87 lines
2.4 KiB
Matlab
Executable File
87 lines
2.4 KiB
Matlab
Executable File
function plot_complex_sig(x,samples_per_symbol,Nmax,plot_style)
|
|
% plot_complex_sig(x) plots a one-dimensional complex signal as points
|
|
% in 3-D space : x-axis is the sample (time) axis, y-axis is the real part,
|
|
% and z-axis the imaginary part
|
|
%
|
|
% plot_complex_sig(x,samples_per_symbol) plots all samples in blue and
|
|
% one sample per symbol in red.
|
|
%
|
|
% plot_complex_sig(x,samples_per_symbol,Nmax) only plots the first Nmax
|
|
% samples.
|
|
%
|
|
% plot_complex_sig(x,samples_per_symbol,Nmax,'arrows') use arrows from
|
|
% (i_sample,0,0) instead of points to represent samples.
|
|
%
|
|
% version compatible with Simulink Version 7.3 (R2009a)
|
|
|
|
%% process function arguments and perform various tests on function
|
|
|
|
nargchk(1,3,nargin);
|
|
|
|
if nargin<2
|
|
samples_per_symbol = 1;
|
|
end
|
|
|
|
if (isstruct(x))
|
|
if(~isfield(x,'signals'))
|
|
error('unsupported data type')
|
|
else
|
|
if (x.signals.dimensions ~= 1)
|
|
error('does not support multidimensional signals')
|
|
else
|
|
vals = x.signals.values;
|
|
end
|
|
end
|
|
else % should be array
|
|
vals = x;
|
|
end
|
|
|
|
if nargin<3
|
|
Nmax=length(vals);
|
|
end
|
|
|
|
if nargin<4
|
|
plot_style = 'points';
|
|
end
|
|
|
|
if (~isnumeric(vals))
|
|
error('unsupported data type')
|
|
elseif (isreal(vals))
|
|
error('numbers are not complex')
|
|
end
|
|
|
|
if ((samples_per_symbol < 1) || ~(round(samples_per_symbol)==samples_per_symbol))
|
|
error('samples_per_symbol must be a strictly positive integer')
|
|
end
|
|
|
|
if ~strcmp(plot_style,'points') && ~strcmp(plot_style,'arrows')
|
|
error('possible values for plot plot_style are : "points" and "arrows"')
|
|
end
|
|
%% function implementation
|
|
|
|
sel=(1:Nmax)';
|
|
abs_max = max(abs(x(sel)));
|
|
if (samples_per_symbol==1)
|
|
if strcmp(plot_style,'points')
|
|
plot3(sel,real(vals(sel)),imag(vals(sel)),'.');
|
|
elseif strcmp(plot_style,'arrows')
|
|
quiver3(sel,zeros(size(sel)),zeros(size(sel)),zeros(size(sel)),real(vals(sel)),imag(vals(sel)),0);
|
|
end
|
|
else
|
|
plot3(sel,real(vals(sel)),imag(vals(sel)),'.');
|
|
hold on
|
|
sel= (1:samples_per_symbol:Nmax)';
|
|
if strcmp(plot_style,'points')
|
|
plot3(sel,real(vals(sel)),imag(vals(sel)),'.r');
|
|
elseif strcmp(plot_style,'arrows')
|
|
quiver3(sel,zeros(size(sel)),zeros(size(sel)),zeros(size(sel)),real(vals(sel)),imag(vals(sel)),0);
|
|
end
|
|
hold off
|
|
end
|
|
ylim([-abs_max,abs_max])
|
|
zlim([-abs_max,abs_max])
|
|
axis vis3d
|
|
grid on
|
|
xlabel('samples');
|
|
ylabel('real');
|
|
zlabel('imag'); |