espnet2.enh.layers.beamformer_th.get_lcmv_vector_with_rtf

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espnet2.enh.layers.beamformer_th.get_lcmv_vector_with_rtf(psd_n: Tensor, rtf_mat: Tensor, reference_vector: int | Tensor | None = None, diagonal_loading: bool = True, diag_eps: float = 1e-07, eps: float = 1e-08) → Tensor

Return the LCMV (Linearly Constrained Minimum Variance) vector : calculated with RTF: <br/> h = (Npsd^-1 @ rtf_mat) @ (rtf_mat^H @ Npsd^-1 @ rtf_mat)^-1 @ p

Reference: : H. L. Van Trees, “Optimum array processing: Part IV of detection, estimation, and modulation theory,” John Wiley & Sons, 2004. (Chapter 6.7)

• Parameters:
  • psd_n (torch.complex64) – observation/noise covariance matrix (…, F, C, C)
  • rtf_mat (torch.complex64) – RTF matrix (…, F, C, num_spk)
  • reference_vector (torch.Tensor or int) – (…, num_spk) or scalar
  • diagonal_loading (bool) – Whether to add a tiny term to the diagonal of psd_n
  • diag_eps (float)
  • eps (float)
• Returns: (…, F, C)
• Return type: beamform_vector (torch.complex64)