Browse > Article
http://dx.doi.org/10.9766/KIMST.2022.25.1.023

Interference Analysis Among Waveforms and Modulation Methods of Concurrently Operated Pulse Doppler Radars  

Kim, Eun Hee (Department of Defense Systems Engineering, Sejong University)
Ryu, Seong Hyun (Radar R&D Center, LIGNEX1, Co., Ltd.)
Kim, Han Saeng (Radar R&D Center, LIGNEX1, Co., Ltd.)
Lee, Ki Won (Radar R&D Center, LIGNEX1, Co., Ltd.)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.25, no.1, 2022 , pp. 23-29 More about this Journal
Abstract
As the application field of radar is expanded and the bandwidth increases, the number of radar sensors operating at the same frequency is continuously increasing. In this paper, we propose a method of analyzing interference when two pulse doppler radars are operated at the same frequency with different waveform which are designed independently. In addition, we show that even for a previously designed LFM waveforms, the interference can be suppressed without affecting the performance by changing the sign of the frequency slope by increasing/decreasing, or by modulating the pulses by the different codes. The interference suppression by different slopes is more effective for similar waveform and the suppression by the codes increases as the number of pulses increases. We expect this result can be extended to the cases where multiple radars are operated at the same frequency.
Keywords
Pulse Doppler Radar Waveform; Interference; LFM Modulation; Binary Code Optimization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 K. Rambach and B. Yang, "MIMO Radar: Time Division Multiplexing vs. Code Division Multiplexing," Conf. on Radar Systems(Radar 2017), Belfast, UK, October, pp. 1-5. 2017.
2 Jin Mo Yang, Whan Woo Kim, "A Study on Radar Waveform - Polyphase Sequence," Journal of the Korea Institute of Military Science and Technology, Vol. 13, No. 4, pp. 673-682, 2010.
3 E. H. Kim, S. B. Kim, S. S. Han, S. J. Shin, and S. R. Oh, "Design of Polyphase Codes Using Simulated Annealing," The Journal of Korean Institute of Electromagnetic Engineering and Science, Vol. 31, No. 4, pp. 383-393, Apr. 2020.   DOI
4 H. Deng, "Polyphase Code Design for Orthogonal Netted Radar Systems," IEEE Transactions on Signal Processing, Vol. 52, No. 11, pp. 3126-3135, Nov. 2004.   DOI
5 E. Yang, H. Lee, J. Song, "Maximum Likelihood Based Doppler Estimation and Target Detection with Pulse Code Modulated Waveform," The Journal of Korean Institute of Electromagnetic Engineering and Science, Vol. 25, No. 12, pp. 1275-1283, 2014.   DOI
6 M. Goppelt, H. Blocher, and W. Menzel, "Automotive Radar-Investigation of Mutual Interference Mechanisms," Advances in Radio Science, 8(B. 3), pp. 55-60, 2010.   DOI
7 Z. Geng, "Evolution of Netted Radar Systems," IEEE Access, Vol. 8 pp. 124961-124977, 2020.   DOI
8 H. He, P. Stoica, and J. Li, "Designing Unimodular Sequence Sets with Good Correlations: Including an Application to MIMO Radar," IEEE Transactions on Signal Processing, Vol. 57, No. 11, pp. 4391-4405, Nov. 2009.   DOI
9 Gini, Fulvio, Antonio De Maio, and Lee Patton, Waveform Design and Diversity for Advanced Radar Systems. London: Institution of Engineering and Technology, 2012.
10 S. Kirkpatrick, C. D. Gelatt Jr., and M. P. Vecchi, "Optimization by Simulated Annealing," Science, Vol. 220, No. 4598, pp. 671-680, May 1983.   DOI
11 E. H. KIM, K. BAIK, "MVDR Code Receiver for Code Multiplexing MIMO Radar," Electronics Letters, Vol. 55, No. 1, pp. 49-51, 2019.   DOI