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Proceedings Paper

Power spectrum estimation with IDMR beamforming
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Paper Abstract

In the adaptive beamforming problem it is usual that the covariance matrix is not know and an estimate from training samples is used. When the size of the training samples is limited the performance of the full rank Minimum Variance Distortionless Response (MVDR) beamformer is deteriorated; and a low rank solution of the MVDR problem can yield a better performance. A new adaptive approach, Indirect Dominant Mode Rejection (IDMR), was introduced in previous work to solve the MVDR optimization problem. In the previous work the IDMR beamformer was used to extract the desired signal, while in this work we use the IDMR beamformer to estimate the power spectrum. We also introduce several modifications, which bring more robustness to the basic IDMR. These include root-music, forward/backward averaging of the sample covariance matrix and power window.

Paper Details

Date Published: 2 June 2005
PDF: 9 pages
Proc. SPIE 5819, Digital Wireless Communications VII and Space Communication Technologies, (2 June 2005);
Show Author Affiliations
Ernesto Santos, Purdue Univ. (United States)
Michael Zoltowski, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 5819:
Digital Wireless Communications VII and Space Communication Technologies
Rabindra Singh; Raghuveer M. Rao; Sohail A. Dianat; Michael D. Zoltowski, Editor(s)

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