Photonic-assisted integrated system for communication and sensing based on time-frequency division flexibly...

Area of Science:

• Wireless communication
• Signal processing
• Radar technology

Background:

• The convergence of communication and sensing is crucial for advanced 5G and 6G applications.
• Existing systems often face limitations in supporting diverse communication rates and sensing resolutions simultaneously.

Purpose of the Study:

• To propose a novel integrated sensing and communication (ISAC) system.
• To demonstrate a flexible time-frequency-division hybrid multiplexing (TFDM) approach for ISAC.
• To achieve simultaneous high-rate data transmission and high-resolution radar sensing.

Main Methods:

• Generation of TFDM signals by combining linear frequency modulation (LFM) and orthogonal frequency division multiplexing (OFDM) signals using inverse fast Fourier transform (IFFT).
• Dynamic allocation of carriers and time slots for LFM and OFDM components.
• Simulation and experimental verification in the W-band over a 10 km optical fiber link.

Main Results:

• Successfully realized communication data rates ranging from 15.9 to 47.8 Gbit/s.
• Achieved radar ranging resolutions from 7.5 cm down to 1.875 cm.
• Demonstrated the dynamic configurability of the TFDM signal for adaptable communication and sensing performance.

Conclusions:

• The proposed TFDM-based ISAC system effectively supports diverse communication rates and sensing resolutions.
• This integrated approach offers a promising solution for intelligent services in future wireless networks.
• The system's flexibility in resource allocation enhances its applicability across various scenarios.