Photonics-aided integrated sensing and communication system in W-band using probabilistic shaping DMT waveform with...

Area of Science:

• Photonics
• Integrated Sensing and Communication (ISAC)
• Millimeter-wave (mmWave) technology

Background:

• Conventional ISAC architectures suffer from spectral fragmentation, limiting time-frequency resource utilization.
• Developing unified waveform solutions for 6G mmWave ISAC systems is crucial for high precision and low complexity.

Purpose of the Study:

• To experimentally demonstrate a photonics-aided W-band ISAC system using a discrete multitone (DMT) signal.
• To overcome spectral fragmentation limitations in ISAC through an innovative truncated DMT waveform.
• To enhance communication performance and preserve sensing bandwidth utilization via co-optimized signal truncation and probabilistic shaping (PS) 64-QAM modulation.

Main Methods:

• Employed a discrete multitone (DMT) signal for the W-band ISAC system.
• Utilized an innovative truncated DMT waveform for full time-frequency resource sharing.
• Co-optimized signal truncation with probabilistic shaping (PS) 64-QAM modulation.
• Used a low-cost envelope detector (ED) for signal detection.

Main Results:

• Achieved a transmission rate of 16.15 Gbit/s at a range of 50 m.
• Obtained a ranging resolution of 1.25 cm.
• Demonstrated triple-target imaging through pulse compression.
• Showcased significant improvement in time-frequency resource utilization.

Conclusions:

• The proposed scheme offers a unified waveform solution for 6G mmWave ISAC systems.
• The system maintains hardware simplicity while achieving high precision and low complexity.
• This approach effectively overcomes spectral fragmentation limitations in conventional ISAC architectures.