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C++ library of mathematical, signal processing, speech processing, and communications classes and functions.

IT++ is a C++ library of mathematical, signal processing, speech processing, and communications classes and functions. It is being developed by researchers in these areas and is widely used by researchers, both in the communications industry and universities. Since 2004, IT++ is also being developed as a part of the European Network of Excellence in Wireless Communications (NEWCOM). The kernel of the IT++ library are templated vector and matrix classes, and lots of functions for vectors and matrices. Such a kernel makes IT++ library similar to Matlab. IT++ makes an extensive use of existing free and open source libraries (but not only) for increased functionality, speed and accuracy. In particular BLAS, CBLAS, LAPACK and FFTW libraries might be used. Instead of NetLib's reference 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. The IT++ library originates from the former department of Information Theory at the Chalmers University of Technology, Gothenburg, Sweden. Because the library is coded in C++, the name IT++ seemed like a good idea at the time. While departments come and go, IT++ have developed a life of its' own and is now released under the terms of the GNU General Public License (GPL) for you to enjoy. IT++ should work on GNU/Linux, Sun Solaris, Microsoft Windows (with Cygwin, MinGW/MSYS, or Microsoft Visual C++ .NET) and Mac OS X operating systems.


Reference documentation, installation manual, tutorial examples and more in HTML format



Verified by

Verified on


Verified by

Kelly Hopkins

Verified on

17 October 2008

Leaders and contributors

Adam Piatyszek Maintainer
Tobias Ringstrom Contributor
Sean Finney Contributor
Francois Cayre Contributor
Tony Ottosson Maintainer
Tobias Tynderfeldt Contributor
Steve Peters Contributor
Jonas Samuelsson Contributor
Anders Persson Contributor
Zbigniew Dlugaszewski Contributor
Svante Signell Contributor
Kenneth Hilmersson Contributor
Andy Panov Contributor
Teddy Furon Contributor
Krister Norlund Contributor
Bjorn Furugard Contributor
Thomas Lemaire Contributor
Peter Klotz Contributor
Erik Stoy Contributor

Resources and communication

AudienceResource typeURI
DeveloperVCS Repository Webview
Bug TrackingVCS Repository Webview

Software prerequisites

Required to buildLAPACK
Weak prerequisiteACML
Required to buildFFTW
Required to buildBLAS
Required to buildCBLAS
Weak prerequisiteMKL
Weak prerequisiteATLAS

This entry (in part or in whole) was last reviewed on 26 February 2017.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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