jens
01b6bb846d
git-svn-id: http://moon:8086/svn/matlab/trunk@136 801c6759-fa7c-4059-a304-17956f83a07c
115 lines
2.4 KiB
Matlab
115 lines
2.4 KiB
Matlab
## Copyright (C) 2020 Jens
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##
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## This program is free software: you can redistribute it and/or modify it
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## under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (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, but
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## 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, see
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## <https://www.gnu.org/licenses/>.
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## -*- texinfo -*-
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## @deftypefn {} {@var{retval} =} mc_pd_eval (@var{input1}, @var{input2})
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##
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## @seealso{}
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## @end deftypefn
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## Author: Jens <jens@orion>
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## Created: 2020-08-07
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#
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# mc_pd_eval3(0.5, 0.0, 10, 0)
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#
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function retval = mc_pd_eval3 (phase, freq, slave_oversample, USE_TRIGON)
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Nc = 10;
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Nspc = 25;
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ka = 0.9;
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klead = 0.4;
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klag = 0.02/slave_oversample;
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lag = 0;
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# Create master
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xm = [];
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for n=1:Nspc,
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for m=1:slave_oversample,
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xm = [xm n/Nspc];
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endfor
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endfor
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x = repmat(xm, 1, Nc);
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N = Nc*Nspc*slave_oversample;
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assert (N == length(x));
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# Create slave
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dfreq = freq/slave_oversample;
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omega = 0;
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sample_count = slave_oversample;
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a = 0.5;
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y(1) = a*cos(2*pi*phase);
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y(2) = a*sin(2*pi*phase);
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for n=1:N,
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if USE_TRIGON
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[phase, y] = process_trigon(y, omega);
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else
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phase = process_linear_phase(phase, omega);
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endif
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_lo(n) = phase;
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perr = phase_det(phase, x(n));
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sample_count = sample_count - 1;
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if sample_count == 0,
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sample_count = slave_oversample;
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else
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perr = 0;
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end
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omega = dfreq - (klag*lag + klead*perr);
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lag = lag + perr;
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_perr(n) = perr;
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_omega(n) = omega;
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end
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function y = jmod(x)
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y = x - fix(x);
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y = y + 0^(0.5 + sign(y)/2);
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endfunction
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function perr = phase_det(lo, x)
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lo = jmod(lo - 0.5);
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perr = jmod(lo - x) - 0.5;
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endfunction
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function phase_out = process_linear_phase(phase_in, omega)
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phase_out = jmod(phase + omega);
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endfunction
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function [phase_out, y] = process_trigon(y, omega)
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b = 2.0 * sin(pi*omega);
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y(1) = y(1) - b*y(2);
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y(2) = y(2) + b*y(1);
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phase_out = jmod(0.5 + 0.5*atan2(y(1), -y(2))/pi);
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endfunction
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close all;
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subplot(3, 1, 1)
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plot(1:N, _lo, 1:N, x); legend('Lo', 'x'); grid
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subplot(3, 1, 2)
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plot(1:N, _omega); legend('f'); grid
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subplot(3, 1, 3)
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plot(1:N, _perr); legend('p'); grid
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endfunction
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