实时滤波算法。开发环境ccs3.1，芯片德州仪器c5509，已通过检测，很好的-Real-time filtering algorithm. Development environment ccs3.1, Texas Instruments chip c5509, has passed testing, good

1. To design IIR filters in MATLAB to achieve various types of frequency selectivity, e.g.,lowpass, highpass, bandpass, etc 2. To implement the designed IIR filters in different architectural forms (e.g., direct form vssecond-order cascade form) u