On the ambiguity of COMET-EXIP algorithm for estimating a scattered source

@article{Zoubir2005OnTA,
  title={On the ambiguity of COMET-EXIP algorithm for estimating a scattered source},
  author={Ahmed Zoubir and Yide Wang and Pascal Charg{\'e}},
  journal={Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005.},
  year={2005},
  volume={4},
  pages={iv/941-iv/944 Vol. 4}
}
The extended invariance principle (EXIP) has been applied to the structured covariance estimation of a zero mean Gaussian vector; the resulting method was named COMET (covariance matching estimation techniques). This technique has been recently used for estimating separately and efficiently the direction of arrival (DOA) and angular spread of a scattered source. Unfortunately this new technique presents an ambiguity that limits its utilization in practice. We show in this paper the existence… CONTINUE READING

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