mydis.h

用simlink开发的space-time coding仿真模型,仿真的精度与效率有不小的提高

double mydis (double r_re,double r_im,double h1_re,double h1_im,double h2_re,double h2_im,int x1,int x2)
{
	double tempd,temp_re,temp_im,x1_re,x1_im,x2_re,x2_im;
	
	if (x1==0){
		x1_re=1;
		x1_im=0;
	}
	else if (x1==1){
		x1_re=0;
		x1_im=1;
	}
	else if (x1==2){
		x1_re=-1;
		x1_im=0;
	}
	else {
		x1_re=0;
		x1_im=-1;
	}
	
	if (x2==0){
		x2_re=1;
		x2_im=0;
	}
	else if (x2==1){
		x2_re=0;
		x2_im=1;
	}
	else if (x2==2){
		x2_re=-1;
		x2_im=0;
	}
	else {
		x2_re=0;
		x2_im=-1;
	}

	temp_re = r_re - h1_re*x1_re + h1_im*x1_im - h2_re*x2_re + h2_im*x2_im;
	temp_im = r_im + h1_im*x1_re + h1_re*x1_im + h2_im*x2_re + h2_re*x2_im;
    tempd=temp_re*temp_re + temp_im*temp_im;
	return  (tempd);
}