Research on SNR Improvement in Ultrasonic Imaging by Coded Excitation with Carrier Modulation

LIU Bo; GUO Jian-zhong

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Research on SNR Improvement in Ultrasonic Imaging by Coded Excitation with Carrier Modulation

更新时间：2025-07-16

- Research on SNR Improvement in Ultrasonic Imaging by Coded Excitation with Carrier Modulation
- Acta Electronica Sinica Vol. 39, Issue 11, Pages: 2701-2707(2011)
- 作者机构：
  
  陕西师范大学物理学与信息技术学院,陕西省应用声学研究所,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB559
- Published：2011
- 稿件说明：
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LIU Bo, GUO Jian-zhong. Research on SNR Improvement in Ultrasonic Imaging by Coded Excitation with Carrier Modulation[J]. Acta Electronica Sinica, 2011, 39(11): 2701-2707.
DOI：

LIU Bo, GUO Jian-zhong. Research on SNR Improvement in Ultrasonic Imaging by Coded Excitation with Carrier Modulation[J]. Acta Electronica Sinica, 2011, 39(11): 2701-2707. DOI：

摘要

针对压电陶瓷换能器的频带特性

采用正弦波载频调制二相编码信号的激励方案

研究换能器对单位码元载有不同周期载频的二相巴克码激励信号的影响

分析回波的脉冲压缩处理结果

优化调制参数

探讨激励信号与换能器的最佳匹配方式.利用本文提出的最佳调制参数的编码激励信号

在多目标环境下对四根靶线的复杂回波进行脉冲压缩实验研究

结果表明超声换能器对这种激励信号的响应及其回波的脉冲压缩效果理想

可以极大地提高超声检测的信噪比.

Abstract

Considering the frequency spectrum of the piezoelectric ceramic transducer

this study uses a bi-phase coding signal modulated by a sine carrier as the excitation mode.Through using Barker code signal with each chip modulated by different periods of carrier

the transducer effect on the exciting signal and compression result is analyzed

modulation parameter is optimized

and the best matching mode between the exciting signal and the transducer is discussed.The echo of four target wires is processed by pulse compression with the optimum signal

the result shows that this excitation mode has a good performance on the transducer response

and it can enhance the SNR of the ultrasonic signal significantly.

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