| 引用本文: | 徐振海,王雪松,肖顺平,等.极化域—空域联合谱估计.[J].国防科技大学学报,2004,26(3):63-67.[点击复制] |
| XU Zhenhai,WANG Xuesong,XIAO Shunping,et al.Joint Spectrum Estimation of Polarizational and Spatial Domains[J].Journal of National University of Defense Technology,2004,26(3):63-67[点击复制] |
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| 极化域—空域联合谱估计 |
| 徐振海, 王雪松, 肖顺平, 庄钊文 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 首次提出极化域—空域联合谱的概念，拓广了电磁波特征参量的谱描述方法。结合具体的极化敏感阵列定义了极化域—空域联合谱，用MUSIC方法得到联合谱函数表达式。研究了联合谱的估计的重要性能指标：估计精度和分辨力，估计精度用克拉美劳限CRB(Cramer-Rao Bound)来具体度量，分辨力由极化域—空域模糊函数以及模糊图来描述。最后仿真结果验证了该方法的有效性和理论分析的正确性。 |
| 关键词: 极化敏感阵列 联合谱 多重信号分类 估计精度 克拉美劳限 分辨力 模糊函数 |
| DOI： |
| 投稿日期：2003-12-01 |
| 基金项目:全国优秀博士学位论文专项资金资助项目(08100101)；湖南省自然科学基金资助项目(No.02JJY2100)；国防科技大学优秀博士生创新资助项目 |
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| Joint Spectrum Estimation of Polarizational and Spatial Domains |
| XU Zhenhai, WANG Xuesong, XIAO Shunping, ZHUANG Zhaowen |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The notion of joint spectrum in polarizational and spatial domains is proposed for the first time, which can depict the EM signal completely. Based on the polarization sensitive array, the joint spectrum is defined and its analytic function is presented by using MUSIC method. The estimation accuracy and resolving power are investigated to measure the performance of joint spectrum. The Cramer-Rao Bound (CRB) is used to evaluate the accuracy of the estimated direction of the arrival and polarization angle. The ambiguity function and ambiguity area are used to evaluate the resolving power in polarizational and spatial domains. The simulations verify the superiority of the joint spectrum and coincide with the theoretical analysis. |
| Keywords: polarization sensitive array joint spectrum MUSIC accuracy CRB resolving power ambiguity function |
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