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A cumulant matrix subspace algorithm for blind single FIR channel identification

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2 Author(s)
Zhi Ding ; Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA ; Jing Liang

Blind identification of discrete-time single-user FIR channels with nonminimum phase is studied here. Exploiting higher order cumulants of output signals of unknown channels, a new closed-form solution to the FIR channel impulse response is derived. The algorithm is simple and fast. It relies only on nullspace decomposition of some cumulant matrices. This method neither involves the difficult task of iterative global minimization of nonunimodal cost functions, nor does it require overparametrization, which poses consistency difficulties. It can be used either as the final channel estimate or as a good initial point in nonlinear cumulant matching techniques. The application of this identification method is broad and not limited to the use of any fixed-order cumulants. Its application in identifying data communication systems shows great potential and promise

Published in:

Signal Processing, IEEE Transactions on  (Volume:49 ,  Issue: 2 )

Date of Publication:

Feb 2001

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