CAJ | 학술논문

在超声诊断系统中,一个重要的环节就是实时处理庞大的超声信号,尤其是用数字硬件电路实时进行信号处理.信号处理的关键部分就是滤波器的设计,数字滤波器的设计会直接影响超声诊断设备的性能.简要介绍数字滤波器的分类,着重介绍近年来基于现场可编程门阵列(FPGA)的多种数字滤波器的硬件实现方法,尤其是经典数字滤波器中基于分布式算法实现有限脉冲响应(FIR)滤波器;分析了每种数字滤波器的优点及存在的问题;展望了超声诊断设备中现代数字滤波器的发展趋势.
재초성진단계통중,일개중요적배절취시실시처리방대적초성신호,우기시용수자경건전로실시진행신호처리.신호처리적관건부분취시려파기적설계,수자려파기적설계회직접영향초성진단설비적성능.간요개소수자려파기적분류,착중개소근년래기우현장가편정문진렬(FPGA)적다충수자려파기적경건실현방법,우기시경전수자려파기중기우분포식산법실현유한맥충향응(FIR)려파기;분석료매충수자려파기적우점급존재적문제;전망료초성진단설비중현대수자려파기적발전추세.
A large real-time processing of ultrasonic signals is a very important part in the ultrasound diagnosis system,especially with digital hardware processing.A key part of the signal processing is the filter design which will affect the performance of ultrasound diagnostic equipment.In this paper,the classification of digital filters is introduced briefly,and a number of hardware implementation methods of digital filter in recent years,especially the realization of FIR filters which belongs to the classical filter based on Distributed Algorithms are discussed.Then a number of advantages and problems of digital filter in recent years are analyzed.On this basis,the paper forecasts its developing trends in the future.