%0 Conference Paper
%A Le, Trung Thanh
%A Karim, Abed Meraim
%A Nguyen, Linh Trung
%B 29th European Signal Processing Conference
%C Dublin, Ireland
%D 2021
%F SisLab:4454
%T Performance lower bounds of blind system identification techniques in the presence of channel order estimation error
%U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4454/
%X In this paper, we derive two performance lower bounds  for blind system identification in the presence of channel order  estimation error. The first bound deals with models where  both the channel and unknown symbols are deterministic, and  obtained via the constrained misspecified Cramer-Rao bound  (MCRB). When transmitted symbols are unknown random variables i.i.d. drawn from a stochastic Gaussian process, variance  of any unbiased estimators is always higher than the second  MCRB bound. Both proposed MCRB bounds reduce to the  classical Cramer-Rao bounds when the channel order is known  or accurately estimated. Besides, the stochastic MCRB is lower than the deterministic bound, especially at high SNRs