Function lupnt::SigmaFll(const FllParams&, Real)

• Defined in File comms_utils.cc

Function Documentation

Real lupnt::SigmaFll(const FllParams &params, Real CN0_w)

Compute the frequency-tracking (FLL) error standard deviation for a given carrier-to-noise ratio.

Used together with the carrier wavelength by GNSSMeasurements::ComputeSigmaRangeRate to derive the Doppler/range-rate noise (sigma_doppler_hz) stored on a GnssChannel.

Parameters:

• params – FLL tracking-loop parameters (bandwidth, integration time, CN0 threshold below which the squaring-loss factor doubles)

• CN0_w – Carrier-to-noise ratio [W/W, linear, not dB-Hz]

Returns:

FLL tracking error standard deviation [Hz]