Golay complementary sequence and constant envelope orthogonal frequency-division multiplexing-based for integrated sensing and communication with mutual information analysis

The design of waveforms plays a critical role in integrated sensing and communication (ISAC) systems. An ISAC waveform with a 0dB peak-to-average power ratio (PAPR) is designed by combining a Golay complementary sequence with a constant envelope orthogonal frequency-division multiplexing. By adjusting the phase modulation parameters, this waveform allows for a trade-offs between communication and sensing capabilities. The authors focus on several key performance metrics for the proposed ISAC waveform, notably using mutual information as a holistic performance indicator to assess both sensing and communication effectiveness. Through extensive numerical simulations, the authors demonstrate that the ISAC waveform significantly enhances detection probability compared to traditional phase-modulated waveforms. The findings suggest that this approach is beneficial for designing low PAPR phase-modulated ISAC waveforms, enhancing both the functionality and efficiency of ISAC systems.