Abstract:

The matched filter of the matched filterable chaotic radar system can be implemented by lowcost analog devices and received widespread attention. But the transmitted signal of this system is not a bandlimited signal, causing signals in the process of transformation and propagation prone to spectrum leak and distortion. To solve the problem, this paper proposes a waveform design method based on chaotic synchronization and filtering. In the radar transmitter, make the chaotic signal become a bandlimited signal by filtering to shape the spectrum of it; in the receiver, use synchronization and filtering to recover the chaotic signal. Compared with traditional signal design methods in the digital domain, the proposed method is implemented in the analog domain, with an advantage of lowcost. In addition, the proposed method is still valid when the SNR is as low as -20 dB. Compared with the source signal process matched filtering directly, the maximum side lobe of the transformed signal in this method after matched filtering is elevated slightly.