AFF3CT
A Fast Forward Error Correction Tool (AFF3CT) is an Open-source software (MIT license) dedicated to the Forward Error Correction (FEC or channel coding) simulations. It is written in C++11 and it supports a large range of codes: from the well-spread Turbo codes[1] to the very new Polar codes[2][3][4] including the Low-Density Parity-Check (LDPC) codes. A particular emphasis is given to the simulation throughput performance (hundreds of Mb/s on today's CPUs) and the portability of the code.
AFF3CT can also be used as a library to create dedicated simulations or directly in SDR contexts.
Example[edit]
Here is a simple code example with the AFF3CT library:
#include <iostream>
// AFF3CT headers
#include <Tools/Perf/MIPP/mipp.h>
#include <Tools/Display/Frame_trace/Frame_trace.hpp>
// AFF3CT headers
#include <Module/Source/Random/Source_random.hpp>
#include <Module/Encoder/NO/Encoder_NO.hpp>
#include <Module/Modulator/BPSK/Modulator_BPSK.hpp>
#include <Module/Channel/Additive/AWGN/Standard/Channel_AWGN_std_LLR.hpp>
#include <Module/Decoder/NO/Decoder_NO.hpp>
int main(int argc, char** argv)
{
constexpr int size = 16;
constexpr double sigma = 1.f;
// buffers
mipp::vector<int > refs (size);
mipp::vector<int > bits (size);
mipp::vector<float> symbs(size);
mipp::vector<float> LLRs (size);
// AFF3CT objects
aff3ct::module::Source_random<> source (size );
aff3ct::module::Encoder_NO<> encoder (size, size );
aff3ct::module::Modulator_BPSK<> modulator(size, sigma);
aff3ct::module::Channel_AWGN_std_LLR<> channel (size, sigma);
aff3ct::module::Decoder_NO<> decoder (size, size );
aff3ct::tools ::Frame_trace<> trace (size );
// run a small simulation chain
source .generate ( refs );
encoder .encode (refs, bits );
modulator.modulate (bits, symbs);
channel .add_noise (symbs, LLRs );
modulator.demodulate (LLRs, LLRs );
decoder .hard_decode(LLRs, bits );
// display the resulting bits
std::cout << "Hello World AFF3CT!" << std::endl;
std::cout << "Input bits:" << std::endl;
trace.display_bit_vector(refs);
std::cout << "Output bits:" << std::endl;
trace.display_bit_vector(bits, refs);
return 0;
}
See also[edit]
References[edit]
- ↑ Cassagne, A.; Tonnellier, T.; Leroux, C.; Gal, B. Le; Aumage, O.; Barthou, D. (2016-09-01). "Beyond Gbps Turbo decoder on multi-core CPUs". 2016 9th International Symposium on Turbo Codes and Iterative Information Processing (ISTC): 136–140. doi:10.1109/ISTC.2016.7593092.
- ↑ Cassagne, Adrien; Gal, Bertrand Le; Leroux, Camille; Aumage, Olivier; Barthou, Denis (2015-09-09). Languages and Compilers for Parallel Computing. Springer, Cham. pp. 303–317. doi:10.1007/978-3-319-29778-1_19. Search this book on
- ↑ Cassagne, A.; Aumage, O.; Leroux, C.; Barthou, D.; Gal, B. Le (2016-08-01). "Energy consumption analysis of software polar decoders on low power processors". 2016 24th European Signal Processing Conference (EUSIPCO): 642–646. doi:10.1109/EUSIPCO.2016.7760327.
- ↑ Gal, B. Le; Leroux, C.; Jego, C. (2015-01-01). "Multi-Gb/s Software Decoding of Polar Codes". IEEE Transactions on Signal Processing. 63 (2): 349–359. doi:10.1109/TSP.2014.2371781. ISSN 1053-587X.
External links[edit]
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