taylorwin(n,nbar,sll)加窗函数 c/c++代码

以下是一个示例的C代码：

#include <math.h>

void taylorwin(double *win, int n, double nbar, double sll)
{
    double const pi = acos(-1.0);
    double const eps = 2.2204e-16;

    double const m = n - 1;
    double const om = pi * sll;
    double const alpha = acos(1.0 - (nbar - 0.5) / m * om / pi);
    double const beta = nbar * pi / m;
    double const B = 2.0 / (m * sin(om));
    double const A = log(eps);

    for (int i = 0; i < n; ++i)
    {
        double const theta = pi * (i - 0.5) / m;
        double const omegap = beta - alpha * cos(theta);
        double const omegas = om - omegap;
        double const w = B * (A + log(sin(omegap / 2.0) + eps) + log(sin(omegas / 2.0) + eps));
        win[i] = w;
    }
}

其中，`win`是一个长度为`n`的数组，用于存储窗函数；`nbar`是带宽宽度参数，通常取值为3~6；`sll`是旁瓣抑制参数，通常取值为-30dB~60dB。