I'd like to create a 2x2 MIMO HIL example using the ZC706 + AD-FMCOMMS3-EBZ board.
Most of the simulink models that simulate a MIMO channel provide perfect channel state information (CSI) back to the receiver.
For example, refer the Concatenated OSTBC with TCM - MATLAB & Simulink Example
Q01: If I were to adapt this model for use with the AD-FMCOMMS3-EBZ, in a 2x1 or 2x2 MIMO configuration, how can I go about computing the CSI for the OSTBC Combiner block on the receiver side?
In terms of book references, I'm using the following:
Additionally, looking at the 4G LTE Advanced and 802.11n WiFi standards, the pilot signal is used to compute the CSI on the receiver side.
I would also need to transmit the CSI back to the transmitter in the model, to implement closed-loop control.
Q02: What elements constitute the CSI? e.g. delays, gains, etc?
Q03: Is there hardware support to compute elements of the CSI and receive it directly from the AD9361 RF transceiver for each channel?