| 混响空时协方差矩阵的两种计算方法比较与分析 |
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| 引用本文： | 吕维,王志杰,李建辰,王明洲,胡桥.混响空时协方差矩阵的两种计算方法比较与分析[J].鱼雷技术,2012(4):251-255. |
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| 作者姓名： | 吕维 王志杰 李建辰 王明洲 胡桥 |
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| 作者单位： | 1. 中国船舶重工集团公司第705研究所,陕西西安,710075
2. 水下信息与控制重点实验室,陕西西安,710075 |
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| 基金项目： | 陕西省科学技术研究发展计划资助项目(2010KJXX-09) |
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| 摘 要： | 协方差矩阵的计算是讨论空时自适应处理（STAP）的基础，本文主要对协方差矩阵的两种计算方法：适合理论研究的导向矢量合成方法和符合工程实际的直接阵列数据域方法进行了比较和分析。讨论了这两种方法的计算原理，以及各自的应用背景；比较了两种方法的计算结果在混响协方差矩阵形式、特征值、功率谱以及改善因子上的不同。仿真结果表明，两种计算方法有明显差异，直接阵列数据域方法为空时自适应处理的应用提供了更准确的理论基础。
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| 关 键 词： | 理论导向矢量合成 直接阵列数据域 混响协方差矩阵 空时自适应处理 |
Comparison and Analysis of Two Calculation Methods of Space Time Covariance Matrix for Reverberation |
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| Lü Wei,WANG Zhi-jie,LI Jian-chen,WANG Ming-zhou,HU Qiao.Comparison and Analysis of Two Calculation Methods of Space Time Covariance Matrix for Reverberation[J].Torpedo Technology,2012(4):251-255. |
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| Authors: | Lü Wei WANG Zhi-jie LI Jian-chen WANG Ming-zhou HU Qiao |
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| Affiliation: | 1,2(1.The 705 Research Institute,China Shipbuilding Industry Corporation,Xi an 710075,China;2.Science and Technology on Underwater Information and Control Laboratory,Xi an 710075,China) |
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| Abstract: | Calculation of covariance matrix is a basis for space time adaptive processing(STAP).Two methods for cal-culating reverberation covariance matrix,the steering vector synthesis method adapting to theoretical analysis and the direct array data domain method adapting to engineering,are discussed in this paper.The principles and applications of the two methods are analyzed,and their calculation differences in the form,eigenvalue,power spectrum and improve-ment factor of reverberation covariance matrix are compared.Simulation results illustrate that the two methods are ob-viously different,and the direct array data domain method lays the more exact theoretical foundation for its application to STAP. |
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| Keywords: | theoretical steering vector synthesis direct array data domain reverberation covariance matrix space time adap-tive processing(STAP) |
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