Chaotic optoelectronic oscillators-based dual-function radar-communication system

Chaotic optoelectronic oscillators-based dual-function radar-communication system

연구 분야: Infrastructure

학회: Science China Information Sciences

We propose and demonstrate a novel dual-function radar-communication (DFRC) system based on chaotic optoelectronic oscillators (OEOs). Differing from conventional optical chaos communication systems, wherein the time delay signature (TDS) of chaotic signals produced by optical or optoelectronic feedback is deemed detrimental, in the proposed DFRC system, two independent OEO-generated chaotic signals with different TDSs are encoded as bits “0” and “1” for communication, and simultaneously utilized for radar ranging. The numerical simulation results demonstrate that the proposed system can effectively perform information-hiding transmission as well as target ranging functions simultaneously, and satisfactory performance for both functions can be maintained even under low signal-to-noise ratio scenarios. In addition, a TDS-based sidelobe suppression algorithm is proposed to enhance the range performance, with which the TDS-induced sidelobes can be efficiently suppressed. A data rate of 250 Mbps, a radar ranging resolution of 0.013 m, and a detection probability of ranging above 0.95 in a dual-target scenario are achieved with the appropriate system parameters and the aid of the TDS-SS algorithm.