Two-dimensional spectrum estimation for flow with multiple velocities using Maximum Entropy

Aiping Yao, Yi Zheng, James F. Greenleaf

Research output: Contribution to journalConference article

Abstract

We have developed a high-resolution method to estimate multiple velocities of flows within one sample volume of pulse echo ultrasound for small flows. The method uses Maximum Entropy Method (MEM) to estimate the covariance matrix of a two-dimensional (2-D) signal when data length is limited. The estimated covariance is used to calculate high-resolution 2-D power spectrum of flows. The simulation and experiment results show that our method provides high-resolution estimations for multiple velocities when data length is limited and small flows are closely located.

Original languageEnglish (US)
Pages (from-to)1594-1597
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume2
StatePublished - Dec 1 2003
Event2003 IEEE Ultrasonics Symposium - Proceedings - Honolulu, HI, United States
Duration: Oct 5 2003Oct 8 2003

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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