main_iir.c

本人收集的DSP例子程序－数字信号处理IIR程序

#include "stdlib.h"
#include "stdio.h"
#include "typedef.h"
#include "Iir.h"

#define Length		80
#define IirOrder	10

void main()
{
	Word16 i ;
	Word16 Input[Length] ;
	Word16 Output[Length] ;
	Word16 Iir_Memory[IirOrder] ;
	Word16 Iir_Coef[IirOrder] = { 3405, 571, -1029, 267, 38, 130, -79, -539, 1032, 45 } ;


	//	产生随机输入数据, 以及随机的IIR滤波器状态

	Input[0] = 3892 ;
	for( i = 1 ; i < Length ; i ++ )
	{
		Input[i] = (Word16)((51*(Input[i-1])+259)&0xffff) ;
	}

	Iir_Memory[0] = 9257 ;
	for( i = 1 ; i < IirOrder ; i ++ )
	{
		Iir_Memory[i] = (Word16)((17*(Iir_Memory[i-1])+328)&0xffff) ;
	}

	Iir( Input, Output, Iir_Coef, Iir_Memory, IirOrder, Length ) ;

	return ;
}