Abstract
This study proposes a novel approach to suppress noise jamming and smart jamming. The traditional method of using auxiliary channels to cancel interference requires pure interference samples to calculate weights, which is almost impossible for pulsed interference signals. In this work, to avoid the difficulty of choosing suitable interference samples, we construct the parameterized expected signal according to the time-delay relation between target reflecting echo and transmitted signal. The objective function is established in the form of the minimum mean square error between the recovered signal and the expected signal. The optimization problem is solved by an alternating iteration method. Simulation results demonstrate that the proposed method achieves excellent performance for suppressing noise jamming and smart jamming and is not sensitive to signal-to-noise ratio and jamming-to-noise ratio. The processing results of the measured data show that the method has a certain practical application value.
Highlights
The complex electromagnetic interference environment seriously threatens the survival and performance of the radar system [1].Noise jamming (NJ) is a kind of noise-like signal, which greatly reduces the signal-tonoise ratio (SNR) on hostile radar receivers, making it difficult to detect valuable signals or generate errors [2]
Adjust Am,x to change the SNR from − 12dB to 8dB in the scenario where JNR is 10 dB, 15 dB, and 25 dB, respectively, the echo was processed with the proposed method, and the signal-to-jamming and noise ratio (SJNR) before and after interference suppression was calculated as an evaluation index
5 Conclusion In this paper, the method for suppressing NJ and smart jamming is studied based on radar transmitted waveform matching
Summary
The complex electromagnetic interference environment seriously threatens the survival and performance of the radar system [1].Noise jamming (NJ) is a kind of noise-like signal, which greatly reduces the signal-tonoise ratio (SNR) on hostile radar receivers, making it difficult to detect valuable signals or generate errors [2]. Interference suppression is transformed into the problem of target signal recovery based on radar transmitted waveform matching. Am,x, Am,j represent target signal amplitude and jamming amplitude in the main channel considering transmission power, antenna gain, working wavelength, radar cross-section (RCS) and other factors except for the polarization information.
Sign-in/Register to view highlights & summary 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.
