一種空間微動目標寬帶雷達干涉三維成像方法

陳春暉; 張群; 羅迎; 孫玉雪

doi:10.11999/JEIT161025

一種空間微動目標寬帶雷達干涉三維成像方法

doi: 10.11999/JEIT161025

陳春暉¹,
張群^1, ,,
羅迎¹,
孫玉雪¹

基金項目:

國家自然科學基金(61571457)

計量
- 文章訪問數(shù): 1296
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-10-08
- 修回日期: 2016-11-17
- 刊出日期: 2016-12-19

Interferometric Three Dimensional Imaging Method for Space Micro-motion Target Based on Wideband Radar

Funds:

The National Natural Science Foundation of China (61571457)

摘要

摘要: 空間微動目標3維成像在目標特征信息感知方面具有優(yōu)勢，對于實施空間目標成像、分類、識別等任務具有重要現(xiàn)實意義。據(jù)此，該文針對L型天線陣列成像系統(tǒng)，提出一種基于改進的粒子群優(yōu)化的空間微動目標寬帶雷達干涉式3維成像方法。首先，分析了目標回波信號的微多普勒特性，建立參數(shù)化表征模型。其次，基于所提優(yōu)化算法重構(gòu)各天線回波信號的微多普勒相位項，通過對各回波信號相位項的干涉處理，獲得干涉相位差，并推導干涉相位差與目標空間坐標的關(guān)系，從而重構(gòu)真實3維坐標，獲得微動目標3維圖像。相較于已有方法，所提方法基于干涉式成像思想，在無遮擋和有遮擋效應的條件下，均可重構(gòu)微動目標真實空間坐標和3維圖像，并且具有較好的魯棒性。最后，仿真計算驗證了該方法的有效性。
- 雷達信號處理 /
- 3維成像 /
- 干涉成像 /
- 微動目標 /
- 微多普勒效應
Abstract: Three dimensional imaging of space micro-motion target has significant advantages on target information awareness, which is crucial to effectively realize space target imaging, classification and recognition. In this paper, through the L type antenna array imaging system, an interferometric three dimensional imaging method for space micro-motion target is proposed based on the improved Particle Swarm Optimization (PSO) algorithm. Firstly, the Doppler effect in the received signal is analyzed, and the corresponding parametric model is established. Then, the Doppler phase term of the received signal is reconstructed by using the proposed optimization method. Through interferometric processing and analyzing the quantitative relationship between interferometric phase difference and real coordinate, the three dimensional coordinates and image can be obtained. Compared with the existing methods, the proposed method can reconstruct the real coordinates and three dimensional image of micro-motion target with and without occlusion effect. It also has good robustness. Finally, simulations validate the effectiveness of the proposed method.
- Radar signal processing /
- Three dimensional imaging /
- Interferometric imaging /
- Micro-motion target /
- Micro-Doppler effect

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