IT++

IT++ is a C++ library of classes and functions for linear algebra, numerical optimization, signal processing, communications, and statistics.IT++, Free Software Directory, Free Software Foundation, http://directory.fsf.org It is being developed by researchers in these areas and is widely used by researchers, both in the communications industry and universities.Bogdan Cristea. 2009. Turbo receivers with IT++. In Proceedings of the 2nd International Conference on Simulation Tools and Techniques (Simutools '09). ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering), ICST, Brussels, Belgium, Belgium, de Lima, C.H.M.; Stancanelli, E.M.G.; Rodrigues, E.B.; da S. Maciel, J.M.; Cavalcanti, F.R.P., A software development framework based on C++ OOP language for link-level simulation tools, Telecommunications Symposium, 2006 International, Fortaleza, Brazil, The IT++ library originates from the former Department of Information Theory at the Chalmers University of Technology, Gothenburg, Sweden.

The kernel of the IT++ library is templated vector and matrix classes, and a set of accompanying functions. Such a kernel makes IT++ library similar to Matlab/Octave. For increased functionality, speed and accuracy, IT++ can make extensive use of existing free and open source libraries, especially BLAS, LAPACK and FFTW libraries. Instead of BLAS and LAPACK, some optimized platform-specific libraries can be used as well, i.e.: ATLAS (Automatically Tuned Linear Algebra Software) - includes optimised BLAS, CBLAS and a limited set of LAPACK routines; MKL (Intel Math Kernel Library) - includes all required BLAS, CBLAS, LAPACK and FFT routines (FFTW not required); ACML (AMD Core Math Library) - includes BLAS, LAPACK and FFT routines (FFTW not required).

It is possible to compile and use IT++ without any of the above-listed libraries, but the functionality will be reduced. IT++ works on Linux, Solaris, Windows (with Cygwin, MinGW/MSYS, or Microsoft Visual C++) and OS X operating systems.

Example Here is a trivial example demonstrating the IT++ functionality similar to Matlab/Octave, import <itpp/itbase.h>; import std;

using itpp::Mat; using itpp::Vec;

int main() { Vec<double> a = itpp::linspace(0.0, 2.0, 2); Vec<double> b("1.0 2.0"); Vec<double> c = 2 * a + 3 * b; std::println("c = {}", c);

Mat<double> A("1.0 2.0; 3.0 4.0"); Mat<double> B("0.0 1.0; 1.0 0.0"); Mat<double> C = A * B + 2 * A; std::println("C = {}", C); std::println("inverse of B = {}", itpp::inv(B));

return 0; }

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