IT++ Convolutional encoder

GNU Radio
1

I have the next code working, in the firsts seconds I have erroneous
bits, after 10 seconds I don’t have any error… another thing if I put
Max Number of Output = 0 always have a ber of 40%…

Umbrella_encodconv_vff::Umbrella_encodconv_vff (const std::vector
&val1, int val2, int val3)
: gr_sync_block (“encodconv_vff”,
gr_make_io_signature (1, 1, sizeof (float) * val3),
gr_make_io_signature (1, 1, sizeof (float) * val3 *
val1.size()))
{
polsize = val1.size();
cl = val2;
pz = val3;

 for (int i = 0; i < 0x100; i++){
     polynom[i] = i;
 }

 unsigned int size = std::min((size_t) 0x100, val1.size());

 for (unsigned int i = 0; i < size; i++){
     polynom[i] = val1[i];
 }

 // -- Channel code parameters --

 itpp::ivec generator(polsize);

 for (int i = 0; i < polsize; i++){
     generator[i] = polynom[i];
 }

 code.set_generator_polynomials(generator, cl);

}

int
Umbrella_encodconv_vff::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float *) input_items[0];
float *out = (float *) output_items[0];

 itpp::bvec tempin(pz * sizeof(float));
 itpp::bvec tempout(pz * polsize * sizeof(float));

     for (int j = 0; j < (pz * sizeof(float)); j++){
         tempin[j] = in[j];
     }

     code.encode_tailbite(tempin, tempout);

     for (int k = 0; k < (pz * polsize * sizeof(float)); k++){
         out[k] = tempout[k];
     }

 // Tell runtime system how many output items we produced.
 return noutput_items;

}