Examination of signal separation/demodulation method of multi-value modulation sensor terminal signal using STFT in storage batch signal processing
Toru Nishiyama, Takuyuki Hirakawa, Syo Nakaie, Shigeru Tomisato, Satoshi Denno, Kazuhiro Uehara · IEICE Communications Express · 2021
In this paper, in order to establish the storage batch signal processing technology on the network, the method of separating the IoT/M2M terminal signal that collided or interfered and the method of demodulating the data after signal separation, which cannot be realized by the conventional receivers. We proposed a method of signal separation by feature quantity extraction using short-time Fourier transform and the method of using the obtained feature quantity for demodulation. In addition, the effectiveness of the proposed method for multi-valued modulated signals will be evaluated by computer simulation.