An on-site measuring method of radiation emission based on the adaptive spatial filtering technology

This paper proposed a measurement method of interferences suppression for on-site radiation emission test. This method firstly acquires the multi-channel receiving data, then the DOA of EUT radiated signal and other interference signals can be achieved by MUSIC spatial spectrum estimation technique. And MVDR beam-forming algorithm was taken to form the beam pattern nulls in the direction of the interference signals, thus the suppression of interferences was realized. The suppression effects of various different interferences were simulated. The results show that the method not only can simultaneously to suppress multiple interference sources, but also can effectively restrain the co-channel interference and broadband disturbance in the case of ensuring the radiation characteristics of EUT without distortion.