serving_indices

sionna.sys.serving_indices(coupling_loss: torch.Tensor) → torch.Tensor

Returns the serving-cell indices for minimum coupling loss.

The serving BS is selected as

\[b^\star(u) = \arg\min_b \mathrm{CL}_{b,u}.\]

This minimum-coupling-loss association is used by the 3GPP TR 38.901 calibration metrics in Section 7.8 of [TR38901V160100] before computing geometry SIR and geometry SINR.

Parameters:

coupling_loss (torch.Tensor) – Coupling loss [dB] with shape [..., num_bs].

Outputs:

serving – Serving BS indices with shape [...].