Doppler Velocity Estimation of Overlapping Linear-Period-Modulated Ultrasonic Waves Based on an Expectation-Maximization Algorithm | Zendy

Natee Thong-un | Zendy; Minoru Kurosawa | Zendy

Open Access

Doppler Velocity Estimation of Overlapping Linear-Period-Modulated Ultrasonic Waves Based on an Expectation-Maximization Algorithm

Author(s) -

Natee Thong-un,

Minoru Kurosawa

Publication year - 2014

Publication title -

advances in acoustics and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.237

H-Index - 14

eISSN - 1687-627X

pISSN - 1687-6261

DOI - 10.1155/2014/921876

Subject(s) - ultrasonic sensor , signal (programming language) , doppler effect , algorithm , pulse compression , maximization , acoustics , pulse (music) , computer science , expectation–maximization algorithm , mathematics , physics , mathematical optimization , maximum likelihood , telecommunications , radar , statistics , astronomy , detector , programming language

The occurrence of an overlapping signal is a significant problem in performing multiple objects localization. Doppler velocity is sensitive to the echo shape and is also able to be connected to the physical properties of moving objects, especially for a pulse compression ultrasonic signal. The expectation-maximization (EM) algorithm has the ability to achieve signal separation. Thus, applying the EM algorithm to the overlapping pulse compression signals is of interest. This paper describes a proposed method, based on the EM algorithm, of Doppler velocity estimation for overlapping linear-period-modulated (LPM) ultrasonic signals. Simulations are used to validate the proposed method

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