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Code Issues Releases Wiki Activity

Fixing documentation

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This commit is contained in:
Carles Fernandez 2015-07-16 18:54:57 +02:00
parent 392bb64ad9
commit 5d22d90cc0
3 changed files with 41 additions and 40 deletions
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9
src/algorithms/signal_source/adapters/two_bit_cpx_file_signal_source.cc
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@ -1,9 +1,8 @@
/*! /*!
* \file nsr_file_signal_source.cc * \file two_bit_cpx_file_signal_source.cc
* \brief Implementation of a class that reads signals samples from a NSR 2 bits sampler front-end file * \brief Implementation of a class that reads signals samples from a 2 bit complex sampler front-end file
* and adapts it to a SignalSourceInterface. More information about the front-end here * and adapts it to a SignalSourceInterface.
* http://www.ifen.com/products/sx-scientific-gnss-solutions/nsr-software-receiver.html * \author Javier Arribas, 2015 jarribas(at)cttc.es
* \author Javier Arribas, 2013 jarribas(at)cttc.es
* *
* ------------------------------------------------------------------------- * -------------------------------------------------------------------------
* *

9
src/algorithms/signal_source/adapters/two_bit_cpx_file_signal_source.h
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@ -1,9 +1,8 @@
/*! /*!
* \file nsr_file_signal_source.h * \file two_bit_cpx_file_signal_source.h
* \brief Implementation of a class that reads signals samples from a NSR 2 bits sampler front-end file * \brief Interface of a class that reads signals samples from a 2 bit complex sampler front-end file
* and adapts it to a SignalSourceInterface. More information about the front-end here * and adapts it to a SignalSourceInterface.
* http://www.ifen.com/products/sx-scientific-gnss-solutions/nsr-software-receiver.html * \author Javier Arribas, 2015 jarribas(at)cttc.es
* \author Javier Arribas, 2013 jarribas(at)cttc.es
* *
* This class represents a file signal source. * This class represents a file signal source.
* *

63
src/algorithms/signal_source/gnuradio_blocks/unpack_byte_2bit_cpx_samples.cc
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@ -1,7 +1,11 @@
/*! /*!
* \file unpack_byte_2bit_cpx_samples.cc * \file unpack_byte_2bit_cpx_samples.cc
* *
* \brief Unpacks byte samples to NSR 2 bits samples * \brief Unpacks byte samples to 2 bits complex samples.
* Packing Order
* Most Significant Nibble - Sample n
* Least Significant Nibble - Sample n+1
* Packing order in Nibble Q1 Q0 I1 I0
* \author Javier Arribas jarribas (at) cttc.es * \author Javier Arribas jarribas (at) cttc.es
* ------------------------------------------------------------------------- * -------------------------------------------------------------------------
* *
@ -54,8 +58,8 @@ unpack_byte_2bit_cpx_samples::~unpack_byte_2bit_cpx_samples()
{} {}
int unpack_byte_2bit_cpx_samples::work(int noutput_items, int unpack_byte_2bit_cpx_samples::work(int noutput_items,
gr_vector_const_void_star &input_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items) gr_vector_void_star &output_items)
{ {
const signed char *in = (const signed char *)input_items[0]; const signed char *in = (const signed char *)input_items[0];
short *out = (short*)output_items[0]; short *out = (short*)output_items[0];
@ -65,40 +69,39 @@ int unpack_byte_2bit_cpx_samples::work(int noutput_items,
for(int i = 0; i < noutput_items/4; i++) for(int i = 0; i < noutput_items/4; i++)
{ {
// Read packed input sample (1 byte = 2 complex samples) // Read packed input sample (1 byte = 2 complex samples)
//* Packing Order //* Packing Order
//* Most Significant Nibble - Sample n //* Most Significant Nibble - Sample n
//* Least Significant Nibble - Sample n+1 //* Least Significant Nibble - Sample n+1
//* Packing order in Nibble Q1 Q0 I1 I0 //* Packing order in Nibble Q1 Q0 I1 I0
//normal //normal
// signed char c = in[i]; // signed char c = in[i];
// //Q[n] // //Q[n]
// sample.two_bit_sample = (c>>6) & 3; // sample.two_bit_sample = (c>>6) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1); // out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n] // //I[n]
// sample.two_bit_sample = (c>>4) & 3; // sample.two_bit_sample = (c>>4) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1); // out[n++] = (2*(short)sample.two_bit_sample+1);
// //Q[n+1] // //Q[n+1]
// sample.two_bit_sample = (c>>2) & 3; // sample.two_bit_sample = (c>>2) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1); // out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n+1] // //I[n+1]
// sample.two_bit_sample = c & 3; // sample.two_bit_sample = c & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1); // out[n++] = (2*(short)sample.two_bit_sample+1);
//I/Q swap //I/Q swap
signed char c = in[i]; signed char c = in[i];
//I[n] //I[n]
sample.two_bit_sample = (c>>4) & 3; sample.two_bit_sample = (c >> 4) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1); out[n++] = (2*(short)sample.two_bit_sample + 1);
//Q[n] //Q[n]
sample.two_bit_sample = (c>>6) & 3; sample.two_bit_sample = (c >> 6) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1); out[n++] = (2*(short)sample.two_bit_sample + 1);
//I[n+1] //I[n+1]
sample.two_bit_sample = c & 3; sample.two_bit_sample = c & 3;
out[n++] = (2*(short)sample.two_bit_sample+1); out[n++] = (2*(short)sample.two_bit_sample + 1);
//Q[n+1] //Q[n+1]
sample.two_bit_sample = (c>>2) & 3; sample.two_bit_sample = (c >> 2) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1); out[n++] = (2*(short)sample.two_bit_sample + 1);
} }
return noutput_items; return noutput_items;
} }