RADIO COMMUNICATIONS SYSTEM

PROBLEM TO BE SOLVED: To provide a radio communications system capable of stably communicating even under an environment with a high level of noise.SOLUTION: A wireless communication terminal 1 transmits a non-inverted modulation signal and an inverted modulation signal by using two antennas 11, 12; a wireless communication terminal 2 receives reception signals e,e,e,eby using four antennas 21, 22, 23, 24; two-input separation parts 251, 252 obtain gains which minimizes a variation of an amplitude of the difference between reception signals e,eand a variation of the difference between reception signals e,e, respectively, and demodulates a separation signal output from either of two-input signal separation parts 251 and 252. Thereby, it is possible to provide a wireless communications system capable of improving signal-to-noise ratio without being restricted by a positional relationship between antennas 11, 12 of the wireless communication terminal 1 and antennas 21, 22, 23, 24 of the wireless communication terminal 2, and no matter where a noise source is present.