gr_costas_loop_cc Class Reference
[Signal Clock Synchronization]

Carrier tracking PLL for QPSK

input: complex; output: complex
The Costas loop can have two output streams: stream 1 is the baseband I and Q; stream 2 is the normalized frequency of the loop. More...

#include <gr_costas_loop_cc.h>

Inheritance diagram for gr_costas_loop_cc:

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Collaboration diagram for gr_costas_loop_cc:

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List of all members.

Public Member Functions
void	set_alpha (float alpha)
	set the first order gain
float	alpha () const
	get the first order gain
void	set_beta (float beta)
	set the second order gain
float	beta () const
	get the second order gain
int	work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
	just like gr_block::general_work, only this arranges to call consume_each for you
Friends
gr_costas_loop_cc_sptr	gr_make_costas_loop_cc (float alpha, float beta, float max_freq, float min_freq, int order) throw (std::invalid_argument)

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Detailed Description

Carrier tracking PLL for QPSK

input: complex; output: complex
The Costas loop can have two output streams: stream 1 is the baseband I and Q; stream 2 is the normalized frequency of the loop.

order must be 2 or 4.

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Member Function Documentation

float gr_costas_loop_cc::alpha

(

)

const [inline]

get the first order gain

float gr_costas_loop_cc::beta

(

)

const [inline]

get the second order gain

void gr_costas_loop_cc::set_alpha

(

float

alpha

)

set the first order gain

Parameters:

alpha

void gr_costas_loop_cc::set_beta

(

float

beta

)

set the second order gain

Parameters:

beta

int gr_costas_loop_cc::work	(	int	noutput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)			[virtual]

just like gr_block::general_work, only this arranges to call consume_each for you

The user must override work to define the signal processing code

Implements gr_sync_block.

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Friends And Related Function Documentation

gr_costas_loop_cc_sptr gr_make_costas_loop_cc	(	float	alpha,
		float	beta,
		float	max_freq,
		float	min_freq,
		int	order
	)			throw (std::invalid_argument) [friend]

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

• gr_costas_loop_cc.h