mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2025-03-21 19:07:04 +00:00
Code Issues Releases Wiki Activity

Fixing documentation

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/algorithms/signal_source/adapters/two_bit_cpx_file_signal_source.cc
View File

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

9
src/algorithms/signal_source/adapters/two_bit_cpx_file_signal_source.h
View File

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

63
src/algorithms/signal_source/gnuradio_blocks/unpack_byte_2bit_cpx_samples.cc
View File

@ -1,7 +1,11 @@
/*!
* \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
* -------------------------------------------------------------------------
*
@ -54,8 +58,8 @@ unpack_byte_2bit_cpx_samples::~unpack_byte_2bit_cpx_samples()
{}
int unpack_byte_2bit_cpx_samples::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const signed char *in = (const signed char *)input_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++)
{
// Read packed input sample (1 byte = 2 complex samples)
//* Packing Order
//* Most Significant Nibble - Sample n
//* Least Significant Nibble - Sample n+1
//* Packing order in Nibble Q1 Q0 I1 I0
//normal
// signed char c = in[i];
// //Q[n]
// sample.two_bit_sample = (c>>6) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n]
// sample.two_bit_sample = (c>>4) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //Q[n+1]
// sample.two_bit_sample = (c>>2) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n+1]
// sample.two_bit_sample = c & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
//* Packing Order
//* Most Significant Nibble - Sample n
//* Least Significant Nibble - Sample n+1
//* Packing order in Nibble Q1 Q0 I1 I0
//normal
// signed char c = in[i];
// //Q[n]
// sample.two_bit_sample = (c>>6) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n]
// sample.two_bit_sample = (c>>4) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //Q[n+1]
// sample.two_bit_sample = (c>>2) & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
// //I[n+1]
// sample.two_bit_sample = c & 3;
// out[n++] = (2*(short)sample.two_bit_sample+1);
//I/Q swap
//I/Q swap
signed char c = in[i];
//I[n]
sample.two_bit_sample = (c>>4) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1);
sample.two_bit_sample = (c >> 4) & 3;
out[n++] = (2*(short)sample.two_bit_sample + 1);
//Q[n]
sample.two_bit_sample = (c>>6) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1);
sample.two_bit_sample = (c >> 6) & 3;
out[n++] = (2*(short)sample.two_bit_sample + 1);
//I[n+1]
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]
sample.two_bit_sample = (c>>2) & 3;
out[n++] = (2*(short)sample.two_bit_sample+1);
sample.two_bit_sample = (c >> 2) & 3;
out[n++] = (2*(short)sample.two_bit_sample + 1);
}
return noutput_items;
}