Spatially dependent ACLR modelling

In a multi-antenna transmitter system, the effective combined signal in the air will consist of a combination of signals. These signals will for example experience different path loss and then be combined at the receiver location. This results in a combined signal that may be different than a conducted signal at the antenna port. This model was used to investigate by how much the over the air signal and conducted signal differ at various points in space. This paper describes the work done using measurements and modelling to compare conducted measurements and over the air measurements. The investigations, and results discussed in this paper are primarily focused on Adjacent Channel Leakage power Ratio and emissions.