Abstract
In this article, we propose the utilization of chaos-based frequency modulated (CBFM) waveforms for joint monostatic and bistatic radar-communication systems. Short-duration pulses generated via chaotic oscillators are used for wideband radar imaging, while information is embedded in the pulses using chaos shift keying (CSK). A self-synchronization technique for chaotic systems decodes the information at the communication receiver and reconstructs the transmitted waveform at the bistatic radar receiver. Using a nonlinear detection scheme, we show that the CBFM waveforms closely follow the theoretical bit-error rate (BER) associated with bipolar phase-shift keying (BPSK). We utilize the same nonlinear detection scheme to optimize the target detection at the bistatic radar receiver. The ambiguity function for both the monostatic and bistatic cases resembles a thumbtack ambiguity function with a pseudo-random sidelobe distribution. Furthermore, we characterize the high-resolution imaging capability of the CBFM waveforms in the presence of noise and considering a complex target.
Highlights
Due to an exponential increase in the utilization of communication devices and limitations on the electromagnetic spectrum, there is tremendous demand for radio frequency systems [1] to operate simultaneously without any mutual interference
We presented a waveform design for joint monostatic radar-communication and bistatic radar-communication systems
The generation of such a waveform is possible using a chaotic oscillator modeled as nonlinear differential equations
Summary
Due to an exponential increase in the utilization of communication devices and limitations on the electromagnetic spectrum, there is tremendous demand for radio frequency systems [1] to operate simultaneously without any mutual interference. A transceiver architecture along with a dual-functional radar-communication (DFRC) system using a hybrid analog-digital beamforming technique in mm waveband is proposed in [8]. With many of these proposed techniques, the complexities associated with the transmitter hardware can be reduced along with the operational and functional costs [8]. The second approach is a more efficient way in which a single transmitter is used for dual radar-communication functioning. An overview of dual-function radar-communications (DFRC) and various waveform schemes are noted in [19]. Noise-like waveforms that are inherently wideband are used for simultaneous radar and communication systems [22]. Their advantages for dual-function radar communications are not fully explored
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