Investigate the modelling of 5G AAS (both in-band and unwanted domain) based on laboratory and other measurements as appropriate of commercially available equipment:

1) Assess existing models against measurements

2) Consider modifications to existing model if differences are seen

3) If modification is not feasible then develop new model

ECC Report first, then if appropriate a Recommendation

This task should investigate the modelling aspects of 5G AAS:

1) in the in-band domain

2) in the unwanted domain

The model should cover the relevant aspects of real antenna system (e.g. grating lobes) based on the results of laboratory measurements of 5G AAS.

The WI to be done to provide technical support to SE21 in regards to WI SE21_25.

See also relevant work ITU-R WP5D.