2 June 2005 Power spectrum estimation with IDMR beamforming
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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.
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Ernesto Santos, Ernesto Santos, Michael Zoltowski, Michael Zoltowski, } "Power spectrum estimation with IDMR beamforming", Proc. SPIE 5819, Digital Wireless Communications VII and Space Communication Technologies, (2 June 2005); doi: 10.1117/12.606372; https://doi.org/10.1117/12.606372

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