Abstract
As the use of radar and radar jammers increases, a radar device is likely to face interference from jammers or other radar devices. Traditional phase-coded pulse compression radar devices are widely used, but these tools struggle to overcome jamming and mutual interference. To solve this problem, we propose a novel chaotic-encrypted pulse compression radar signal based on radar identity (ID). Each radar has its own ID, which is encrypted with different chaotic binary sequences in every pulse period. The ambiguity function calculated for the coded radar signal is thumbtack-shaped, indicating that the signal has a good resolution. The received signal is used to range and decrypt in two channels: the range channel and the radar ID channel. The signals of the two channels are analyzed separately. Analyses of anti-barrage jamming and anti-mutual interference show that both channels perform well in terms of antijamming, while the antijamming ability is influenced by the processing gain, bit error rate (BER) and correlation function. In addition, the dual-channel antijamming method further improves the radar antijamming ability. The simulation result verifies the strong antijamming ability and high range resolution of the proposed radar signal, and the proposed antijamming method performs much better than the traditional phase-coded pulse compression radar signal in the antijamming scenario.
Highlights
Phase-coded pulse compression radar has been widely applied due to its high range-Doppler resolution, large unambiguous range and low probability of intercept
Brooker [10] analyzed the mutual interference of radar systems, showing that the signal of one radar device could be reflected into another radar device and become a false target through a radar antenna, especially when the two radar devices are of the same type
Based on the analysis above, this paper presents a novel pulse compression radar signal based on radar identity (ID) and chaotic encryption
Summary
Phase-coded pulse compression radar has been widely applied due to its high range-Doppler resolution, large unambiguous range and low probability of intercept. A design to enhance the antijamming performance of a pulse compression signal with low probability of intercept and to reduce the mutual interference between two radar signals is urgently needed to improve the radar antijamming ability. Yin et al [15] designed a frequency-modulated radar waveform based on sampled chaotic series, and on the basis of frequency modulation, Zeng et al [16] proposed a novel chaos-based stepped frequency synthesized wideband radar signal This approach effectively overcame the range-Doppler coupling caused by linear frequency modulation and provided a thumbtackshaped ambiguity function; the computational complexity limits the application of the method. The outputs of the channels are combined to achieve radar antijamming In this way, the proposed method significantly decreases the probability of interference from other radar devices or jammers. Radar using this method will possess high resolution and a strong antijamming ability
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
