基于FPGA的编码超声发射系统的设计  

Coded Ultrasound Transmitting System based on Field Programmable Gate Array

作　　者：周奇[1] 王晓春[1] 计建军[1] 王延群[1] 

机构地区：[1]中国医学科学院生物医学工程研究所,天津300192

出　　处：《生物医学工程研究》2008年第4期243-247,共5页Journal Of Biomedical Engineering Research

基　　金：中央级公益性科研院所业务专项项目(2007);天津支撑计划项目(207CKFSF01400)。

摘　　要：介绍一种以现场可编码门阵列(FPGA)为基础的低电压编码超声发射系统。该系统采用XC3S400FPGA产生编码超声发射所对应的数字编码,该数字编码经过模数转换产生编码发射波形,再将发射波形经过放大后作用于超声换能器,通过回波信号放大电路提取回波信号,对回波信号压缩处理分析结果表明:该编码超声发射系统能满足超声成像指标要求,降低超声单脉冲发射峰值声功率,提高信噪比。To design a low voltage coded ultrasound transmitting system based on field programmable gate array(FPGA).The digital codes corresponding to coded ultrasound transmitting was generated by XC3S400 FPGA.The digital code was transformed coded transmitting wave by analog-to-digital converting.Coded transmitting wave was amplified and then acted on the ultrasound probe.The coded transmitting echo was gotten by an amplifier circuit.As a result of echo′s pulse compression,this coded ultrasound transmitting system ...

关 键 词：编码发射 脉冲压缩 信噪比 回波 GOLAY码 现场可编码门阵列 

分 类 号：TB552[理学—物理]