METHOD AND APPARATUS PERFORMING TRANSMITTING AND RECEIVING SIMULTANEOUSLY IN SAME FREQUENCY BAND

摘要

PURPOSE: A method for simultaneously performing transmission and reception in the same frequency band capable of increasing frequency use efficiency and an apparatus thereof are provided to utilize an electromagnetic field polarization, thereby simultaneously performing transmission and reception in the same frequency band. CONSTITUTION: A second communications device(150) generates a single polarization using a dual polarization transmission antenna. The second communications device transmits a signal to a first communications device(100) (S100). The transmitted signal of the second communications device passing through a radio channel is received by the dual polarization reception antenna of the first communications device. The first communications device performs polarization filtering by tracking the principal axis of the polarization of the signal(S105). The first communications device generates a polarization meeting at completely right angle with the principal axis of a tracked reception polarization using the dual polarization transmission antenna(S110). The second communications device performs adaptive polarization tracking and polarization filtering using the dual polarization filtering reception antenna(S115). [Reference numerals] (100) First communications device; (150) Second communications device; (S100) Single polarization transmission; (S105,S115) Adaptive polarization tracking & polarization filtering; (S110) Polarization transmission perpendicular to the tracked polarization