Struct Phif32

pub struct Phif32 { /* private fields */ }

LDPC decoder arithmetic with $f and phi(x) involution.

This is a DecoderArithmetic that uses $f to represent the LLRs and messages and computes the check node messages using the involution phi(x) = -log(tanh(x/2)).

See (2.33) in page 68 in [2].

Implementations

impl Phif32

pub fn new() -> Phif32

Creates a new [$ty] decoder arithmetic object.

Trait Implementations

impl Clone for Phif32

fn clone(&self) -> Phif32

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Phif32

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl DecoderArithmetic for Phif32

type Llr = f32

LLR.

type CheckMessage = f32

Check node message.

type VarMessage = f32

Variable node message.

type VarLlr = f32

Variable LLR.

fn input_llr_quantize(&self, llr: f64) -> f32

Quantization function for input LLRs.

fn llr_hard_decision(&self, llr: f32) -> bool

Hard decision on LLRs.

fn llr_to_var_message(&self, llr: f32) -> f32

Transform LLR to variable message.

fn llr_to_var_llr(&self, llr: f32) -> f32

Transform LLR to variable LLR.

fn var_llr_to_llr(&self, var_llr: f32) -> f32

Transform variable LLR to LLR.

fn send_check_messages<F>(&mut self, var_messages: &[Message<f32>], send: F)

where F: FnMut(SentMessage<f32>),

Send check messages from a check node.

fn send_var_messages<F>( &mut self, input_llr: f32, check_messages: &[Message<f32>], send: F, ) -> f32

where F: FnMut(SentMessage<f32>),

Send variable messages from a variable node.

fn update_check_messages_and_vars( &mut self, check_messages: &mut [SentMessage<f32>], vars: &mut [f32], )

Update check messages and variable values for a check node.

impl Default for Phif32

fn default() -> Phif32

Returns the “default value” for a type.