Struct CcsdsLdpc 

pub struct CcsdsLdpc { /* private fields */ }

The LDPC codes of CCSDS (see the module): the decoder of LdpcCode on the full parity-check matrix, the encoder of the standard, the virtual zeros and the punctured bits.

Implementations

impl CcsdsLdpc

pub fn c2() -> Result<CcsdsLdpc>

The (8160, 7136) code of rate 223/255 (Sec. 7.3).

Errors

Never: the tables are those of the standard.

pub fn ar4ja(k: usize, rate: Ar4jaRate) -> Result<CcsdsLdpc>

The AR4JA code of k information bits (1024, 4096 or 16384) and rate rate (Sec. 7.4). Building the code of $k = 16384$ and rate 1/2 inverts an $8192 \times 8192$ binary matrix (seconds in release).

Errors

Error::Config for another $k$.

pub fn ldpc(&self) -> &LdpcCode

The code of the full parity-check matrix (its decoder settings are public fields).

pub fn ldpc_mut(&mut self) -> &mut LdpcCode

The code of the full parity-check matrix, to change its decoder settings.

pub fn full_codeword(&self, info: &[u8]) -> Result<Vec<u8>>

The codeword of the full parity-check matrix ($n$ = 8176 or $(K + 3) M$ bits) of info: the 18 virtual zeros of the rate-7/8 code, the information, the parity bits, the punctured ones of the AR4JA codes included; LdpcCode::is_codeword of CcsdsLdpc::ldpc checks it.

Errors

Error::Shape unless info has $k$ bits.

Trait Implementations

impl BlockCode for CcsdsLdpc

fn n(&self) -> usize

The transmitted bits: 8160, or $(K + 2) M$ (Table 7-5).

fn k(&self) -> usize

Information bits per block.

fn encode_block(&self, info: &[u8]) -> Result<Vec<u8>>

Encode one block of $k$ bits.

fn decode_block(&self, llr: &[f64]) -> Result<Vec<u8>>

Decode one block of $n$ LLRs into $k$ bits.

fn encode_block_into(&self, info: &[u8], out: &mut [u8]) -> Result<()>

Encode one block of $k$ bits into the $n$ values of out (ADR 0011: the default copies BlockCode::encode_block; a code overrides it when a profile shows the copy).

fn decode_block_into(&self, llr: &[f64], out: &mut [u8]) -> Result<()>

Decode one block of $n$ LLRs into the $k$ values of out (as BlockCode::encode_block_into).

fn code_rate(&self) -> f64

Code rate $k/n$.

fn encode_stream(&self, info: &[u8]) -> Result<Vec<u8>>

Encode whole blocks.

fn decode_stream(&self, llr: &[f64]) -> Result<Vec<u8>>

Decode whole blocks.

impl Clone for CcsdsLdpc

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CcsdsLdpc

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

Formats the value using the given formatter.

impl Decode for CcsdsLdpc

fn decode_into(&mut self, llr: &Llr, out: &mut Bits) -> Result<()>

Decode llr into out.

fn decode(&mut self, llr: &Llr) -> Result<Bits, Error>

Decode llr (allocates, calls Decode::decode_into).

impl Encode for CcsdsLdpc

fn rate(&self) -> f64

Code rate k/n.

fn encode_into(&self, info: &Bits, out: &mut Bits) -> Result<()>

Encode info into out.

fn encode(&self, info: &Bits) -> Result<Bits, Error>

Encode info (allocates, calls Encode::encode_into).

impl PartialEq for CcsdsLdpc

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl SoftDecode for CcsdsLdpc

fn app_into( &self, llr: &[f64], apriori: Option<&[f64]>, out: &mut [f64], ) -> Result<usize>

The a posteriori LLRs of the information bits by belief propagation on the full parity-check matrix; the a priori LLRs add to the channel LLRs of the information bits.

fn app(&self, llr: &[f64], apriori: Option<&[f64]>) -> Result<Vec<f64>>

SoftDecode::app_into into a new vector.

impl StructuralPartialEq for CcsdsLdpc