fun::BitInterleave Struct Reference

The BitInterleave struct. More...

#include <interleaver.h>

Public Member Functions
	BitInterleave (int ncarriers, int nbits)
unsigned int	index (unsigned int k)
void	fill (std::vector< unsigned int > &v, bool inverse)

Public Attributes
unsigned int	d_bpsc
unsigned int	d_cbps

Static Public Attributes
static const int	d_num_chunks = 16

Detailed Description

The BitInterleave struct.

This struct sets up the interleaving map based on the the number of coded bits per symbol

Definition at line 56 of file interleaver.h.

Constructor & Destructor Documentation

fun::BitInterleave::BitInterleave ( int  ncarriers, int  nbits  )

inline

Definition at line 61 of file interleaver.h.

                                                :
            d_bpsc(nbits),
            d_cbps(nbits * ncarriers)
        {}

Member Function Documentation

void fun::BitInterleave::fill ( std::vector< unsigned int > &  v, bool  inverse  )

inline

Definition at line 77 of file interleaver.h.

References d_cbps, and index().

Referenced by fun::interleaver::deinterleave(), and fun::interleaver::interleave().

        {
          v.resize(d_cbps);
          if (!inverse)
          {
              for (unsigned int i = 0; i < d_cbps; ++i)
              {
                  v[i] = index(i);
              }
          } 
          else
          {
              for (unsigned int i = 0; i < d_cbps; ++i)
              {
                  v[index(i)] = i;
              }
          }
        }

unsigned int fun::BitInterleave::index ( unsigned int  k)

inline

Definition at line 66 of file interleaver.h.

References d_bpsc, d_cbps, and d_num_chunks.

Referenced by fill().

        {
            // see 17.3.5.6 in 802.11a-1999, floor is implicit
            assert (k < d_cbps);
            unsigned int s = std::max(d_bpsc / 2, (unsigned int)1);
            unsigned int i = (d_cbps / d_num_chunks) * (k % d_num_chunks) + (k / d_num_chunks);
            unsigned int j = s * (i / s) + (i + d_cbps - (d_num_chunks * i / d_cbps)) % s;
            assert (j < d_cbps);
            return j;
        }

Member Data Documentation

unsigned int fun::BitInterleave::d_bpsc

Definition at line 57 of file interleaver.h.

Referenced by index().

unsigned int fun::BitInterleave::d_cbps

Definition at line 58 of file interleaver.h.

Referenced by fill(), and index().

const int fun::BitInterleave::d_num_chunks = 16

static

Definition at line 59 of file interleaver.h.

Referenced by index().

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

• /home/benjamin/Documents/fun_ofdm/src/interleaver.h