Patent ID: 8130147

Claim:
A signal wave arrival angle measuring device, comprising: a sensor group converting a signal wave of an observation target to an electrical signal; an observation data vector generation section generating an observation data vector necessary for an angle measurement of said signal wave from the electrical signal converted at said sensor group; an ESPRIT angle measurement processing section calculating an arrival angle of said signal wave through an ESPRIT angle measurement processing from the observation data vector generated by said observation data vector section; an arriving signal wave estimation section estimating information other than the arrival angle of said arriving signal wave from an angle measurement processing process data of the ESPRIT angle measurement processing at said ESPRIT angle measurement processing section; and a reliability determination section in which, based on an estimation result of said arriving signal wave estimation section, it is determined whether or not an angle measurement result of said arrival angle said ESPRIT angle measurement processing section calculates is correct, to exclude an erroneous angle measurement result, wherein said arriving signal wave estimation section includes an array response vector estimation section of the arriving signal wave for estimating an array response vector of the arriving signal from the process in which said ESPRIT angle measurement processing section calculates the arrival angle of said signal wave; and wherein said reliability determination section, based on an array response vector estimation result estimated by said array response vector estimation section, determines whether or not said angle measurement result is correct.