Struct Sphere 

pub struct Sphere {
    pub constellation: Constellation,
}

Exact ML detection by the Schnorr–Euchner sphere decoder.

After $H = Q R$, the tree of the streams is searched depth first from the last one, visiting the points of each level by increasing partial distance and pruning every branch whose partial distance exceeds the best complete one found so far.

Fields

constellation: Constellation

The alphabet of every stream.

Implementations

impl Sphere

pub fn new(constellation: Constellation) -> Sphere

The sphere decoder.

Trait Implementations

impl Clone for Sphere

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 Sphere

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

Formats the value using the given formatter.

impl MimoDetector for Sphere

fn constellation(&self) -> &Constellation

The alphabet of every stream (the labels of MimoDetector::detect index its points).

fn detect( &self, h: &ArrayView2<'_, C64>, y: &[C64], noise_var: f64, ) -> Result<Vec<usize>>

The label of the decided point of every transmit stream.

fn detect_block( &self, h: &ArrayView2<'_, C64>, y: &ArrayView2<'_, C64>, noise_var: f64, ) -> Result<Array2<usize>>

Detect every column of y (n_rx × T) with the same channel: the labels, n_tx × T. The detectors of this module factor the channel once for the block.

fn has_soft_output(&self) -> bool

Whether MimoDetector::llr gives bit LLRs (false: it returns an error).

fn soft_estimate( &self, _h: &ArrayView2<'_, C64>, _y: &[C64], _noise_var: f64, ) -> Result<Option<Estimates>>

The estimates of the transmitted symbols and their noise variances, when the detector forms them (None for the detectors that decide on the lattice).

fn llr( &self, _h: &ArrayView2<'_, C64>, _y: &[C64], _noise_var: f64, ) -> Result<Vec<f64>>

Bit LLRs, $n_{t} \log_{2} M$ of them (positive for a 0).

fn detect_llr( &self, h: &ArrayView2<'_, C64>, y: &[C64], noise_var: f64, ) -> Result<(Vec<usize>, Vec<f64>)>

The labels and the bit LLRs of one channel use, those of MimoDetector::detect and MimoDetector::llr; the detectors with soft output get both from one search.

impl PartialEq for Sphere

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Sphere