Vector Optimized Library of Kernels  2.0
Architecture-tuned implementations of math kernels

Overview

Takes the conjugate of a complex vector.

Dispatcher Prototype

void volk_32fc_conjugate_32fc(lv_32fc_t* cVector, const lv_32fc_t* aVector, unsigned int num_points)

Inputs

  • aVector: The input vector of complex floats.
  • num_points: The number of data points.

Outputs

  • bVector: The output vector of complex floats.

Example Generate points around the top half of the unit circle and conjugate them to give bottom half of the unit circle.

int N = 10;
unsigned int alignment = volk_get_alignment();
lv_32fc_t* in = (lv_32fc_t*)volk_malloc(sizeof(lv_32fc_t)*N, alignment);
lv_32fc_t* out = (lv_32fc_t*)volk_malloc(sizeof(lv_32fc_t)*N, alignment);
for(unsigned int ii = 0; ii < N; ++ii){
float real = 2.f * ((float)ii / (float)N) - 1.f;
float imag = std::sqrt(1.f - real * real);
in[ii] = lv_cmake(real, imag);
}
volk_32fc_conjugate_32fc(out, in, N);
for(unsigned int ii = 0; ii < N; ++ii){
printf("out(%i) = %.1f + %.1fi\n", ii, lv_creal(out[ii]), lv_cimag(out[ii]));
}
volk_free(out);