IT++ Changelog

What's new in IT++ 4.2.0

• New features:
• Added SISO class implementing several algorithms used in turbo decoders/
• receivers
• Added EXIT class for EXIT chart computation of turbo receivers
• Added STC class for the generation of Space Time block codes used in MIMO
• systems with turbo receivers
• Added support for testing IT++ library in Visual Studio 2008. Current approach
• relies on fc (file compare) utility which seems to be available only in Visual
• Studio 2008.
• Added rank() function, which calculates the rank of a matrix by counting
• the number of non-zero singular values. SVD function from LAPACK is thus
• required by this function.
• Added implementation of Gamma(alpha, beta) random number generator. The
• implementation of the Gamma_RNG::sample() function was taken from the R
• statistical language.
• Added qr() overloaded function that does not compute Q. For some tasks
• (triangularization) the Q matrix is not really needed.
• Added missing get(int i) method and operator=(const std::string &) to the
• Mat class
• Added element-wise division operator with a scalar as the dividend to the
• Mat class
• Added missing operator=(const std::string &) to the Vec class
• Added missing operator(bin_list) and get(index_list) methods to the Vec
• class
• Added LDPC_Code::get_ninfo() function, which returns the number of
• information bits in a codeword.
• Added cheb() and chebwin() function to evaluate the coefficients of the
• Dolph-Chebyshev window.
• Modifications:
• License updated from "GPLv2 or later" to "GPLv3 or later"
• Mersenne Twister core random number generator replaced with an improved
• Double-precision SIMD-oriented Fast Mersenne Twister (dSFMT)
• implementation, which is 1.8-2.4 times faster than the previous code.
• Vector string parser reimplemented to support multiple "a:b:c" format
• strings. For instance:
• ivec v = "1:2:5, 6 8 9:-1:0";
• now works. Memory handling is also more efficient, i.e. for the cases when
• "a:b:c" format is not used, memory is allocated only once. This solves
• feature request #2041480.
• Auto-calculate the BCH generator polynomial from (n, t) parameters. With
• this change, the generator polynomial and 'k' (message word length)
• parameters do not have to be explicitly passed to the class constructor.
• Moved portability related definitions from config.h and other header files
• to a common system and architecture dependent header itcompat.h
• Deprecated Mat::set_submatrix(r1,r2,c1,c2,m) function
• Deprecated elem_div(t,v) and set_subvector(i1, i2, &v) function of the Vec
• class
• Removed previously deprecated demodulate_soft_bits_approx() functions
• Removed the deprecated multiplication operator of a column vector and a
• matrix with only one row
• Renamed check_big_endianness() to a simpler is_bigendian()