Patent attributes
A configuration is provided, including a determination processor 5 that determines, using the values TDOA11,i and TDOA22,j calculated by an autocorrelation processor 4, whether the values TDOA12,k calculated by a cross-correlation processor 3 are time differences of arrival resulting from direct waves emitted from a radio source, and a positioning processor 6 that calculates the location of the radio source, using the values TDOA12,k that are determined by the determination processor 5 as being time differences of arrival resulting from direct waves and selected from among the values TDOA12,k calculated by the cross-correlation processor 3.