Gnss

HackRF setup for capturing GNSS signals

HackRF setup for capturing GNSS signals
  1. What is the sample rate of GNSS SDR?
  2. How is signal generated in GNSS?
  3. What can block GNSS signal?

What is the sample rate of GNSS SDR?

Up to 20 million samples per second.

How is signal generated in GNSS?

In contrast to GPS, GLONASS uses frequency division multiple access (FDMA) for signal modulation. This technique uses the same pseudorandom noise (PRN) code for all satellites to produce a spread spectrum signal.

What can block GNSS signal?

Signal Blockage

A GNSS receiver needs a clear line of sight to the satellites it is tracking. If the line of sight to a satellite is blocked by objects such as buildings, trees, bridges, etc., the receiver cannot receive signals from that satellite.

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