Time-frequency-interleaved radio signals

The dataset construction follows the design principles of the RF Challenge, and three representative combinations of radio signals are selected: 8PSK+OFDM-16QAM, QPSK+OFDM-16QAM, and QPSK+16QAM. The signal-to-noise ratio (SNR) ranges from 0 dB to 20 dB with a step of 2 dB, and baseband time\u2013frequency interleaved signals are generated accordingly. The bandwidth of the OFDM-16QAM signal is 19.92 MHz, while the 16QAM and QPSK signals have a bandwidth of 2.34 MHz.For the QPSK+16QAM mixture, the QPSK signal is modulated with a 1.5 MHz carrier to simulate a partially overlapped frequency-domain scenario. In contrast, for the 8PSK+OFDM-16QAM and QPSK+OFDM-16QAM combinations, both signals are centered at 0 Hz to simulate completely overlapped frequency-domain conditions.