基于FPGA圆阵超声自适应波束形成的设计

Design of Ultrasonic Array Adaptive Beam-Formed Base on FPGA

设计了一种适于FPGA实现的圆阵数字自适应波束形成系统结构,系统采用FIR架构及延迟最小均方算法(DLMS),其中复数乘加模块采用循环移位乘加算法,自适应模块采用并行乘法器及时更新权系数。仿真结果表明基于FP-GA芯片实现数字自适应波束形成(DABF)具有实时性好,结构简单,易于实现等优点。

This paper describes the design of a digital Adaptive Beam Forming（ABF） system architecture base on FPGA. The ABF system uses FIR structure and Delayed Least Mean Square （DLMS） in which multiply-add module：is de;signed by the method of cycle displacement pipeling MAC. The method meets the requirements of computational speed of the plural operation to save a lot of resources,adaptive parallel multiplier module is used to update the weights. Simulation results show the Digital Adaptive Beam Forming （DABF） based on FPGA chip has the advantages of time-effieieney, simple and easy to realize etc.