mindspore.ops.blackman_window

mindspore.ops.blackman_window(window_length, periodic=True, *, dtype=None)[source]

Blackman window function.

Usually used to extract finite signal segment for FFT.

w [n] = 0.42 - 0.5 c o s (\frac{2 π n}{N - 1}) + 0.08 c o s (\frac{4 π n}{N - 1})

where $N$ is the full window size, and n is natural number less than $N$ :[0, 1, …, N-1].

Parameters

window_length (Tensor) – The size of window.
periodic (bool, optional) – If True , return a periodic window. If False, return a symmetric window. Default True .

Keyword Arguments

dtype (mindspore.dtype, optional) – The data type specified. Default None .

Returns

A 1-D tensor.

Supported Platforms:: Ascend GPU CPU

Examples

>>> import mindspore
>>> window_length = mindspore.tensor(10)
>>> output = mindspore.ops.blackman_window(window_length)
>>> print(output)
[-2.9802322e-08  4.0212840e-02  2.0077014e-01  5.0978714e-01
  8.4922993e-01  1.0000000e+00  8.4922981e-01  5.0978690e-01
  2.0077008e-01  4.0212870e-02]