CPC H04B 7/0615 (2013.01) [H04B 7/0639 (2013.01); H04B 7/0695 (2013.01)] | 19 Claims |
1. An operating method of a communication device for providing a beamformed transmission signal to a plurality of terminals, the operating method comprising:
determining a target transmission vector based on an area restriction condition, the area restriction condition being defined such that a strength of the beamformed transmission signal with respect to each of the plurality of terminals is amplified based on constructive interference generated from other terminals among the plurality of terminals;
generating a beam selection matrix for selecting a portion of antennas from among a plurality of antennas based on the target transmission vector and a beam selection condition;
generating a precoding matrix based on the target transmission vector and the beam selection matrix; and
generating the beamformed transmission signal based on the beam selection matrix and the precoding matrix.
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