Two Dimensional Geometric Feature Inversion Method for Midcourse Target Based on ISAR Image
-
摘要: 該文針對(duì)彈道導(dǎo)彈防御系統(tǒng)的目標(biāo)識(shí)別問題，研究了中段目標(biāo)的2維幾何特征反演方法。基于中段目標(biāo)的外形特征，提出了一種描述目標(biāo)2維幾何結(jié)構(gòu)的穩(wěn)定特征量，該特征量不受目標(biāo)姿態(tài)變化和雷達(dá)工作條件的影響?；谥卸文繕?biāo)的電磁散射特性，建立了目標(biāo)在不同姿態(tài)下的ISAR成像結(jié)果與目標(biāo)2維幾何特征的映射關(guān)系，進(jìn)而提出一種基于ISAR像的中段目標(biāo)2維幾何特征反演方法，能夠穩(wěn)定地反演出中段目標(biāo)飛行過程中所有姿態(tài)下的2維幾何特征。通過電磁計(jì)算數(shù)據(jù)和暗室測(cè)量數(shù)據(jù)驗(yàn)證了所提方法的有效性和穩(wěn)定性。
-
關(guān)鍵詞:
- 目標(biāo)識(shí)別 /
- 中段目標(biāo) /
- 2維幾何特征 /
- ISAR圖像 /
- 反演
Abstract: This paper focuses on Two Dimensional (2D) geometric feature inversion method of midcourse targets, serving for the target recognition problem of ballistic missile defense system. Based on the figuration characteristic of midcourse targets, a stable characteristic quantity, which describes the 2D geometric configuration of target, is proposed. The characteristic quantity is independent on the target attitude variation and radar work condition. Then the expression form of 2D geometric feature in radar image is analyzed with respect to different intervals, the mapping relationships between ISAR images under various target attitudes and the 2D geometric feature of target are established, and an 2D geometric feature inversion method for midcourse targets based on ISAR image is proposed. The proposed method can stably estimate the 2D geometric feature of midcourse targets under all attitudes during the midcourse flight, which is verified by the simulation experiments with electromagnetic computed data and measured data in anechoic chamber.-
Key words:
- Target recognition /
- Midcourse target /
- Two-Dimensional (2D) geometric feature /
- ISAR image /
- Inversion
-
計(jì)量
- 文章訪問數(shù): 1938
- HTML全文瀏覽量: 253
- PDF下載量: 390
- 被引次數(shù): 0
下載:
