关键词: 软件无线电，RFID, GA-BP神经网络，调制识别

Abstract: This paper proposed a classification method of RFID(Radio Frectuency Identification) modulation signal hased on software radio. I}he global optimization of the topology of BP(hack propagation) network fusing with GA was proposed, and a recognition classifier of GA-BP nerual network was designed. Compared with traditional algorithms of BP, the method Improves the convergent rate and convergent precision. Moreover, the recognition rate is very high. The result of the experiments proves it can get high classification efficiency under low SNR.

Key words: Software radio, RFID, GA-BP neural network, Modulation recognition