求：一个关于FIR带通滤波器的C语言设计程序 代码

short h[], short y[])

{

int i, j, sum for (j = 0j <100j++) {

sum = 0

for (i = 0i <32i++)

sum += x[i+j] * h[i]

y[j] = sum >>15

}

}

2

void fir(short x[], short h[], short y[])

{

int i, j, sum0, sum1

short x0,x1,h0,h1 for (j = 0j <100j+=2) {

sum0 = 0

sum1 = 0

x0 = x[j]

for (i = 0i <32i+=2){

x1 = x[j+i+1]

h0 = h[i]

sum0 += x0 * h0

sum1 += x1 * h0

x0 = x[j+i+2]

h1 = h[i+1]

sum0 += x1 * h1

sum1 += x0 * h1

}

y[j] = sum0 >>15

y[j+1] = sum1 >>15

}

}

3

void fir(short x[], short h[], short y[])

{

int i, j, sum0, sum1

short x0,x1,x2,x3,x4,x5,x6,x7,h0,h1,h2,h3,h4,h5,h6,h7 for (j = 0j <100j+=2) {

sum0 = 0

sum1 = 0

x0 = x[j]

for (i = 0i <32i+=8){

x1 = x[j+i+1]

h0 = h[i]

sum0 += x0 * h0

sum1 += x1 * h0

x2 = x[j+i+2]

h1 = h[i+1]

sum0 += x1 * h1

sum1 += x2 * h1

x3 = x[j+i+3]

h2 = h[i+2]

sum0 += x2 * h2

sum1 += x3 * h2

x4 = x[j+i+4]

h3 = h[i+3]

sum0 += x3 * h3

sum1 += x4 * h3

x5 = x[j+i+5]

h4 = h[i+4]

sum0 += x4 * h4

sum1 += x5 * h4

x6 = x[j+i+6]

h5 = h[i+5]

sum0 += x5 * h5

sum1 += x6 * h5

x7 = x[j+i+7]

h6 = h[i+6]

sum0 += x6 * h6

sum1 += x7 * h6

x0 = x[j+i+8]

h7 = h[i+7]

sum0 += x7 * h7

sum1 += x0 * h7

}

y[j] = sum0 >>15

y[j+1] = sum1 >>15

}

}

float middle_filter(float middle_value [] , intcount)

{

    float sample_value, data

    int i, j

    for (i=1 i for(j=count-1 j>=i,--j){

        if(middle_value[j-1]=middle_value[j]{

            data=middle_value[j-1]

            middle_value[j-1]=middle_value[j]

            middle_value[j]=data

        }

    }

    sample_value=middle_value(count-1)/2]

    return(sample_value)

}

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