GNU Radio 3.6.5 C++ API

digital_clock_recovery_mm_ff Class Reference

Mueller and Müller (M&M) based clock recovery block with float input, float output. More...

#include <digital_clock_recovery_mm_ff.h>

Inheritance diagram for digital_clock_recovery_mm_ff:
gr_block gr_basic_block gr_msg_accepter gruel::msg_accepter

List of all members.

Public Member Functions

 ~digital_clock_recovery_mm_ff ()
void forecast (int noutput_items, gr_vector_int &ninput_items_required)
 Estimate input requirements given output request.
int general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
 compute output items from input items
float mu () const
float omega () const
float gain_mu () const
float gain_omega () const
void set_gain_mu (float gain_mu)
void set_gain_omega (float gain_omega)
void set_mu (float mu)
void set_omega (float omega)

Protected Member Functions

 digital_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu, float omega_relative_limit)

Friends

DIGITAL_API
digital_clock_recovery_mm_ff_sptr 
digital_make_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu, float omega_relative_limit)

Detailed Description

Mueller and Müller (M&M) based clock recovery block with float input, float output.

This implements the Mueller and Müller (M&M) discrete-time error-tracking synchronizer.

See "Digital Communication Receivers: Synchronization, Channel Estimation and Signal Processing" by Heinrich Meyr, Marc Moeneclaey, & Stefan Fechtel. ISBN 0-471-50275-8.


Constructor & Destructor Documentation

digital_clock_recovery_mm_ff::~digital_clock_recovery_mm_ff ( )
digital_clock_recovery_mm_ff::digital_clock_recovery_mm_ff ( float  omega,
float  gain_omega,
float  mu,
float  gain_mu,
float  omega_relative_limit 
) [protected]

Member Function Documentation

void digital_clock_recovery_mm_ff::forecast ( int  noutput_items,
gr_vector_int ninput_items_required 
) [virtual]

Estimate input requirements given output request.

Parameters:
noutput_itemsnumber of output items to produce
ninput_items_requirednumber of input items required on each input stream

Given a request to product noutput_items, estimate the number of data items required on each input stream. The estimate doesn't have to be exact, but should be close.

Reimplemented from gr_block.

float digital_clock_recovery_mm_ff::gain_mu ( ) const [inline]
float digital_clock_recovery_mm_ff::gain_omega ( ) const [inline]
int digital_clock_recovery_mm_ff::general_work ( int  noutput_items,
gr_vector_int ninput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items 
) [virtual]

compute output items from input items

Parameters:
noutput_itemsnumber of output items to write on each output stream
ninput_itemsnumber of input items available on each input stream
input_itemsvector of pointers to the input items, one entry per input stream
output_itemsvector of pointers to the output items, one entry per output stream
Returns:
number of items actually written to each output stream, or -1 on EOF. It is OK to return a value less than noutput_items. -1 <= return value <= noutput_items

general_work must call consume or consume_each to indicate how many items were consumed on each input stream.

Reimplemented from gr_block.

float digital_clock_recovery_mm_ff::mu ( ) const [inline]
float digital_clock_recovery_mm_ff::omega ( ) const [inline]
void digital_clock_recovery_mm_ff::set_gain_mu ( float  gain_mu) [inline]
void digital_clock_recovery_mm_ff::set_gain_omega ( float  gain_omega) [inline]
void digital_clock_recovery_mm_ff::set_mu ( float  mu) [inline]
void digital_clock_recovery_mm_ff::set_omega ( float  omega) [inline]

Friends And Related Function Documentation

DIGITAL_API digital_clock_recovery_mm_ff_sptr digital_make_clock_recovery_mm_ff ( float  omega,
float  gain_omega,
float  mu,
float  gain_mu,
float  omega_relative_limit 
) [friend]

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