A signal analysis method based on multiple signal classification(MUSIC)is proposed for distilling the site attenuation(SA)of direct wave from SA measurement with antenna at fixed height. Based on free-space site attennation mathematic model,the far field antenna factor was calculated using the direct wave SA. A half-wave dipole antenna with tune frequency 500,MHz was used in experimental measurement in the frequency range of 300,MHz~1,GHz. The direct wave SA agreed well with simulation with the method of mo...