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gnss-sdr / gnss-sdr

GNSS-SDR, an open-source software-defined GNSS receiver
https://gnss-sdr.org
GNU General Public License v3.0
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Decoding latitude and longitude from recored signal BladeRF #251

Open wojciechkrukar opened 5 years ago

wojciechkrukar commented 5 years ago

I am trying to obtain longitude and latitude from the recorded GPS signal with BladeRF. I have trouble decoding it with GNS-SDR v0.0.10. on ubuntu 18.04

Antenna 17dB gain. The IQ signal looks pretty good when inspecting signal intensity (python) yet using the configuration file I have trouble obtaining fix of Longitude and Latitude.

Here is configuration of BladeRF: Bias Tee (RX1): on RX1 Frequency: 1575419998 Hz (Range: [70000000, 6000000000]) Frequency: 1575419998 Hz (Range: [70000000, 6000000000]) RX1 Bandwidth: 5000000 Hz (Range: [200000, 56000000]) Setting RX1 sample rate

req: 8000000 0/1Hz, actual: 8000000 0/1Hz

State: Running Channels: RX1 Last error: None File: /home/research/Desktop/GPS_IQ_recorded_data_1ch(SR8M_BW5M).bin

File format: SC16 Q11, Binary Samples: 503316480 Buff ers: 32 Samples per buffer: 32768 Transfers: 16 Timeout (ms): 1000

I am working with two configuration files but it feels like I am barking at the wrong tree. I have some form of synchronization but no position. Here are links to configuration files I am fiddling with. https://github.com/gnss-sdr/gnss-sdr/blob/next/conf/gnss-sdr_GPS_L1_bladeRF.conf

and of course, with the original file for the first fix https://gnss-sdr.org/my-first-fix/

the bin file is available here: https://drive.google.com/file/d/1HcN5dvYeI3lt41_sBCEAqFowGH0N4c4k/view?usp=sharing

Could you please help? I need to admit I am fairly new to the GNSS-SDR technology. Is there special software configuration or installation outside of GNSS – SDR necessary? Is there any good tutorial on how to deal with such file coming from BladeRF? Or maybe an obvious way to set parameters in the config file + some additional drivers required? Thanks, Mark

oscarmezyk commented 5 years ago

Hi. You're saying you have 17dB of antenna gain but you're processing a file - which is true? Where from you got the file of samples? What you mean by signal intensity?

Please see previous issues on bladeRF: https://github.com/gnss-sdr/gnss-sdr/issues/233 https://github.com/gnss-sdr/gnss-sdr/issues/243 https://github.com/gnss-sdr/gnss-sdr/issues/226

paste you're actuall config file and output of the gnss-sdr b.r. oskar

wojciechkrukar commented 5 years ago

The pipeline in my project is that I will be receiving a raw files from the field and build *.gpx . The antenna in the contraption of my supplier has gain of 17dB. The reason I posted this info is that it could be important clue for troubleshooting. I'll follow your suggestion and come back with update. Thank you, Mark

Argonghost commented 7 months ago

The pipeline in my project is that I will be receiving a raw files from the field and build *.gpx . The antenna in the contraption of my supplier has gain of 17dB. The reason I posted this info is that it could be important clue for troubleshooting. I'll follow your suggestion and come back with update. Thank you, Mark

Any update on this issue?

Im facing similar trouble smh