Minimum Variance Signal Selection for Aorta Radius Estimation Using Radar

Author
Solberg, Lars Erik
Hamran, Svein-Erik
Berger, Tor
Balasingham, Ilangko
Date Issued
2010
Keywords
Radar
Kreft
Permalink
http://hdl.handle.net/20.500.12242/761
https://publications.ffi.no/123456789/761
DOI
10.1155/2010/682037
Collection
Articles
Description
Solberg, Lars Erik; Hamran, Svein-Erik; Berger, Tor; Balasingham, Ilangko. Minimum Variance Signal Selection for Aorta Radius Estimation Using Radar. EURASIP Journal on Advances in Signal Processing 2010 s. -
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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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