abcd_free_space.m


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function fs_abcd = abcd_free_space( distance)
% abcd matrix for the free space region of given distance
if (length(distance) == 1)
    fs_abcd=[1, distance; 0,1];
else
    for i=length(distance):-1:1
        fs_abcd{i}=[1, distance(i); 0,1];
    end
end
end