Beam-space mimo-based communication device, and operation method therefor

Disclosed are a beam-space MIMO-based communication device, and an operation method therefor. The communication device according to an embodiment of the present invention may comprise: a beam-space MIMO antenna containing an active antenna and a plurality of parasitic antennas which mutually couple to the active antenna; a beam-space MIMO baseband circuit for generating a load impedance vector for the plurality of parasitic antennas using a signal in a time region transmitted from a modem circuit; and a beam-space MIMO RF circuit for loading, on each of the plurality of parasitic antennas, the load impedance value corresponding to each of the plurality of parasitic antennas on the basis of the load impedance vector.