tf.signal.rfft

Real-valued fast Fourier transform.

Used in the notebooks

Used in the tutorials

Computes the 1-dimensional discrete Fourier transform of a real-valued signal over the inner-most dimension of input.

Since the DFT of a real signal is Hermitian-symmetric, RFFT only returns the fft_length / 2 + 1 unique components of the FFT: the zero-frequency term, followed by the fft_length / 2 positive-frequency terms.

Along the axis RFFT is computed on, if fft_length is smaller than the corresponding dimension of input, the dimension is cropped. If it is larger, the dimension is padded with zeros.

inputA Tensor. Must be one of the following types: float32, float64. A float32 tensor.
fft_lengthA Tensor of type int32. An int32 tensor of shape [1]. The FFT length.
nameA name for the operation (optional).

A Tensor of type Tcomplex.