采用8031作主控器的时域FIR数字滤波器

长期以来，ＦＩＲ数字滤波器大多是在频域上实现。因为，在时域上实现ＦＩＲ数字滤波所遇到的首要问题，是输入信号序列与冲激响应序列的卷积运算速度难以提高。然而，随着超大规模集成电路的飞速发展，硬件集成度与运算速度获得极大的改观，在时域上实现ＦＩＲ数字滤波已成为可能。ＩＭＳＡ１００是高速、高精度３２级数字信号处理器，是完成卷积运算的理想器件。本文论证了用ＩＭＳＡ１００实现时域ＦＩＲ数字滤波器的可行性和硬件设计中的一些问题，并给出了应用举例。在设计中选用８０３１单片机做主控器，大大提高了性能价格比，使这一设计具有很高的实用价值。

Time FIR Digital Filter with Host Controller Using 8031

For a long time,most of the FIR digital filters have been achieved in the frequency domain, because it is difficult to increase the convolution operation speed of the input and impulse reponse sequence in achieving a time FIR digital filter. However,with the rapid development of VLSI, the hardware operation speed increases greatly. It has been possible to achieve the time FIR digital filter. IMSA100 is a high speed and precision digital signal processor,and is an ideal device in increasing the convolution speed. This paper proves the feasibility of using IMSA100 to achieve a time FIR digital filter and some issue in hardware design. In this design,the 8031 is the host controller. The rate between performance and pricehas risen greatly. It is a design of practical value.