Blind channel identification based on second-order statistics: a frequency-domain approach

Authors:
Lang Tong;Guanghan Xu;B. Hassibi;T. Kailath
Affiliations:
Dept. of Electr. & Syst. Eng., Connecticut Univ., Storrs, CT;-;-;-
Venue:
IEEE Transactions on Information Theory
Year:
1995

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Abstract

In this communication, necessary and sufficient conditions are presented for the unique blind identification of possibly nonminimum phase channels driven by cyclostationary processes. Using a frequency domain formulation, it is first shown that a channel can be identified by the second-order statistics of the observation if and only if the channel transfer function does not have special uniformly spaced zeros. This condition leads to several necessary and sufficient conditions on the observation spectra and the channel impulse response. Based on the frequency-domain formulation, a new identification algorithm is proposed