GNU Radio 3.4.0 C++ API
gr_ofdm_insert_preamble Class Reference

insert "pre-modulated" preamble symbols before each payload. More...

#include <gr_ofdm_insert_preamble.h>

Inheritance diagram for gr_ofdm_insert_preamble:

List of all members.

Public Member Functions

 ~gr_ofdm_insert_preamble ()
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

Protected Member Functions

 gr_ofdm_insert_preamble (int fft_length, const std::vector< std::vector< gr_complex > > &preamble)

Friends

gr_ofdm_insert_preamble_sptr gr_make_ofdm_insert_preamble (int fft_length, const std::vector< std::vector< gr_complex > > &preamble)

Detailed Description

insert "pre-modulated" preamble symbols before each payload.

 input 1: stream of vectors of gr_complex [fft_length]
          These are the modulated symbols of the payload.
 input 2: stream of char.  The LSB indicates whether the corresponding
          symbol on input 1 is the first symbol of the payload or not.
          It's a 1 if the corresponding symbol is the first symbol,
          otherwise 0.
 N.B., this implies that there must be at least 1 symbol in the payload.
 output 1: stream of vectors of gr_complex [fft_length]
           These include the preamble symbols and the payload symbols.
 output 2: stream of char.  The LSB indicates whether the corresponding
           symbol on input 1 is the first symbol of a packet (i.e., the
           first symbol of the preamble.)   It's a 1 if the corresponding
           symbol is the first symbol, otherwise 0.
 
Parameters:
fft_lengthlength of each symbol in samples.
preamblevector of symbols that represent the pre-modulated preamble.

Constructor & Destructor Documentation

gr_ofdm_insert_preamble::gr_ofdm_insert_preamble ( int  fft_length,
const std::vector< std::vector< gr_complex > > &  preamble 
) [protected]
gr_ofdm_insert_preamble::~gr_ofdm_insert_preamble ( )

Member Function Documentation

int gr_ofdm_insert_preamble::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.

Implements gr_block.


Friends And Related Function Documentation

gr_ofdm_insert_preamble_sptr gr_make_ofdm_insert_preamble ( int  fft_length,
const std::vector< std::vector< gr_complex > > &  preamble 
) [friend]

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