The RF front end function of the TitanMIMO-4 is supplied by the Radio 420M. It is a powerful multi-mode software defined radio (SDR) transceiver with two channels (2 Tx and 2 Rx).
The Radio 420M is built around the multi-standard, multi-band Lime Microsystems LMS6002D RF transceiver IC, which supports broadband coverage as well as FDD and TDD full duplex modes of operation. The front-end converts bandpass to baseband with no intermediate frequency (IF). I and Q samples are sent to the FPGA on the Perseus 611X for baseband processing or can be transferred to another device. The Radio 420 is ready-to-use and supplies maximum performance due to its included auto-calibration features (IQ imbalance, DC offset and LO-leakage).
Below is a functional diagram of the radio interface.