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Updated: Sep 18, 2025

Ultrasound-based Pulse Wave Velocity Evaluation in Mice
Published on: February 14, 2017
Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection
Chongbin Xi1,2, Jian Zhou1,2, Xiaoming Nie1,2
1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
None:
When the amplitude of the laser Doppler signal is less than that of the noise amplitude, the speed information cannot be identified. In this paper, the recognition of weak Doppler signals is accomplished by superimposing multiple-frame Doppler signals in the frequency domain and eliminating the base noise. Meanwhile, the relative prominence is defined to assess the quality of Doppler signals. The theoretical analysis and experimental results demonstrate that the relative prominence can be enhanced by more than two orders of magnitude through the stacking of 10,000 frames of Doppler signals. Moreover, this paper establishes a foundation for determining the threshold of relative prominence in practical measurements. When the relative prominence at a specific point on the spectrum is 3, there is at least a 99.08% probability that this point corresponds to the target signal.
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