gr::trellis::fsm Class Reference

Finite State Machine Specification class. More...

#include <gnuradio/trellis/fsm.h>

Public Member Functions
	fsm ()
	Constructor to create an uninitialized FSMS. More...
	fsm (const fsm &FSM)
	Constructor to copy an FSMS. More...
	fsm (int I, int S, int O, const std::vector< int > &NS, const std::vector< int > &OS)
	Constructor to to create an FSMS. More...
	fsm (const char *name)
	Constructor to create an FSMS from file contents. More...
	fsm (int k, int n, const std::vector< int > &G)
	Creates an FSMS from the generator matrix of a (n, k) binary convolutional code. More...
	fsm (int mod_size, int ch_length)
	Creates an FSMS describing ISI. More...
	fsm (int P, int M, int L)
	Creates an FSMS describing the trellis for a CPM. More...
	fsm (const fsm &FSM1, const fsm &FSM2)
	Creates an FSMS describing the joint trellis of two FSMs. More...
	fsm (const fsm &FSMo, const fsm &FSMi, bool serial)
	Creates an FSMS describing the trellis of two serially concatenated FSMs. More...
	fsm (const fsm &FSM, int n)
	Creates an FSMS representing n stages through the originial FSM (AKA radix-n FSM). More...
int	I () const
int	S () const
int	O () const
const std::vector< int > &	NS () const
const std::vector< int > &	OS () const
const std::vector< std::vector < int > > &	PS () const
const std::vector< std::vector < int > > &	PI () const
const std::vector< int > &	TMi () const
const std::vector< int > &	TMl () const
void	write_trellis_svg (std::string filename, int number_stages)
	Creates an svg image of the trellis representation. More...
void	write_fsm_txt (std::string filename)
	Write the FSMS to a file. More...

Detailed Description

Finite State Machine Specification class.

An instance of this class represents a finite state machine specification (FSMS) rather than the FSM itself. It particular the state of the FSM is not stored within an instance of this class.

Constructor & Destructor Documentation

gr::trellis::fsm::fsm

(

)

Constructor to create an uninitialized FSMS.

gr::trellis::fsm::fsm

(

const fsm &

FSM

)

Constructor to copy an FSMS.

gr::trellis::fsm::fsm	(	int	I,
		int	S,
		int	O,
		const std::vector< int > &	NS,
		const std::vector< int > &	OS
	)

Constructor to to create an FSMS.

Parameters

I	The number of possible input symbols.
S	The number of possible FSM states.
O	The number of possible output symbols.
NS	A mapping from (current state, input symbol) to next state. next_state = NS[current_state * I + input_symbol]
OS	A mapping from (current state, input symbol) to output symbol. output_symbol = OS[current_state * I + input_symbol]

gr::trellis::fsm::fsm

(

const char *

name

)

Constructor to create an FSMS from file contents.

Parameters

name

filename

gr::trellis::fsm::fsm	(	int	k,
		int	n,
		const std::vector< int > &	G
	)

Creates an FSMS from the generator matrix of a (n, k) binary convolutional code.

Parameters

k	???
n	???
G	???

gr::trellis::fsm::fsm	(	int	mod_size,
		int	ch_length
	)

Creates an FSMS describing ISI.

Parameters

mod_size	modulation size
ch_length	channel length

gr::trellis::fsm::fsm	(	int	P,
		int	M,
		int	L
	)

Creates an FSMS describing the trellis for a CPM.

Parameters

P	???? h=K/P (relatively prime)
M	alphabet size
L	pulse duration

This FSM is based on the paper by B. Rimoldi "A decomposition approach to CPM", IEEE Trans. Info Theory, March 1988 See also my own notes at http://www.eecs.umich.edu/~anastas/docs/cpm.pdf

gr::trellis::fsm::fsm	(	const fsm &	FSM1,
		const fsm &	FSM2
	)

Creates an FSMS describing the joint trellis of two FSMs.

Parameters

FSM1	first FSMS
FSM2	second FSMS

gr::trellis::fsm::fsm	(	const fsm &	FSMo,
		const fsm &	FSMi,
		bool	serial
	)

Creates an FSMS describing the trellis of two serially concatenated FSMs.

Parameters

FSMo	outer FSMS
FSMi	inner FSMS
serial	set it to true to distinguish from the previous constructor

gr::trellis::fsm::fsm	(	const fsm &	FSM,
		int	n
	)

Creates an FSMS representing n stages through the originial FSM (AKA radix-n FSM).

Parameters

FSM	Original FSMs
n	Number of stages.

Member Function Documentation

int gr::trellis::fsm::I ( ) const

inline

const std::vector<int>& gr::trellis::fsm::NS ( ) const

inline

int gr::trellis::fsm::O ( ) const

inline

const std::vector<int>& gr::trellis::fsm::OS ( ) const

inline

const std::vector< std::vector<int> >& gr::trellis::fsm::PI ( ) const

inline

const std::vector< std::vector<int> >& gr::trellis::fsm::PS ( ) const

inline

int gr::trellis::fsm::S ( ) const

inline

const std::vector<int>& gr::trellis::fsm::TMi ( ) const

inline

const std::vector<int>& gr::trellis::fsm::TMl ( ) const

inline

void gr::trellis::fsm::write_fsm_txt

(

std::string

filename

)

Write the FSMS to a file.

Parameters

filename

filename

void gr::trellis::fsm::write_trellis_svg	(	std::string	filename,
		int	number_stages
	)

Creates an svg image of the trellis representation.

Parameters

filename	filename
number_stages	????

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

• fsm.h