Patent ID: 8805644

Claim:
A digital spectrum analysis apparatus for multi-channel direction finding, comprising: a multi-channel unit configured to convert signals inputted from antennas into digital signals, reduce a sampling rate of the digital signals by using a digital down converter (DDC), and convert the digital signals into baseband complex signals, and having a plurality of channels of which the number is equal to or less than that of the antennas; a DF estimator configured to estimate the direction of the signal using a predetermined direction finding method; a spectrum processing unit configured to map any one of a bearing and a power level of the baseband complex signal into coordinate system, and allocate different colors to one of the bearings and the power levels depending on the accumulation ratio of one of the bearing and the power level in order to estimate the bearing of the signal; and a display unit configured to display the power level and the bearing with colors in order to estimate the bearing of the signal.