Communication classes And functions

Collaboration diagram for Communication classes And functions:

Classes
class	SPUC::base_demod< Numeric >
	base class for a demodulator (not currently used?) More...
class	SPUC::bit_scrambler
	Data scrambler. More...
class	SPUC::bpe< Numeric, Coeff >
	Block Phase Estimator. More...
class	SPUC::carrier_nco
	A specialization example of a sin/cosine look-up NCO. More...
class	SPUC::data_conv_encoder
	Convolutional encoder for punctured encoding. More...
class	SPUC::dqpsk
	Differential QPSK encoder/decoder. More...
class	SPUC::dvb_conv_encoder
	DVB Convolution encode for rate 1/2. More...
class	SPUC::fading_channel
class	SPUC::lms_dfe< Numeric, Coeff >
	Template Class for LMS Decision Feedback equalizer. More...
class	SPUC::mle< Numeric >
	A Configurable Maximum Likelihood Sequence Estimator Class. More...
class	SPUC::ofdm_data_encoder
	OFDM/802.11A/G Data Encoder. More...
class	SPUC::qam_conv_decoder
	QAM convolutional decoder. More...
class	SPUC::qam_mod
	QAM Modulator for BPSK - 64 QAM for 802.11A Data modulation. More...
class	SPUC::qam_tx< Numeric >
	Class for QAM transmitter using a root raised cosine transmit filter. More...
class	SPUC::qpsk< Numeric >
	A QPSK receiver that can operate at exactly 2 samples/symbol. More...
class	SPUC::qpsk_discriminators
	A Class incorporating several symbol and carrier discriminators for QPSK. More...
class	SPUC::qpsk_variable< Numeric >
	A QPSK receiver that can operate over a range of non-integer sampling rates. More...
class	SPUC::quad_data< Numeric >
	Class for QPSK data using a root raised cosine transmit filter. More...
class	SPUC::rls< Numeric >
	Recursive Least Squares Algorithm. More...
class	SPUC::viterbi
	A Viterbi decoder (for DVB). More...
Functions
template<class T>
T	SPUC::bpsk_dd_phase (complex< T > curr, complex< T > hard_data)
	Decision directed carrier phase discriminator for BPSK.
template<class T>
T	SPUC::bpsk_quadricorrelator (complex< T > hard_data, complex< T > prev)
	BPSK Quadricorrelator frequency discriminator.
template<class T>
T	SPUC::cp_afc (complex< T > prev, complex< T > curr)
	Cross-Product frequency discriminator.
template<class T>
T	SPUC::dd_symbol (complex< T > prev, complex< T > curr, complex< T > prev_hard_data, complex< T > hard_data)
	Decision directed timing discriminator (QPSK).
template<class T>
T	SPUC::nda_symbol (complex< T > prev, complex< T > curr)
	Non-decision aided timing discriminator (Gardiner's algorithm).
void	SPUC::qam_data_demap (long rate_index, complex< long > data_in, long soft_decision_level, smart_array< long > viterbi_input)
	Soft-decision QAM Demapper (used in 802.11A).
void	SPUC::bpsk_soft_decision (complex< long > data_in, smart_array< long > viterbi_input)
	BPSK data demapping.
void	SPUC::qpsk_soft_decision (complex< long > data_in, smart_array< long > viterbi_input)
	QPSK data demapping.
void	SPUC::qam16_soft_decision (complex< long > data_in, long soft_decision_level, smart_array< long > viterbi_input)
	16-QAM data demapping
void	SPUC::qam64_soft_decision (complex< long > data_in, long soft_decision_level, smart_array< long > viterbi_input)
	64-QAM data demapping
template<class T>
T	SPUC::qpsk_dd_phase (complex< T > curr, complex< T > hard_data)
	Decision directed carrier phase discriminator for QPSK.
template<class T>
T	SPUC::qpsk_quadricorrelator (complex< T > hard_data, complex< T > prev)
template<class T>
T	SPUC::qpsk_rcfd (complex< T > fmf, complex< T > curr)
template<class T>
void	SPUC::raised_cosine (fir_coeff< T > &rcfir, float_type alpha, int rate)
	Raised Cosine functions.
template<class T>
void	SPUC::root_raised_cosine_quantized (fir_coeff< T > &rcfir, float_type alpha, int rate, int bits, float_type scale)
	Root Raised Cosine functions.

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Function Documentation

template<class T>

T SPUC::bpsk_dd_phase	(	complex< T >	curr,
		complex< T >	hard_data
	)

Decision directed carrier phase discriminator for BPSK.

Runs at the symbol rate Curr - current symbol Hard_data - Hard decision for current symbol

Author:

Tony Kirke

template<class T>

T SPUC::bpsk_quadricorrelator	(	complex< T >	hard_data,
		complex< T >	prev
	)

BPSK Quadricorrelator frequency discriminator.

Hard_data - Hard decision (complex) data for current symbol Prev - Previous symbol (prior to hard decision)

Author:

Tony Kirke

void SPUC::bpsk_soft_decision	(	complex< long >	data_in,
		smart_array< long >	viterbi_input
	)

BPSK data demapping.

Author:

Tony Kirke

template<class T>

T SPUC::cp_afc	(	complex< T >	prev,
		complex< T >	curr
	)

Cross-Product frequency discriminator.

Prev - previous symbol Curr - current symbol

Author:

Tony Kirke

template<class T>

T SPUC::dd_symbol	(	complex< T >	prev,
		complex< T >	curr,
		complex< T >	prev_hard_data,
		complex< T >	hard_data
	)

Decision directed timing discriminator (QPSK).

Runs at the symbol rate Curr - current symbol Hard_data - Hard decision for current symbol Prev - Previous symbol Prev_Hard_data - Hard decision for previous symbol

Author:

Tony Kirke

template<class T>

T SPUC::nda_symbol	(	complex< T >	prev,
		complex< T >	curr
	)

Non-decision aided timing discriminator (Gardiner's algorithm).

Runs at twice the symbol rate Curr - current sample Prev - Previous sample

Author:

Tony Kirke

void SPUC::qam16_soft_decision	(	complex< long >	data_in,
		long	soft_decision_level,
		smart_array< long >	viterbi_input
	)

16-QAM data demapping

Author:

Tony Kirke

void SPUC::qam64_soft_decision	(	complex< long >	data_in,
		long	soft_decision_level,
		smart_array< long >	viterbi_input
	)

64-QAM data demapping

Author:

Tony Kirke

void SPUC::qam_data_demap	(	long	rate_index,
		complex< long >	data_in,
		long	soft_decision_level,
		smart_array< long >	viterbi_input
	)

Soft-decision QAM Demapper (used in 802.11A).

Returns an array of soft decision bits, array size is dependant on modulation type

This de-maps the QAM used in 802.11A

template<class T>

T SPUC::qpsk_dd_phase	(	complex< T >	curr,
		complex< T >	hard_data
	)

Decision directed carrier phase discriminator for QPSK.

Runs at the symbol rate Curr - current symbol Hard_data - Hard decision for current symbol

Author:

Tony Kirke

template<class T>

T SPUC::qpsk_quadricorrelator	(	complex< T >	hard_data,
		complex< T >	prev
	)

Hard_data - Hard decision (complex) data for current symbol Prev - Previous symbol (prior to hard decision)

Author:

Tony Kirke

template<class T>

T SPUC::qpsk_rcfd	(	complex< T >	fmf,
		complex< T >	curr
	)

using the "frequency matched filter" approach derived from the Maximum likelihood principle. see

A Reduced-complexity frequency discriminator derived from the maximum likelihood principle

IEEE Transactions on Communications Oct. 1995

. FMF - output from frequency matched filter (must be done externally) Curr - current sample

Author:

Tony Kirke

void SPUC::qpsk_soft_decision	(	complex< long >	data_in,
		smart_array< long >	viterbi_input
	)

QPSK data demapping.

Author:

Tony Kirke

template<class T>

void SPUC::raised_cosine	(	fir_coeff< T > &	rcfir,
		float_type	alpha,
		int	rate
	)

Raised Cosine functions.

Author:

Tony Kirke

template<class T>

void SPUC::root_raised_cosine_quantized	(	fir_coeff< T > &	rcfir,
		float_type	alpha,
		int	rate,
		int	bits,
		float_type	scale
	)

Root Raised Cosine functions.

Author:

Tony Kirke

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