An adaptive receiver based on software defined radio techniques

We developed an identification algorithm that can distinguish twelve kinds of modulation modes using a blind process aimed at automatic identification of unknown modulated signals. We also developed an adaptive receiver, installed this algorithm, and we carried out an experiment to evaluate the receiver´s ability. By the result of the validation experiment, for linear digital modulation modes with S/N ⩾ 3 dB, for GMSK of nonlinear digital modulation modes with S/N ⩾ 18 dB, and for the FM of analog modulation modes with S/N ⩾ 12 dB, we got a performance of identification probability of over 90 % respectively. Furthermore, based on the identification results, we evaluated the adaptive demodulation process by using the developed system and confirmed its effectiveness