Decodes a bitstream with the desired baud rate. More...

#include <fsk.hh>

Inheritance diagram for sdr::BitStream:

Public Types
enum	Mode { NORMAL, TRANSITION }
	Possible bit decoding modes. More...

Public Member Functions
	BitStream (float baud, Mode mode=TRANSITION)
	Constructor. More...

void	config (const Config &src_cfg)
	Needs to be implemented by any sub-type to check and perform the configuration of the node. More...

void	process (const Buffer< uint8_t > &buffer, bool allow_overwrite)
	Needs to be implemented by any sub-type to process the received data. More...

Public Member Functions inherited from sdr::Sink< uint8_t >
	Sink ()
	Constructor. More...

virtual	~Sink ()
	Drestructor. More...

virtual void	handleBuffer (const RawBuffer &buffer, bool allow_overwrite)
	Re-implemented from `SinkBase`. More...

Public Member Functions inherited from sdr::SinkBase
	SinkBase ()
	Constructor. More...

virtual	~SinkBase ()
	Destructor. More...

Public Member Functions inherited from sdr::Source
	Source ()
	Constructor. More...

virtual	~Source ()
	Destructor. More...

virtual void	send (const RawBuffer &buffer, bool allow_overwrite=false)
	Sends the given buffer to all connected sinks. More...

void	connect (SinkBase *sink, bool direct=false)
	Connect this source to a sink. More...

void	disconnect (SinkBase *sink)
	Disconnect a sink again. More...

virtual void	setConfig (const Config &config)
	Stores the configuration and propergates it if the configuration has been changed. More...

virtual double	sampleRate () const
	Returns the configured sample rate or `0` otherwise. More...

virtual Config::Type	type () const
	Returns the configured source type or `Config::Type_UNDEFINED` otherwise. More...

template<class T >
void	addEOS (T instance, void(T::function)())
	Adds a callback to the end-of-stream signal of the source. More...

Protected Attributes
float	_baud
	The baud rate. More...

Mode	_mode
	The bit detection mode. More...

size_t	_corrLen
	The approximative bit length in samples. More...

Buffer< int8_t >	_symbols
	Last received symbols. More...

size_t	_symIdx
	Insertion index for the next symbol. More...

int32_t	_symSum
	Sum over all received symbol (encoded as -1 & 1). More...

int32_t	_lastSymSum
	Last sum over all received symbol (encoded as -1 & 1). More...

float	_phase
	Current bit "phase". More...

float	_omega
	Phase velocity. More...

float	_omegaMin
	Minimum phase velocity. More...

float	_omegaMax
	Maximum phase velocity. More...

float	_pllGain
	PLL gain. More...

uint8_t	_lastBits
	The last decoded bits (needed for transition mode). More...

Buffer< uint8_t >	_buffer
	Output buffer. More...

Protected Attributes inherited from sdr::Source
Config	_config
	Holds the source configuration, this can be updated by calling `setConfig`. More...

std::map< SinkBase *, bool >	_sinks
	The connected sinks. More...

std::list< DelegateInterface * >	_eos
	The connected EOS singal handlers. More...

Additional Inherited Members
Protected Member Functions inherited from sdr::Source
void	signalEOS ()
	Signals the EOS. More...

void	propagateConfig (const Config &config)
	Propagates the given configuration to all connected sinks. More...

Detailed Description

Decodes a bitstream with the desired baud rate.

This node implements a simple PLL to syncronize the bit sampling with the transitions of the input symbol sequence.

Member Enumeration Documentation

enum sdr::BitStream::Mode

Possible bit decoding modes.

Enumerator
NORMAL	Normal mode (i.e. mark -> 1, space -> 0).
TRANSITION	Transition mode (i.e. transition -> 0, no transition -> 1).

Constructor & Destructor Documentation

BitStream::BitStream	(	float	baud,
		Mode	mode = `TRANSITION`
	)

Constructor.

Parameters

baud	Specifies the baud-rate of the input signal.
mode	Specifies the bit detection mode.

Member Function Documentation

void BitStream::config ( const Config & src_cfg )

virtual

Needs to be implemented by any sub-type to check and perform the configuration of the node.

Implements sdr::SinkBase.

void BitStream::process	(	const Buffer< uint8_t > &	buffer,
		bool	allow_overwrite
	)

virtual

Needs to be implemented by any sub-type to process the received data.

Implements sdr::Sink< uint8_t >.

Member Data Documentation

float sdr::BitStream::_baud

protected

The baud rate.

Buffer<uint8_t> sdr::BitStream::_buffer

protected

Output buffer.

size_t sdr::BitStream::_corrLen

protected

The approximative bit length in samples.

uint8_t sdr::BitStream::_lastBits

protected

The last decoded bits (needed for transition mode).

int32_t sdr::BitStream::_lastSymSum

protected

Last sum over all received symbol (encoded as -1 & 1).

Mode sdr::BitStream::_mode

protected

The bit detection mode.

float sdr::BitStream::_omega

protected

Phase velocity.

float sdr::BitStream::_omegaMax

protected

Maximum phase velocity.

float sdr::BitStream::_omegaMin

protected

Minimum phase velocity.

float sdr::BitStream::_phase

protected

Current bit "phase".

float sdr::BitStream::_pllGain

protected

PLL gain.

Buffer<int8_t> sdr::BitStream::_symbols

protected

Last received symbols.

size_t sdr::BitStream::_symIdx

protected

Insertion index for the next symbol.

int32_t sdr::BitStream::_symSum

protected

Sum over all received symbol (encoded as -1 & 1).

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

/Users/hannes/Uni/Elektronik/sdr/libsdr/src/fsk.hh
/Users/hannes/Uni/Elektronik/sdr/libsdr/src/fsk.cc

Public Types

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation