METHOD FOR ESTIMATING ORIENTATION USING NARROWBAND SIGNAL

PURPOSE:To enable a direction of a target signal line to be estimated highly accurately by performing compensation and then eliminating an influence of an error of estimation orientation for a direction of arrival which is estimated by using a representative frequency for a frequency region phase adjustment. CONSTITUTION:A frequency divider 2 is connected to sensors 11-1N of a line array 1 and a frequency region phase adjuster 3 which performs phase adjustment of a signal at a frequency region is connected the output side. Further, a frequency analyzer 4 is connected to the frequency region phase adjuster 3 and a peak detector 6 is connected to the frequency analyzer 4 through a power calculator 5. Further, an orientation compensation means 7 is provided at an output side of the peak detector 6 and an output terminal 8 is connected to an output side of the orientation compensation means 7. By providing the compensation means 7, an influence of estimated orientation generated by using a representative frequency of frequency division for the frequency region phase adjuster 3 can be eliminated and a direction of a target signal source can be estimated highly accurately.