| 摘要: |
| 频率捷变相控阵雷达的脉冲回波之间互不相关，且信噪比起伏严重，多次快拍数据不便积累，因此角度估计性能较差。鉴于此，分析研究了频率捷变相控阵雷达多次不相关快拍数据的积累方式，提出了频率捷变相控阵雷达最大似然测角方法。该方法通过对多次快拍的角度信息进行最优加权，将多次快拍数据有效积累起来，避免了频率捷变相控阵雷达因各快拍之间信噪比起伏而带来的性能损失，可明显提高测角精度，计算机仿真证明了该方法的正确性和有效性。 |
| 关键词: 频率捷变 相控阵雷达 角度估计 最大似然 最优融合 |
| DOI：DOI:10.3969/j.issn.1672-2337.2019.04.015 |
| 分类号:TN958.6；TN958.92 |
| 基金项目:中央高校基本科研业务费资助项目（No.K505120204） |
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| Maximum Likelihood Angle Measurement Method for Frequency-Agile Phased Array Radar |
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SHAN Yichen，ZHAO Yongbo
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National Key Lab of Radar Signal Processing，Xidian University，Xi’an 710071，China
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| Abstract: |
| The pulse echoes of frequency-agile phased array radar are noncoherent and the signal-to-noise ratio fluctuates severely，so that it is not easily to accumulate the multiple snapshots cannot，which leads to the poor performance of angle estimation. In view of this problem，this paper analyzes the accumulation methods of multiple noncoherent snapshots of frequency-agile phased array radar，and proposes a maximum likelihood angle measurement method for frequency-agile phased array radar. The proposed method can effectively accumulate multiple snapshots by optimally weighting the angle estimation values of multiple snapshots，which avoids the performance loss of frequency-agile phased array radar caused by the fluctuation of signal-to-noise obviously improves the accuracy of angle measurement can be. Finally，the computer simulation proves the correctness and effectiveness of the proposed method. |
| Key words: frequency agility phased array radar angle estimation maximum likelihood optimal fusion |
