等离子鞘套包覆目标长时间能量聚焦方法
收稿日期: 2022-06-30
修回日期: 2022-08-22
录用日期: 2022-09-13
网络出版日期: 2022-09-30
基金资助
国家自然科学基金(62171349);陕西省自然科学基础研究计划(2020JM-102)
Long-term energy focusing method for target covered by plasma sheath
Received date: 2022-06-30
Revised date: 2022-08-22
Accepted date: 2022-09-13
Online published: 2022-09-30
Supported by
National Natural Science Foundation of China(62171349);Shaanxi Natural Science Basic Research Program(2020JM-102)
当再入物体以高超声速飞行时，其表面被等离子鞘套覆盖。等离子鞘套对雷达回波产生幅度、相位和频率调制，严重影响了雷达对再入目标的可靠探测能力，导致多种雷达探测异常问题。通过建立等离子鞘套包覆目标的雷达回波模型，分析了等离子鞘套对雷达回波产生的影响。提出了一种基于慢时间自相关的多普勒频率对消方法，可以有效的解决非均匀等离子鞘套所引起的雷达回波中脉内多-多普勒频率现象，并运用扩展Keystone变换及变尺度逆傅里叶变换对相关后信号中的耦合项进行解耦，进而实现信号的能量聚焦。通过对多周期回波信号进行仿真分析，验证了本文所提算法的有效性，并结合统计实验分析验证了算法的可靠性，该算法可以通过对等离子鞘套包覆目标进行能量聚焦来完成运动参数的估计。
张廷焜 , 李铮 , 温旭东 , 洪逸清 , 白博文 . 等离子鞘套包覆目标长时间能量聚焦方法[J]. 航空学报, 2022 , 43(S2) : 67 -75 . DOI: 10.7527/S1000-6893.2022.27715
As the reentry object travels at hypersonic speeds， its surface is covered by a plasma sheath. The plasma sheath modulates the radar echo in amplitude， phase and frequency， which seriously affects the reliable detection capability of the radar for re-entry targets and results in various abnormal radar detection problems. In this paper， the influence of the plasma sheath on the radar echo is analyzed by establishing a radar echo model for the target covered by the plasma sheath. A Doppler frequency cancellation method based on slow time autocorrelation is proposed， which can effectively solve the multi-Doppler frequency phenomenon in the radar echo caused by the non-uniform plasma sheath. The extended Keystone transform and the inverse Fourier transform are used to decouple the coupling terms in the correlated signal， thereby realizing energy focusing of the signal. The validity of the algorithm proposed is verified by the simulation analysis of the multi-period echo signal， and the reliability of the algorithm is verified by statistical experimental analysis. This study provides an effective method for the coherent accumulation of the plasma sheath covered target.
| 1 | HARTUNIAN R A, STEWART G. E. FERGASON S D,et al. Causes and mitigation of radio frequency (RF) blackout during reentry of reusable launch vehicles: ATR-2007(5309)-1[R]. El Segundo: Aerospace Corporation, 2007. |
| 2 | DIX D M. Typical values of plasma parameters around a conical re-entry vehicle: AD295429[R]. El Segundo: Aerospace Corporation, 1962. |
| 3 | CLOSE S. Scattering characteristics of high-resolution meteor head echoes detected at multiple frequencies[J]. Journal of Geophysical Research, 2002, 107( A10): 1295. |
| 4 | KERO J, SZASZ C, WANNBERG G, et al. On the meteoric head echo radar cross section angular dependence[J]. Geophysical Research Letters, 2008, 35( 7): 154- 162.. |
| 5 | BAI B W, LI X P, LIU Y M, et al. Effects of reentry plasma sheath on the polarization properties of obliquely incident EM waves[J]. IEEE Transactions on Plasma Science, 2014, 42( 10): 3365- 3372. |
| 6 | SHA Y X, ZHANG H L, GUO X Y, et al. Analyses of electromagnetic properties of a hypersonic object with plasma sheath[J]. IEEE Transactions on Antennas and Propagation, 2019, 67( 4): 2470- 2481. |
| 7 | KOJIMA T, HIGASHI T, ITAKURA K. Reflection and transmission of electromagnetic waves obliquely incident upon a moving compressible plasma slab[J]. IEEE Transactions on Antennas and Propagation, 1972, 20( 3): 398- 400. |
| 8 | LAROUSSI M, ROTH J R. Numerical calculation of the reflection, absorption, and transmission of microwaves by a nonuniform plasma slab[J]. IEEE Transactions on Plasma Science, 1993, 21( 4): 366- 372. |
| 9 | CHEN X Y, LI K X, LIU Y Y, et al. Study of the influence of time-varying plasma sheath on radar echo signal[J]. IEEE Transactions on Plasma Science, 2017, 45( 12): 3166- 3176. |
| 10 | 罗春荣, 丁昌林, 段利兵. “十二五”规划教材: 电动力学[M]. 北京: 电子工业出版社, 2016: 150- 176. |
| LUO C R, DING C L, DUAN L B. 12th Five-Year Plan Textbooks: Electrodynamics[M]. Beijing: Publishing House of Electronics Industry, 2016: 150- 176. | |
| 11 | 曹昌祺. 现代物理学基础丛书: 经典电动力学[M]. 中国北京: 科学出版社, 2009: 167- 180. |
| CAO C Q. Basic series of modern physics: Classical electrodynamics[M]. Beijing: Science Press, 2009: 167- 180. | |
| 12 | LIU S H, GUO L X. Analyzing the electromagnetic scattering characteristics for 3-D inhomogeneous plasma sheath based on PO method[J]. IEEE Transactions on Plasma Science, 2016, 44( 11): 2838- 2843. |
| 13 | ZHANG X, LIU Y M, BAI B W, et al. Establishment of a wideband radar scattering center model of a plasma sheath[J]. IEEE Access, 20197: 140402- 140410. |
| 14 | DING Y, BAI B W, GAO H J, et al. An analysis of radar detection on a plasma sheath covered reentry target[J]. IEEE Transactions on Aerospace and Electronic Systems, 2021, 57( 6): 4255- 4268. |
| 15 | DING Y, BAI B W, GAO H J, et al. Method of detecting a target enveloped by a plasma sheath based on Doppler frequency compensation[J]. IEEE Transactions on Plasma Science, 2020, 48( 12): 4103- 4111. |
| 16 | YAO S, LIU Y H, JIANG Y X, et al. An improved signal-dependent quadratic time-frequency distribution using regional compact kernels for analysis of nonstationary multicomponent LFM signals[J]. Digital Signal Processing, 2021, 116: 103131. |
| 17 | GU T, LIAO G S, LI Y C, et al. Parameter estimate of multi-component LFM signals based on GAPCK[J]. Digital Signal Processing, 2020, 100: 102683. |
| 18 | WAN J, ZHOU Y, ZHANG L R, et al. A Doppler ambiguity tolerated method for radar sensor maneuvering target focusing and detection[J]. IEEE Sensors Journal, 2019, 19( 16): 6691- 6704. |
| 19 | 陈伟芳, 赵文文. 稀薄气体动力矩方法及数值模拟[M]. 北京: 科学出版社, 2017. |
| CHEN W F, ZHAO W W. Rarefied gas dynamic moment method and numerical simulation[M]. Beijing: Science Press, 2017. | |
| 20 | PERRY R P, DIPIETRO R C, FANTE R L. Coherent integration with range migration using keystone formatting[C]∥ 2007 IEEE Radar Conference. Piscataway: IEEE Press, 2007: 863- 868. |
| 21 | ZHANG S S, ZENG T, LONG T, et al. Dim target detection based on keystone transform[C]∥ IEEE International Radar Conference. Piscataway: IEEE Press, 2005: 889- 894. |
| 22 | SKOLNIK M I. Radar handbook[M]. 2nd ed. New York: McGraw-Hill, 1990. |
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