diff options
Diffstat (limited to 'gr-blocks/lib/rms_cf_impl.cc')
| -rw-r--r-- | gr-blocks/lib/rms_cf_impl.cc | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/gr-blocks/lib/rms_cf_impl.cc b/gr-blocks/lib/rms_cf_impl.cc index d956b45f1a..9b2c031e10 100644 --- a/gr-blocks/lib/rms_cf_impl.cc +++ b/gr-blocks/lib/rms_cf_impl.cc @@ -38,12 +38,12 @@ namespace gr { (new rms_cf_impl(alpha)); } - rms_cf_impl::rms_cf_impl (double alpha) + rms_cf_impl::rms_cf_impl(double alpha) : gr_sync_block("rms_cf", gr_make_io_signature(1, 1, sizeof(gr_complex)), - gr_make_io_signature(1, 1, sizeof(float))), - d_iir(alpha) + gr_make_io_signature(1, 1, sizeof(float))) { + set_alpha(alpha); } rms_cf_impl::~rms_cf_impl() @@ -53,7 +53,9 @@ namespace gr { void rms_cf_impl::set_alpha(double alpha) { - d_iir.set_taps(alpha); + d_alpha = alpha; + d_beta = 1 - d_alpha; + d_avg = 0; } int @@ -66,8 +68,8 @@ namespace gr { for(int i = 0; i < noutput_items; i++) { double mag_sqrd = in[i].real()*in[i].real() + in[i].imag()*in[i].imag(); - double f = d_iir.filter(mag_sqrd); - out[i] = sqrt(f); + d_avg = d_beta*d_avg + d_alpha*mag_sqrd; + out[i] = sqrt(d_avg); } return noutput_items; |