Analog Devices VISUALDSP++ 3.5 Manual page 481

gen_blackman
generate blackman window
Synopsis
#include <window.h>
void gen_blackman_fr16(w,a,N)
fract16 w[];
int a;
int N;
Description
This function generates a vector containing the Blackman window. The
length of the window required is specified by the parameter
stride parameter
vector . The length of the output vector should therefore be
w
Algorithm
= −
w n [ ] 0 42 0 5 . . cos
where n = {0, 1, 2, ..., N-1}
Domain
a > 0; N > 0
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
for ADSP-219x DSPs
/* Window vector
/* Address stride in samples for window vector */
/* Length of window vector
is used to space the window values within the output
a
π π
2 n 4
  
 +
0 08 . cos
 
  
−
N 1 N
DSP Run-Time Library
n



−
1
*/
*/
, and the
N
.
N*a
4-65