摘要目的 设计满足全数字眼科超声系统高速高性能信号处理需要的数字滤波器.方法 用加入流水线级的并行乘累加方式和基于分割表的并行分布式算法设计基于现场可编程门阵列(FPGA)的32阶高速FIR低通滤波器,并在Quartus Ⅱ开发平台及Modelsim仿真平台上进行仿真验证.结果 2种方式设计的FIR滤波器经仿真验证,均满足设计要求.结论 通过对设计结果的分析比较,基于分割表的并行分布式算法设计的滤波器能在灵活配置资源占用的情况下,实现高速数据处理,为全数字眼科超声系统中滤波器的实现方法提供了选择的依据.

abstractsObjective To design a digital filter to meet the needs for high-speed and high-performance sig-nal processing in digital ophthalmology ultrasongraphy. Method Thirty-two order high-speed and low-pass finite impulse response (FIR) filters were designed in field programmable gate array (FPGA) by use of parallel multiply, accumulate with pipelines and parallel distributed algorithm based on the partition table, respectively. Simulations were accomplished in Quartus II developing platform and Modelsim simulation platform. Results According to the simulation results, both FIR filters meet the design requirements. Conclusion The results of analysis and compar- ison show that the filter designed with parallel distributed algorithm based on the partition table can process signals with higher speed and flexible allocation of resources, which provides us with the basis of choice to design the filters in digital ophthalmology ultrasongraphy.