Index

A B C D F H I K L N O P R S T V
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A

addSamples(float[], int) - Method in class io.github.dkaukov.afsk.Afsk1200Demodulator

Afsk1200Demodulator - Class in io.github.dkaukov.afsk

Afsk1200Demodulator(int, HdlcDeframer.FrameListener) - Constructor for class io.github.dkaukov.afsk.Afsk1200Demodulator

Ax25Fcs - Class in io.github.dkaukov.afsk.atoms

Ax25Fcs() - Constructor for class io.github.dkaukov.afsk.atoms.Ax25Fcs

B

besselI0(double) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Zeroth-order modified Bessel function of the first kind (I0), series approx.

C

calculateFcs(byte[]) - Static method in class io.github.dkaukov.afsk.atoms.Ax25Fcs

Calculate the 16-bit AX.25 CRC (FCS) for the given data.

calculateFcs(byte[], Map<Integer, Byte>) - Static method in class io.github.dkaukov.afsk.atoms.Ax25Fcs

Calculate the 16-bit AX.25 CRC (FCS) for the given data with optional bit corrections.

cos() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillator

cos() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillatorFloat

D

DdsOscillator - Class in io.github.dkaukov.afsk.dsp

Direct Digital Synthesis (DDS) oscillator for generating sine and cosine waveforms.

DdsOscillator(float, float) - Constructor for class io.github.dkaukov.afsk.dsp.DdsOscillator

DdsOscillatorFloat - Class in io.github.dkaukov.afsk.dsp

DdsOscillatorFloat(float, float) - Constructor for class io.github.dkaukov.afsk.dsp.DdsOscillatorFloat

decode(int[]) - Method in class io.github.dkaukov.afsk.atoms.NrziDecoder

Decode a chunk of NRZI-encoded bits.

Demodulator - Class in io.github.dkaukov.afsk.atoms

AFSK (Audio Frequency Shift Keying) Demodulator.

Demodulator(float, float, float) - Constructor for class io.github.dkaukov.afsk.atoms.Demodulator

designBandPassKaiser(int, float, float, float, float) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Band-pass via difference of two low-passes (Kaiser window).

designLowPassHamming(int, float, float) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Low-pass via windowed-sinc (Hamming). cutoffHz is 3dB point approx.

designLowPassKaiser(int, float, float, float) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Low-pass via Kaiser window. attenuationDb controls sidelobes; 60–80dB good defaults.

designRrc(int, float, float) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Root-Raised-Cosine (RRC) low-pass shaping filter. rolloff α in (0,1], taps must be odd.

F

FastFIR - Class in io.github.dkaukov.afsk.dsp

Transposed direct-form FIR (“FastFIR”)

FastFIR(float[]) - Constructor for class io.github.dkaukov.afsk.dsp.FastFIR

filter(float) - Method in class io.github.dkaukov.afsk.dsp.FastFIR

Filter one sample.

FilterDesignUtils - Class in io.github.dkaukov.afsk.dsp

FIR tap designers: Hamming LPF, Kaiser LPF/BPF, Root-Raised-Cosine (RRC).

FrameVerifier - Class in io.github.dkaukov.afsk.atoms

FrameVerifier() - Constructor for class io.github.dkaukov.afsk.atoms.FrameVerifier

H

HdlcDeframer - Class in io.github.dkaukov.afsk.atoms

HdlcDeframer() - Constructor for class io.github.dkaukov.afsk.atoms.HdlcDeframer

HdlcDeframer.FrameListener - Interface in io.github.dkaukov.afsk.atoms

I

io.github.dkaukov.afsk - package io.github.dkaukov.afsk

io.github.dkaukov.afsk.atoms - package io.github.dkaukov.afsk.atoms

io.github.dkaukov.afsk.dsp - package io.github.dkaukov.afsk.dsp

K

kaiserBeta(double) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Kaiser window beta from desired stopband attenuation (dB).

L

length() - Method in class io.github.dkaukov.afsk.dsp.FastFIR

N

next() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillator

Advance the oscillator.

next() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillatorFloat

Advance phase (if you want manual phase control).

normalizeUnityGain(float[]) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Normalize taps so DC gain ≈ 1.

NrziDecoder - Class in io.github.dkaukov.afsk.atoms

NRZI (Non-Return-to-Zero Inverted) decoder.

NrziDecoder() - Constructor for class io.github.dkaukov.afsk.atoms.NrziDecoder

O

onFrame(byte[]) - Method in interface io.github.dkaukov.afsk.atoms.HdlcDeframer.FrameListener

P

processBits(int[], HdlcDeframer.FrameListener) - Method in class io.github.dkaukov.afsk.atoms.HdlcDeframer

processChunk(float[], int) - Method in class io.github.dkaukov.afsk.atoms.Demodulator

Efficiently demodulate a chunk of audio samples.

processSample(float) - Method in class io.github.dkaukov.afsk.atoms.Demodulator

Optional: process a single sample at a time (less efficient).

R

reset() - Method in class io.github.dkaukov.afsk.atoms.HdlcDeframer

reset() - Method in class io.github.dkaukov.afsk.atoms.NrziDecoder

Reset decoder state (useful between frames).

reset() - Method in class io.github.dkaukov.afsk.atoms.SymbolSlicerPll

reset() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillator

reset() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillatorFloat

reset() - Method in class io.github.dkaukov.afsk.dsp.FastFIR

Clear internal state.

rrcSample(float, float) - Static method in class io.github.dkaukov.afsk.dsp.FilterDesignUtils

Single RRC tap value.

S

sin() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillator

sin() - Method in class io.github.dkaukov.afsk.dsp.DdsOscillatorFloat

slice(float[]) - Method in class io.github.dkaukov.afsk.atoms.SymbolSlicerPll

Slice an entire chunk of demodulated samples into bits.

SymbolSlicerPll - Class in io.github.dkaukov.afsk.atoms

AFSK Slicer with PLL (Phase-Locked Loop) for demodulating AFSK signals.

SymbolSlicerPll(float, float) - Constructor for class io.github.dkaukov.afsk.atoms.SymbolSlicerPll

T

taps() - Method in class io.github.dkaukov.afsk.dsp.FastFIR

V

verifyAndStrip(byte[]) - Method in class io.github.dkaukov.afsk.atoms.FrameVerifier

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