Struct QuadrantQam 

pub struct QuadrantQam { /* private fields */ }

Square M-QAM whose quadrant is differentially encoded and whose points inside a quadrant are Gray-labelled (Pfau et al. 2009, Sec. III-A; see the module): the bits are read by a coherent receiver after a carrier recovery with an ambiguity of a multiple of $\pi/2$.

Implementations

impl QuadrantQam

pub fn new(m: usize) -> Result<QuadrantQam>

Square QAM of order m (4, 16, 64, …), of unit average energy.

Errors

Error::Config unless m is an even power of two ≥ 4.

pub fn order(&self) -> usize

The order $M$.

pub fn bits_per_symbol(&self) -> usize

Bits per symbol, $\log_{2} M$.

pub fn points(&self) -> Vec<C64>

The $M$ points (for the decisions of a carrier recovery).

pub fn map_bits(&self, bits: &[u8]) -> Result<Vec<C64>>

The n / log2 M + 1 symbols carrying n bits, the reference first (quadrant 0, inner label 0); the first two bits of every symbol select the quadrant transition.

Errors

Error::Shape if the number of bits is not a multiple of $\log_{2} M$.

pub fn demap_bits(&self, r: &[C64]) -> Result<Vec<u8>>

Hard decisions on n + 1 received symbols and differential decoding of their quadrants: n log2 M bits, whatever multiple of $\pi/2$ rotates the symbols.

Errors

Error::Shape for an empty input.

Trait Implementations

impl Clone for QuadrantQam

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 QuadrantQam

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

Formats the value using the given formatter.

impl PartialEq for QuadrantQam

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QuadrantQam