SPUC::mle< Numeric > Class Template Reference
[Equalization Classes, Communication Classes]

A Configurable Maximum Likelihood Sequence Estimator Class. More...

#include <mle.h>

Collaboration diagram for SPUC::mle< Numeric >:

[legend]List of all members.

Public Member Functions
	mle (int mlsd_size, int dfe_size=0, long q=1)
	phase increment for MLSD_CPM (should divide evenly into 360 degrees) (not implemented)
	~mle (void)
void	reset ()
	Reset filter.
void	update_taps_lms (Numeric err)
	Update coefficients.
Numeric	tap0 (void)
	Get tap0.
void	set_cir (const fir< Numeric > &cir)
	Copy channel impulse response.
Numeric	df_est (int state)
Numeric	ff_estimate (long seq)
	Feedforward estimates.
double	estimate (Numeric rx, long seq, long state, long type)
	Allows selection of Equalizer type.
long	ddfse (Numeric rx)
	Perform DDFSE Sequence detection.
long	mlsd (Numeric rx)
	Perform MLSD Sequence detection.
long	rsdfse (Numeric rx)
	Perform RSDFSE Sequence detection.
long	equalize (Numeric rx, long type)
	Generic Sequence detection allowing selection of type.
Public Attributes
const long	mlsd_span
const long	dfe_span
	number of bits spanned by MLSD part of equaliser
long	n_branches
	Number of bits spanned by DFE part of equaliser.
long	n_states
	Number of branches.
Numeric	fb_est
	Number of states.
fir_adapt< Numeric >	cfir
	Feedback estimator for RSDFSE.
Numeric *	cir_mlsd
	Channel impulse response.
Numeric *	cir_dfe
Numeric *	f_est
Numeric *	b_est
	Feedforward.
double *	weight
long *	path
	state metric calculations/state
long *	tmp_path
	path history
double *	tmp_weight
long *	path_symbol
long	phase_states
long	total_states
	Phase states for MLSD_CPM (not implemented).
double	phase_inc
	for CPM total = n_states*phase_states! (not implemented)

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Detailed Description

template<class Numeric>
class SPUC::mle< Numeric >

A Configurable Maximum Likelihood Sequence Estimator Class.

can be configured as either a

MLSD - Basic Maximum Likelihood Sequence Detector

DDFSE - MLSD with Delayed Decision Feedback Sequence Detector

RSDFSE - MLSD with Reduced State Decision Feedback Sequence Detector

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Constructor & Destructor Documentation

template<class Numeric> SPUC::mle< Numeric >::mle (  int  mlsd_size, int  dfe_size = 0, long  q = 1 )  [inline]

phase increment for MLSD_CPM (should divide evenly into 360 degrees) (not implemented) Constructor (default to MLSE with no feedback) q=1 Binary, q=2 Quaternary

template<class Numeric> SPUC::mle< Numeric >::~mle (  void   )  [inline]

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Member Function Documentation

template<class Numeric> long SPUC::mle< Numeric >::ddfse (  Numeric  rx  )  [inline]

Perform DDFSE Sequence detection.

template<class Numeric> Numeric SPUC::mle< Numeric >::df_est (  int  state  )  [inline]

Calculate convolution of feedback taps with past decisions for a particular state (for next iteration of branch metric calculation)

template<class Numeric> long SPUC::mle< Numeric >::equalize (  Numeric  rx, long  type )  [inline]

Generic Sequence detection allowing selection of type.

template<class Numeric> double SPUC::mle< Numeric >::estimate (  Numeric  rx, long  seq, long  state, long  type )  [inline]

Allows selection of Equalizer type.

template<class Numeric> Numeric SPUC::mle< Numeric >::ff_estimate (  long  seq  )  [inline]

Feedforward estimates.

template<class Numeric> long SPUC::mle< Numeric >::mlsd (  Numeric  rx  )  [inline]

Perform MLSD Sequence detection.

template<class Numeric> void SPUC::mle< Numeric >::reset (  void   )  [inline]

Reset filter.

template<class Numeric> long SPUC::mle< Numeric >::rsdfse (  Numeric  rx  )  [inline]

Perform RSDFSE Sequence detection.

template<class Numeric> void SPUC::mle< Numeric >::set_cir (  const fir< Numeric > &  cir  )  [inline]

Copy channel impulse response.

template<class Numeric> Numeric SPUC::mle< Numeric >::tap0 (  void   )  [inline]

Get tap0.

template<class Numeric> void SPUC::mle< Numeric >::update_taps_lms (  Numeric  err  )  [inline]

Update coefficients.

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Member Data Documentation

template<class Numeric> Numeric* SPUC::mle< Numeric >::b_est

Feedforward.

template<class Numeric> fir_adapt< Numeric > SPUC::mle< Numeric >::cfir

Feedback estimator for RSDFSE.

template<class Numeric> Numeric* SPUC::mle< Numeric >::cir_dfe

template<class Numeric> Numeric* SPUC::mle< Numeric >::cir_mlsd

Channel impulse response.

template<class Numeric> const long SPUC::mle< Numeric >::dfe_span

number of bits spanned by MLSD part of equaliser

template<class Numeric> Numeric* SPUC::mle< Numeric >::f_est

template<class Numeric> Numeric SPUC::mle< Numeric >::fb_est

Number of states.

template<class Numeric> const long SPUC::mle< Numeric >::mlsd_span

template<class Numeric> long SPUC::mle< Numeric >::n_branches

Number of bits spanned by DFE part of equaliser.

template<class Numeric> long SPUC::mle< Numeric >::n_states

Number of branches.

template<class Numeric> long* SPUC::mle< Numeric >::path

state metric calculations/state

template<class Numeric> long* SPUC::mle< Numeric >::path_symbol

template<class Numeric> double SPUC::mle< Numeric >::phase_inc

for CPM total = n_states*phase_states! (not implemented)

template<class Numeric> long SPUC::mle< Numeric >::phase_states

template<class Numeric> long* SPUC::mle< Numeric >::tmp_path

path history

template<class Numeric> double* SPUC::mle< Numeric >::tmp_weight

template<class Numeric> long SPUC::mle< Numeric >::total_states

Phase states for MLSD_CPM (not implemented).

template<class Numeric> double* SPUC::mle< Numeric >::weight

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

• equalizers/mle.h

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