Aiming at the difficult problem of basic probability assignment function(BPAF) obtaining, three methods of BPAF
obtaining based on fuzzy sets, gray association and character parameters resemble are analyzed. Mathematics expression
of obtaining BPAF is induced. Distributed sensors information fusion emitter identification model based on three BPAF
obtaining methods is constructed. Multi-periods information fusion in the time domain and distribution multi-sensors fusion
in the spatial domain are carried out in the identification process. Finally, identification rate in different signal noise ratio
(SNR) is compared with template matching method, and simulation results show that the proposed emitter identification
method is effective and the emitter accurate identification rate is above 90%.