Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [gnuradio]

6 questions
2
votes
0 answers

Constellation of BPSK doesn't look as expected

I'm a total novice when it comes to RF beyond basic concepts. I'm trying to use a HackRF One to pull the data coming off of this transponder, which theoretically transmits data on a 3.59MHz carrier. I've followed some tutorials on BPSK demodulation,…
Drewster
  • 483
  • 3
  • 10
0
votes
0 answers

Alternative to "Header/Payload Demux" block in GNU Radio for OFDM frames with a fixed length

I'm fairly new to GNU Radio and was looking for a way to communicate using OFDM without using packet headers. I am trying to implement a simple version of OFDM with fixed length frames. I have currently implemented a simple loop-back example without…
MattyK
  • 21
  • 1
0
votes
1 answer

Phase detection accuracy with USRP N210 and CBX-40

I have designed a simple TX/RX system in GRC with a single USRP N210 and CBX-40. I am transmitting sinusoidal signals at various frequencies within the 2-6GHz range and detecting the amplitude and phase of the received signals at each frequency when…
Fati
  • 1
0
votes
1 answer

GNU radio FRS transceiver

I am trying to implement the transmit section of this GNU Radio transceiver design, documented here. This design is intended for a bladeRF SDR, but the hardware available to me is the USRP B210. The final block of the script, which was originally an…
choga12
  • 3
  • 2
0
votes
1 answer

GNU Radio aliases occurrence dependent on data format

My setup is simply this: I'll post some slides I made below which explain my issue. Why doesn't the 700 Hz alias occur if I use the complex data format, but is shown for float data format? I suspect it has something to do with Euler's formula…
Riker_ncc
  • 3
  • 3
0
votes
0 answers

what exactly prevents my smartphone from being used as an SDR without a dedicated dongle

The answer seems obvious (frequencies restricted by chips) but I'm looking for a clear and accurate explanation. Several examples of SDR projects connecting an SDR dongle to a smartphone are available on the web, such as here or here etc. Thing is,…
Blupon
  • 101