Overview

This block computes the dot product (or inner product) between two vectors, the input and taps vectors. Given a set of num_points taps, the result is the sum of products between the two vectors. The result is a single value stored in the result address and will be complex.

Dispatcher Prototype

void volk_32fc_32f_dot_prod_32fc(lv_32fc_t* result, const lv_32fc_t* input, const float * taps, unsigned int num_points)

Inputs

• input: vector of complex samples
• taps: floating point taps
• num_points: number of samples in both input and taps

Outputs

• result: pointer to a complex value to hold the dot product result.

Example

int N = 10000;
lv_32fc_t y;
lv_32fc_t *x = (lv_32fc_t*)volk_malloc(N*sizeof(lv_32fc_t), volk_get_alignment());
float *t = (float*)volk_malloc(N*sizeof(float), volk_get_alignment());
 
<populate x and t with some values>
 
volk_32fc_dot_prod_32fc(&y, x, t, N);
 
volk_free(x);
volk_free(t);