Comparison of Ambiguity Functions for OFDM and OCDM Integrated Radar-Communication Systems

In the field of radar-communication integration, both OFDM (Orthogonal Frequency Division Multiplexing) and OCDM (Optical Code Division Multiplexing) are prominent modulation techniques. OFDM primarily finds applications in wireless communication systems, while OCDM is better suited for optical fiber communication environments. Both technologies can be effectively employed in radar-communication systems to mitigate multipath interference and enhance signal reliability and accuracy. From an implementation perspective, OFDM systems typically involve inverse fast Fourier transform (IFFT) operations for signal generation and FFT for reception, with cyclic prefix insertion to combat intersymbol interference. OCDM implementations often utilize optical orthogonal codes or spreading sequences with specific correlation properties to enable multiple access and interference rejection. The comparative study of ambiguity functions for OFDM and OCDM integrated radar-communication systems holds significant theoretical importance and practical application value. Key performance metrics include range resolution, Doppler tolerance, and sidelobe suppression characteristics, which can be evaluated through MATLAB simulations using signal processing toolboxes and custom algorithm development.