46 lines
1.6 KiB
Mathematica
46 lines
1.6 KiB
Mathematica
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function [tau1, tau2] = calcLoopCoef(LBW, zeta, k)
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%Function finds loop coefficients. The coefficients are used then in PLL-s
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%and DLL-s.
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%
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%[tau1, tau2] = calcLoopCoef(LBW, zeta, k)
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%
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% Inputs:
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% LBW - Loop noise bandwidth
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% zeta - Damping ratio
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% k - Loop gain
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%
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% Outputs:
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% tau1, tau2 - Loop filter coefficients
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%--------------------------------------------------------------------------
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% SoftGNSS v3.0
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%
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% Copyright (C) Darius Plausinaitis and Dennis M. Akos
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% Written by Darius Plausinaitis and Dennis M. Akos
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%--------------------------------------------------------------------------
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%This program is free software; you can redistribute it and/or
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%modify it under the terms of the GNU General Public License
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%as published by the Free Software Foundation; either version 2
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%of the License, or (at your option) any later version.
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%
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%This program is distributed in the hope that it will be useful,
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%but WITHOUT ANY WARRANTY; without even the implied warranty of
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%MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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%GNU General Public License for more details.
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%
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%You should have received a copy of the GNU General Public License
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%along with this program; if not, write to the Free Software
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%Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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%USA.
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%--------------------------------------------------------------------------
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%CVS record:
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%$Id: calcLoopCoef.m,v 1.1.2.2 2006/08/14 11:38:22 dpl Exp $
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% Solve natural frequency
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Wn = LBW*8*zeta / (4*zeta.^2 + 1);
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% solve for t1 & t2
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tau1 = k / (Wn * Wn);
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tau2 = 2.0 * zeta / Wn;
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