Abstract:
When the correlation matrix is known, the resolution power of subspace algorithms is infinite. In the presence of modelling errors, even if the correlation matrix is know...Show MoreMetadata
Abstract:
When the correlation matrix is known, the resolution power of subspace algorithms is infinite. In the presence of modelling errors, even if the correlation matrix is known, sources can no longer be resolved with certainty. Focusing on the MUSIC algorithm, the purpose of this work is to provide closed form expression of bias and variance versus the model mismatch (these errors can be different for each source). Unlike previous work, these performance measures are derived conditioned on the success of a certain source resolution test. Among the resolution definitions proposed, we investigate which one is more suitable for our purposes. Numerical results support the theoretical investigations. Our findings are of a great interest for the determination of the necessary antenna calibration accuracy to achieve specifications on the estimator performance.
Published in: 2008 16th European Signal Processing Conference
Date of Conference: 25-29 August 2008
Date Added to IEEE Xplore: 06 April 2015
Print ISSN: 2219-5491
Conference Location: Lausanne, Switzerland