一种获取超声正交信号的有效方法  

AN EFFECTIVE METHOD OF GETTING ULTROSONIC QUADRATURE SIGNAL

作　　者：冯乃章[1] 沈毅[1] 刘志言[1] 王皓[1] 

机构地区：[1]哈尔滨工业大学,327哈尔滨150001

出　　处：《中国生物医学工程学报》2001年第6期510-515,共6页Chinese Journal of Biomedical Engineering

摘　　要：针对全数字彩色B超仪中正交信号的获取问题 ,在分析现有常用方法特点的基础上 ,提出了一种新的方案。该方案实现电路简单、成本低 ,并且能快速地获取优质的正交信号 ,具有非常好的实用价值。希尔伯特变换是该方案实现的一个重要工具。For the problem of getting quadrature signal of all digital colorful B-scanner, a new plan was proposed on the base of analyzing the methods on hand and most of those in use. The circuit of this plan was simple and cheap. Moreover, it could fast get high quality quadrature signal and have good practical value. Hilbert transform was an important tool that mades the plan feasible.

关 键 词：电子聚焦 回波信号 正交信号 通道 希尔伯特变换 

分 类 号：R318.04[医药卫生—生物医学工程] R312[医药卫生—基础医学]