A Triply Selective MIMO Channel Simulator Using GPUs

Listing 3

Filtering code.

VEX_FUNCTION_D(cl_double2, convolution,

(size_t, i)(cl_double2, x)

(double, y)(int, tF)(int, fS)

(int, nS)(int, nP),(csum)

(cmulscalar),

double2 sum = 0.0,0.0;

int tmp1 = i+(i/fS) (nS-fS);

int tmp2 = tF (i/(fSnP)+1) - 1;

for(size_t j = 0; j < tF; j++)

sum = csum(sum,

cmulscalar(x[tmp1+j],y[tmp2-j]));

return sum;

);