Struct Ft8Codec 

pub struct Ft8Codec;

FT8 channel encoder/decoder.

Implementations

impl Ft8Codec

pub fn encode(payload: &Ft8Bits) -> Ft8Frame

Encode a 77-bit payload into an Ft8Frame of 58 Gray-coded tone indices.

Steps: payload → CRC-14 appended → LDPC(174,91) → Gray code → 58 tones.

pub fn decode_hard(frame: &Ft8Frame) -> Option<Ft8Bits>

Decode an Ft8Frame using hard decisions.

Applies inverse Gray code, treats each bit as a ±10 LLR, runs LDPC, then verifies the CRC. Returns the 77-bit payload on success.

pub fn decode_soft(llr: &[f32; 174]) -> Option<Ft8Bits>

Decode using soft LLR values produced by a sync/correlator stage.

llrs — 174 floats, LLR = log(P(bit=0)/P(bit=1)), positive ⇒ likely 0.

pub fn frame_to_llr_hard(frame: &Ft8Frame) -> [f32; 174]

Convert an Ft8Frame (hard tone decisions) into 174 LLRs (±10.0).