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Minimum Variance Signal Selection for Aorta Radius Estimation Using Radar

Abstract

This paper studies the optimum signal choice for the estimation of the aortic blood pressure via aorta radius, using a monostatic radar configuration. The method involves developing the Cramér-Rao lower bound (CRLB) for a simplified model. The CRLB for model parameters are compared with simulation results using a grid-based approach for estimation. The CRLBs are within the 99% confidence intervals for all chosen parameter values. The CRLBs show an optimal region within an ellipsoid centered at 1 GHz center frequency and 1.25 GHz bandwidth with axes of 0.5 GHz and 1 GHz, respectively. Calculations show that emitted signal energy to received noise spectral density should exceed for a precision of approximately 0.1 mm for a large range of model parameters. This implies a minimum average power of 0.4 . These values are based on optimistic assumptions. Reflections, improved propagation model, true receiver noise, and parameter ranges should be considered in a practical implementation.

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Correspondence to LarsErik Solberg.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Solberg, L., Hamran, SE., Berger, T. et al. Minimum Variance Signal Selection for Aorta Radius Estimation Using Radar. EURASIP J. Adv. Signal Process. 2010, 682037 (2010). https://doi.org/10.1155/2010/682037

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Keywords

  • Radar
  • Optimal Region
  • Publisher Note
  • Aortic Blood
  • Optimum Signal