MathWorks' RF Blockset Models of Analog Devices RF Agile Transceivers AD9361 and AD9371 can be installed from within MATLAB using the add-on explorer, as shown below:
Next, search for RF Blockset Models for Analog Devices RF Transceivers and select it:
Finally, click on the install button and follow the instructions:
If the installer fails, please contact MathWorks support.