diff options
Diffstat (limited to 'gr-digital/include/gnuradio/digital/costas_loop_cc.h')
| -rw-r--r-- | gr-digital/include/gnuradio/digital/costas_loop_cc.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gr-digital/include/gnuradio/digital/costas_loop_cc.h b/gr-digital/include/gnuradio/digital/costas_loop_cc.h index d924d969b7..ff5b9b993a 100644 --- a/gr-digital/include/gnuradio/digital/costas_loop_cc.h +++ b/gr-digital/include/gnuradio/digital/costas_loop_cc.h @@ -1,6 +1,6 @@ /* -*- c++ -*- */ /* - * Copyright 2006,2011,2012 Free Software Foundation, Inc. + * Copyright 2006,2011,2012,2014 Free Software Foundation, Inc. * * This file is part of GNU Radio * @@ -58,6 +58,9 @@ namespace gr { * The Costas loop can have two output streams: * \li stream 1 (required) is the baseband I and Q; * \li stream 2 (optional) is the normalized frequency of the loop + * + * There is a single optional message input: + * \li noise: A noise floor estimate used to calculate the SNR of a sample. */ class DIGITAL_API costas_loop_cc : virtual public sync_block, @@ -72,8 +75,10 @@ namespace gr { * * \param loop_bw internal 2nd order loop bandwidth (~ 2pi/100) * \param order the loop order, either 2, 4, or 8 + * \param use_snr Use or ignore SNR estimates (from noise message port) + * in measurements; also uses tanh instead of slicing. */ - static sptr make(float loop_bw, int order); + static sptr make(float loop_bw, int order, bool use_snr=false); /*! * Returns the current value of the loop error. |