internal

Documentation

Overview

Package internal contains kerberos specific internal bits of API.

Index

• func AlignReaders(planner fft.Planner, readers []sdr.Reader) error
• func FFTShiftAndScale(data []complex64, scale float32) error
• func GraftReaders(planner fft.Planner, readers []sdr.Reader) (sdr.ReadCloser, error)
• func PhaseOffsets(readers []sdr.Reader) ([]complex64, error)
• func ReadBuffers(readers []sdr.Reader, bufs []sdr.SamplesC64) error
• type CrossCorrelater
  • func NewCrossCorrelater(planner fft.Planner, fftLength int) (*CrossCorrelater, error)
  • func (cc CrossCorrelater) Correlate(buf1, buf2 sdr.SamplesC64) ([]complex64, error)

Functions

func AlignReaders

func AlignReaders(planner fft.Planner, readers []sdr.Reader) error

AlignReaders will align multiple readers to be in sample lock.

func FFTShiftAndScale

func FFTShiftAndScale(data []complex64, scale float32) error

FFTShiftAndScale will do a FFT frequency flip, and also scale any values by a float32 real value (both real and imag) which helps if the resulting FFT is unscaled.

func GraftReaders

func GraftReaders(planner fft.Planner, readers []sdr.Reader) (sdr.ReadCloser, error)

GraftReaders will combine (in frequency space) multiple readers, and return an sdr.Reader at a higher sample rate.

func PhaseOffsets

func PhaseOffsets(readers []sdr.Reader) ([]complex64, error)

PhaseOffsets will compute the PLL startup-specific phase offsets from eachother. Although we're in sample lock, because each RTL has their own PLL and friends, they will still have phase differences. We must correct for these when doing coherent operations.

func ReadBuffers

func ReadBuffers(readers []sdr.Reader, bufs []sdr.SamplesC64) error

ReadBuffers will do an sdr.ReadFull for each reader and buffer pair.

Types

type CrossCorrelater

type CrossCorrelater struct {
	// contains filtered or unexported fields
}

CrossCorrelater contains internal members to run CrossCorrelations.

func NewCrossCorrelater

func NewCrossCorrelater(planner fft.Planner, fftLength int) (*CrossCorrelater, error)

NewCrossCorrelater will return a new CrossCorrelater ready to check buffers.

func (CrossCorrelater) Correlate

func (cc CrossCorrelater) Correlate(
	buf1, buf2 sdr.SamplesC64,
) ([]complex64, error)

Correlate will check the alignment of two buffers.