Beamforming at the Transmitter

I'm interested in implementing a narrowband phase shift beamformer at a tx ULA antenna array. The example https://www.mathworks.com/help/phased/ref/phased.phaseshiftbeamformer-system-object.html only shows the beamformer after signal collection. However, a tx will be radiating a signal instead so I'm wondering how exactly to apply the beamformer when transmitting a signal via antenna array.