.84 MHz (256 OFDM subcarriers at 15 kHz, although 56 subcarriers are null). I would like to resample the signal to 5 MHz, in order to use a pair of USRPs N210 to communicate each other,…
David
  • 11
  • 1
1
vote
0 answers

USRP + GNU Radio as 1 GHz bandwidth spectrum analyzer

I have maybe not trivial but some interesting question. I need to create 802.11ac channels spectrum analyzer with USRP. Hardware: USRP B210 Software: GNU Radio 3.7.9 PC: Intel Core i3 i3210m 16 GB RAM. According to documentation from:…
user34533
  • 11
  • 1
  • 2
0
votes
0 answers

How do I set GNU Radio Es/No?

I am trying to create a random signal in GNU Radio (using DVB-S2 specs for the physical layer) and transmit this signal using a USRP X310. This is shown below: Problem: I would like to be able to control the Es/No of this signal, as well as the…
Matthew Hilts
  • 1
  • 1
0
votes
0 answers

time division duplexing (TDD) with USRP B2xx

I am going to implement a real-time TDD link (in the order of one-millisecond burst durations) using two laptops and two USRP B2xx (in either single antenna or dual-antenna ways). I searched a lot on the net especially GNU Radio's mailing list but…
Ali
  • 75
  • 6
0
votes
0 answers

GNU Radio and USRP audio source problem

I have a modem which accepts a voice in GNU Radio, digitizes and compresses it (codec2) and transmits it using USRP on one laptop and receives it on another laptop. When I use "Wave File Source" in the transmitter everything is OK and I clearly…
Ali
  • 75
  • 6
0
votes
1 answer

Undersampling in GNU Radio

I'd like to implement a FHSS receiver in GNU Radio, using a USRP B210. The total bandwidth of the signal is about 30 MHz, with each message having a bandwidth of about 200kHz. When I attempt to sample the signal to account for the full 30MHz…
George Willis
  • 3
  • 1
0
votes
1 answer

GNU Radio, Frequency Hopping Spread Spectrum for High Hopping Intervals

I am planning to implement a frequency hopping spread spectrum transmitter and receiver in GNU Radio. In my project, the bandwidth of the message signal is around 200 kHz and the maximum frequency hopping interval is around 80 MHz. On the other…
Okan Erturk
  • 320
  • 1
  • 7
0
votes
0 answers

Doubt about sampling rate and spectrum with USRP and gnuradio

I have started working recently with software defined radio (SDR) as well as gnuradio. I have worked with digital signal processing for a while and one feature at one tutorial, which I saw for calculating the spectrum from a bandpass signal,…
LSL
  • 1
0
votes
2 answers

Can I create my IF signal on SDR before bringing data to PC?

I'm relatively new to SDR's and I'm trying to determine what sort of BW I need for my laptop to get the best resolution possible for an FMCW system. I have an X310 Ettus with a UBX160 daughtercard which should give about 1 meter of resolution…
kit_traverse
  • 15
  • 2
1
2