Complex equiangular tight frames
Complex equiangular tight frames
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复杂等角紧框架
DOI:
10.1117/12.618821
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
J. Tropp
中科院分区:
文献类型:
--
作者:
J. Tropp
A complex equiangular tight frame (ETF) is a tight frame consisting of N unit vectors in Cd whose absolute inner products are identical. One may view complex ETFs as a natural geometric generalization of an orthonormal basis. Numerical evidence suggests that these objects do not arise for most pairs (d, N). The goal of this paper is to develop conditions on (d, N) under which complex ETFs can exist. In particular, this work concentrates on the class of harmonic ETFs, in which the components of the frame vectors are roots of unity. In this case, it is possible to leverage field theory to obtain stringent restrictions on the possible values for (d, N).