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