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Commit bf1f35cb authored by Daniel van der Schuur's avatar Daniel van der Schuur
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Copied Matlab dir from SVN. Added readme.md

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matlab/data/run_pfir_coeff_m_bypass_16taps_1024points_16b_polyphase3.dat 0 → 100644
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matlab/data/run_pfir_coeff_m_incrementing_8taps_64points_16b.dat 0 → 100644
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matlab/data/run_pfir_coeff_m_lofar_subband_16taps_1024points_16b.dat 0 → 100644
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matlab/delay_tracking_pfb.m 0 → 100644
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matlab/ds.m 0 → 100644
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%-----------------------------------------------------------------------------
%
% Copyright (C) 2016
% ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
% P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
%
% 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 3 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, see <http://www.gnu.org/licenses/>.
%
%-----------------------------------------------------------------------------
% Author: E. Kooistra, 2016
%
% Purpose : Doppler frequency shift (DS) per block of data
% Description :
% Apply a frequency shift to the input data using a complex phasor.
% All input data is for the same time ctrl.t so the same frequency
% shift is applied to the whole block.
function [state, out_data] = ds(ctrl, in_data)
% Data processing
out_data = exp(j*2*pi*ctrl.shift_freq*ctrl.t) * in_data;
% Keep state next call
state = ctrl;
state.t = ctrl.t + ctrl.block_period;
matlab/dt.m 0 → 100644
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%-----------------------------------------------------------------------------
%
% Copyright (C) 2016
% ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>
% P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
%
% 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 3 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, see <http://www.gnu.org/licenses/>.
%
%-----------------------------------------------------------------------------
% Author: E. Kooistra, 2016
%
% Purpose : Delay tracking (DT) per block of data
% Description :
%
% Time -->|0 |N |2N |
% Input: |pprev |prev |this |
% |ctrl.buffer |data |
% |buffer |
% |abcd ... xyz|abcd ... xyz|abcd ... xyz|
%
% Output: |prev |this |next
% DT= 0: |abcd ... xyz|abcd ... xyz|
% DT=+1: |zabc ... xy|zabc ... xy|
% DT=+2: |yzab ... x|yzab ... x|
% DT=-1: |bcd ... yza|bcd ... yza|
% DT=+2: |cd ... zab|cd ... zab|
%
% Remarks:
% * With a buffer of two blocks, so 2N, the maximum DT range is -N to + N.
% * Index = Time + 1, because for Matlab index starts at 1 instead of at 0.
function [state, out_data] = dt(ctrl, in_data)
% Data processing
N = ctrl.block_size;
% Append input data to the buffer
buffer = [ctrl.buffer in_data];
% Extract output data for given DT
out_data = buffer(1 + (N:2*N-1) - ctrl.dt);
% Keep buffer for next call
state = ctrl;
state.buffer = buffer(1 + (N:3*N-1));
matlab/fft_sinus_noise_scaling.m 0 → 100644
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