CECCO::NRZDemapper Class Reference

Non-Return-to-Zero (NRZ) hard-decision demapper. More...

#include <blocks.hpp>

Inheritance diagram for CECCO::NRZDemapper:

Public Member Functions
constexpr	NRZDemapper (const NRZMapper &nrz) noexcept
	Construct from the corresponding mapper.
	NRZDemapper (const BI_AWGN &bi_awgn) noexcept
	Construct from a BI-AWGN channel (convenience).
constexpr Fp< 2 >	operator() (const std::complex< double > &in) noexcept
	Hard-decide a received symbol.
Public Member Functions inherited from CECCO::details::BlockProcessor< T, std::complex< double >, Fp< 2 > >
Vector< Fp< 2 > >	operator() (const Vector< std::complex< double > > &in)
	Apply the block element-wise to each vector entry.
Vector< Fp< 2 > >	operator() (Vector< std::complex< double > > &&in)
	Apply the block element-wise (rvalue input).
Matrix< Fp< 2 > >	operator() (const Matrix< std::complex< double > > &in)
	Apply the block element-wise to each matrix entry.
Matrix< Fp< 2 > >	operator() (Matrix< std::complex< double > > &&in)
	Apply the block element-wise (rvalue input).
Fp< 2 >	operator() (const U &)
	Catch-all for inputs whose element type differs from InputType.
Vector< Fp< 2 > >	operator() (const Vector< U > &)
Matrix< Fp< 2 > >	operator() (const Matrix< U > &)

Additional Inherited Members
Protected Member Functions inherited from CECCO::details::BlockProcessor< T, std::complex< double >, Fp< 2 > >
const T &	derived () const noexcept
T &	derived () noexcept

Detailed Description

Non-Return-to-Zero (NRZ) hard-decision demapper.

Maximum-likelihood threshold detector for NRZ-modulated symbols received over AWGN: outputs 1 if Re(r) ≥ a, otherwise 0, where a is the DC offset of the corresponding CECCO::NRZMapper. The imaginary part is ignored.

NRZMapper map(0.5, 1.0);                  // Constellation: {0, 1}
NRZDemapper demap(map);                   // Threshold at a = 0.5
Vector<std::complex<double>> y = {{0.3, 0.1}, {0.8, −0.2}};
Vector<Fp<2>> c_est = y >> demap;         // {0, 1}

See also

CECCO::NRZMapper, CECCO::BPSKDemapper, CECCO::LLRCalculator

Definition at line 745 of file blocks.hpp.

Constructor & Destructor Documentation

NRZDemapper() [1/2]

CECCO::NRZDemapper::NRZDemapper ( const NRZMapper & nrz )

inlineconstexprnoexcept

Construct from the corresponding mapper.

Parameters

nrz	Source mapper whose DC offset becomes the decision threshold

Definition at line 754 of file blocks.hpp.

Here is the call graph for this function:

Here is the caller graph for this function:

NRZDemapper() [2/2]

CECCO::NRZDemapper::NRZDemapper ( const BI_AWGN & bi_awgn )

inlinenoexcept

Construct from a BI-AWGN channel (convenience).

Parameters

bi_awgn

Channel whose internal mapper provides the decision threshold

Definition at line 760 of file blocks.hpp.

Here is the call graph for this function:

Member Function Documentation

operator()()

Fp< 2 > CECCO::NRZDemapper::operator() ( const std::complex< double > & in )

inlineconstexprnoexcept

Hard-decide a received symbol.

Parameters

in	Received complex value (imaginary part ignored)

Returns

1 if Re(in) ≥ a, else 0

Definition at line 767 of file blocks.hpp.

---

The documentation for this class was generated from the following file:

• blocks.hpp