GNSS Signal Path Calculator

Calculates signal level, noise figure and signal delay from antenna output to receiver input. Optional presets for antennas, cables, splitters, attenuators, amplifiers and receivers can be loaded from CSV files in the same directory.

Start values at antenna output

Signal level S0 [dBm]

Noise figure NF0 [dB]

Initial delay t0 [ns]

Typically S0 and NF0 correspond to the output of your GNSS antenna or LNA chain.

Add element

Element type

Preset / Manual

Name

ΔSignal [dB]

ΔNoise figure [dB]

ΔDelay [ns]

Positive ΔSignal means gain, negative ΔSignal means attenuation. ΔNoise figure is the noise figure of this element itself in dB. ΔDelay is the additional propagation time caused by this element.

Signal path

No elements in the path yet. Add an antenna or a receiver as the first element.

Result at receiver input

Signal level S_rx

-130.0 dBm

Noise figure NF_total

2.0 dB

Total delay t_total

0.0 ns

Noise figure is calculated using the Friis formula based on the gain and noise figure of each element in dB.