| 摘要: |
| 在对海洋监视监测的过程中, 高频地波雷达的船只目标检测能力与其对海杂波的抑制能力密切相关。但是, 传统海杂波时域抑制方法存在目标回波参数与海杂波相近时难以区分其各自分量,对消时目标被误消除的问题。针对上述问题, 本文提出了一种适用于高频地波雷达海杂波的边界约束循环对消方法。该方法综合海杂波频移理论和实际海杂波特性分析制定出边界条件, 约束建模对消过程, 实现海杂波分量的抑制。实测地波雷达数据和船舶自动识别系统(AIS)数据检验的结果表明,本文方法克服了传统方法的不足且信杂比改善更加稳定, 能够更加有效地实现海杂波循环对消。 |
| 关键词: 海杂波 高频地波雷达 船只探测 循环对消 |
| DOI：10.11693/hyhz20141200357 |
| 分类号: |
| 基金项目:国家自然科学基金项目,61171180号;中央级公益性科研院所基本科研业务费专项项目,0213T03号。 |
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| BOUNDARY-CONSTRAINED SEA CLUTTER CIRCULATION CANCELLATION BY HIGH-FREQUENCY SURFACE WAVE RADAR |
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WANG Yi-Ming1,2, MAO Xing-Peng2, ZHANG Jie1, JI Yong-Gang1, CHU Xiao-Liang1
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1.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;2.Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| In monitoring and surveillance of the sea surface with high-frequency surface wave radar (HFSWR), ship detection ability is closely related to the effective suppression of sea clutter. However, traditional sea clutter cancellation methods have problems of either incorrect removal when amplitude of ship-reflected signals is stronger than those of sea clutters, or difficult to distinguish them when the returned signal parameters are similar. To solve those problems, we proposed a boundary-constrained sea-clutter circulation cancellation algorithm for HFSWR. This method utilizes the theory of the sea clutter Doppler frequency shift and characteristics of sea clutter in practical radar detection. Through the strategy of boundary condition, the modeling signals for sea clutter circulation cancellation process were constrained. The proposed method was verified by measured HFSWR data and synchronous AIS (Automatic Identification System). The result shows that it is a more effective sea clutter suppression method and it can overcame the deficiency of the traditional method and increasethe stable signal-to-clutter ratio. |
| Key words: sea clutter HFSWR ship detection circulation cancellation |
