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Equi-angular tight frames

  1. Sep 23, 2015 #1
    The conditions on equi-angular tight frames can be found https://www.math.ucdavis.edu/~strohmer/papers/2007/equi.pdf on the first page. I created optimal grassmannian frames which are equiangular tight frames. But I need to clarify on condition (4) from the link. For example for a ETF(3,7) the frames were created by using the (1/sqrt(3))*{exp(2*pi*i*k*d_j/7)} for j =1 to 3 and k=1,2,3,....,7 d_j ={0,1,5} , there will be two frames equal to another by symmetry. Is this counted as the condition k=/=l ?
  2. jcsd
  3. Sep 28, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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