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This paper introduced the structure and design method of FIR filter and circular addressing. it gave the program validated in TMS320DM642 and the figure contrasted.
介绍了FIR滤波器的基本结构、设计方法和循环寻址的特点，给出了利用TMS320DM642设计FIR数字滤波器的主要编程语句及其实验波形。
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