diff options
Diffstat (limited to 'gnuradio-core/src/lib/general')
| -rw-r--r-- | gnuradio-core/src/lib/general/gr_cpm.cc | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gnuradio-core/src/lib/general/gr_cpm.cc b/gnuradio-core/src/lib/general/gr_cpm.cc index a00526b52..94a428c58 100644 --- a/gnuradio-core/src/lib/general/gr_cpm.cc +++ b/gnuradio-core/src/lib/general/gr_cpm.cc @@ -28,6 +28,10 @@ #include <cfloat> #include <gr_cpm.h> +//gives us erf on compilers without it +#include <boost/math/special_functions/erf.hpp> +namespace bm = boost::math; + #ifndef M_TWOPI # define M_TWOPI (2*M_PI) #endif @@ -178,8 +182,8 @@ generate_cpm_gaussian_taps(unsigned samples_per_sym, unsigned L, double bt) double alpha = 5.336446256636997 * bt; for (unsigned i = 0; i < samples_per_sym * L; i++) { double k = i - Ls/2; // Causal to acausal - taps_d[i] = (erf(alpha * (k / samples_per_sym + 0.5)) - - erf(alpha * (k / samples_per_sym - 0.5))) + taps_d[i] = (bm::erf(alpha * (k / samples_per_sym + 0.5)) - + bm::erf(alpha * (k / samples_per_sym - 0.5))) * 0.5 / samples_per_sym; taps[i] = (float) taps_d[i]; } |