GNU Radio 3.6.5 C++ API

fpll_btloop_coupling.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2002 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 #ifndef _FPLL_BTLOOP_COUPLING_H_
00023 #define _FPLL_BTLOOP_COUPLING_H_
00024 
00025 /*!
00026  * Magic coupling constant between GrAtscFPLL and GrAtscBitTimingLoop.
00027  * Trust me, you don't want to mess with this.
00028  *
00029  * The agc block buried in the FPLL indirectly sets the level of the input
00030  * to the bit timing loop.  The bit timing loop's convergence properties
00031  * depend on the the mean amplitude of it's input.  This constant ties
00032  * them together such that you can tweak the input level of the bit timing loop
00033  * (somewhat) without screwing everything.
00034  */
00035 
00036 static const float FPLL_BTLOOP_COUPLING_CONST = 3.125;
00037 
00038 #endif /* _FPLL_BTLOOP_COUPLING_H_ */