cupyx.scipy.signal.symiirorder1#

cupyx.scipy.signal.symiirorder1(input, c0, z1, precision=-1.0)[source]#

Implement a smoothing IIR filter with mirror-symmetric boundary conditions using a cascade of first-order sections. The second section uses a reversed sequence. This implements a system with the following transfer function and mirror-symmetric boundary conditions:

                c0
H(z) = ---------------------
        (1-z1/z) (1 - z1 z)

The resulting signal will have mirror symmetric boundary conditions as well.

Parameters:

  • input (ndarray) – The input signal.

  • c0 (scalar) – Parameters in the transfer function.

  • z1 (scalar) – Parameters in the transfer function.

  • precision – Specifies the precision for calculating initial conditions of the recursive filter based on mirror-symmetric input.

Returns:

output – The filtered signal.

Return type:

ndarray