Performance Analysis of OCDM in ISAC Scenario

Area of Science:

• Electrical Engineering
• Signal Processing
• Telecommunications

Background:

• The Internet of Things (IoT) drives demand for reliable communication and sensing.
• Orthogonal Frequency Division Multiplexing (OFDM) faces limitations in complex environments.
• Orthogonal Chirp Division Multiplexing (OCDM) shows promise for Integrated Sensing and Communication (ISAC).

Purpose of the Study:

• To theoretically analyze the communication and sensing performance of OCDM in ISAC.
• To evaluate OCDM's Bit Error Rate (BER) and sensing detection capabilities.
• To compare OCDM with OFDM in challenging communication scenarios.

Main Methods:

• Derivation of a closed-form BER expression for OCDM under equalization.
• Analysis of the ambiguity function for OCDM sensing.
• Evaluation of detection performance using matched filter (MF) and Generalized Likelihood Ratio Test (GLRT) detectors with a constant false alarm rate (CFAR) criterion.

Main Results:

• OCDM achieves comparable sensing performance to OFDM.
• OCDM demonstrates superior communication robustness in complex environments.
• Theoretical analysis provides a framework for OCDM in ISAC.

Conclusions:

• OCDM is a viable waveform for ISAC, offering a balance of communication robustness and sensing performance.
• OCDM presents an advantageous alternative to OFDM for future ISAC systems.
• Further exploration of OCDM's sensing mechanisms is warranted.