| 基于频谱特征分析的多谐波时间调制阵列测向方法 |
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| 引用本文： | 刘晗,陈靖峰,杨柳,倪刚,贺冲,金荣洪.基于频谱特征分析的多谐波时间调制阵列测向方法[J].电波科学学报,2023,38(1):123-129. |
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| 作者姓名： | 刘晗 陈靖峰 杨柳 倪刚 贺冲 金荣洪 |
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| 作者单位： | 上海交通大学电子工程系, 上海 200240 |
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| 基金项目： | 国家自然科学基金(62001291，61901263)；中国博士后科学基金(2020M671123) |
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| 摘 要： | 针对基于谐波特征分析的时间调制阵列(time-modulated array, TMA)测向技术中信息利用率低的问题，提出了一种基于信号频谱特征分析的多谐波TMA测向方法.通过分析接收信号的频谱特征，构建了基于信号频谱特征多谐波测向模型，推导了基于频谱特征的来波方向最优线性无偏估计(best linear unbiased estimation, BLUE)表达式，从而提高了测向精度及稳定性.以BPSK信号为例，通过仿真实验验证了所提算法的有效性，同时搭建了工作于S频段的二单元TMA测向系统证实了所提方法的可行性.
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| 关 键 词： | 测向 最优线性无偏估计(BLUE) 时间调制阵列(TMA) 谐波 测向精度 |
| 收稿时间： | 2021-10-13 |
Multi-harmonic direction-finding method in time-modulated array based on frequency spectrum property analysis |
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| Affiliation: | Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Aiming to improve the low information utilization of direction-finding methods with the harmonic property analysis under time-modulated array (TMA), a multi-harmonic direction-finding method of TMA based on signal spectrum characteristic is proposed. By analyzing the signal frequency spectrum, the multi-harmonic direction-finding model is established and the best linear unbiased estimated formulation is derived, which can effectively improve the direction-finding accuracy and stability of TMA in the noise environment. The binary phase shift keying (BPSK) signal is provided as a typical communication signal to examine the effectiveness of the proposed method. Meanwhile, an S-band two element TMA is also constructed to verify its feasibility in the experiment. |
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