Abstract: A multipath suppression device includes: a multipath signal reproducing unit including a correlation operation unit to divide a sampling signal of each of a plurality of received incoming waves by a length of a replica signal to generate a plurality of segments, and perform a correlation operation between each of the generated plurality of segments and the replica signal to acquire a result of the correlation operation, the multipath signal reproducing unit to estimate specifications of a reflected wave from a result of the correlation operation for the number of divisions, and reproduce a multipath signal using the estimated specifications; and a multipath suppression unit to subtract the multipath signal from the sampling signal to acquire a multipath suppression signal.

Abstract: A radar device includes a signal reception unit that acquires reception signals of transmission waves transmitted from transmission antennas, a transmission signal acquisition unit that receives transmission waves transmitted from the transmission antennas by using transmission signal acquisition antennas, and acquires received reception signals as transmission signal replicas, an unnecessary signal suppression unit that suppresses unnecessary signals of the reception signals acquired by the signal reception unit, a cross-correlation operation unit that calculates cross-correlation values between the transmission signal replicas and the reception signals including the suppressed unnecessary signals, and a beam formation unit that forms beams and estimates a direction of a target by using cross-correlation values corresponding to the respective transmission signals.

Abstract: Provided is a displacement measurement device including: a radio wave transmitter installed at a measurement position, which is configured to transmit radio waves of a plurality of frequencies from a transmission antenna; and a radio wave receiver installed at a fixed position. The radio wave transmitter includes: a plurality of reception antennas each configured to output received signals indicating the results of receiving the radio waves of the plurality of frequencies; a relative phase combining unit configured to combine, for the plurality of frequencies, relative phases between the plurality of reception antennas; a relative phase shifting unit configured to shift the relative phase between the plurality of frequencies, which is combined by the relative phase combining unit; and a positioning calculation unit configured to calculate the positioning value of the transmission antenna based on the relative phase shifted by the relative phase shifting unit.