Dimension discrepancy for 'a' vs 'tau'/'theta_r' in compute_paths()

[lllck]

Hello! Could you please clarify why the dimension of 'a' in the paths returned by scene.compute_paths() is [batch_size, num_rx, num_rx_ant, num_tx, num_tx_ant, max_num_paths, num_time_steps], while other parameters like 'tau' and 'theta_r' have dimensions of [batch_size, num_rx, num_tx, max_num_paths]? Why do these other parameters lack the antenna number dimensions?

[SebastianCa]

Hi @lllck,
this happens if you run the ray tracer with synthetic_array=True which means ray tracing is done from the center of the antenna array. Thus, only one path length exists. If you set synthetic_array=False you will get individual paths for each antenna element and, thus, the additional dimensions for tau.

Closing this issue as the described behaviour is expected.