A method and an antenna array system are provided for estimating parameters of radio signals impinging on antenna arrays, for estimating angular parameters, for estimating angular distribution types, and for selecting types of antenna array processing. Models of angular distribution types are used to populate look-up tables. Correlation magnitudes and correlation phases of signals impinging on antenna elements of antenna arrays are used as pointers to obtain values of parameters from the look up tables. The obtained values may be compared to some value ranges in order to select appropriate antenna array processing types. Where the angular distribution type is unknown, several values representing angular parameters may be obtained from look-up tables representing various models, and a variance of the angular parameter values for each model may be calculated. A low variance obtained from a look-up table is indicative that the model used to populate the look-up table is a good representation of the actual channel. In a network comprising a first node incorporating an antenna array and a second node, the first node may inform the second node about the type of signal distribution of the channel. This information is used by the second node to select the antenna processing type.