干擾背景下基于雙圓陣的全向測(cè)角方法

田超; 文樹(shù)梁

doi:10.11999/JEIT141375

干擾背景下基于雙圓陣的全向測(cè)角方法

doi: 10.11999/JEIT141375 cstr: 32379.14.JEIT141375

田超¹,
文樹(shù)梁¹

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出版歷程
- 收稿日期: 2014-10-29
- 修回日期: 2015-02-06
- 刊出日期: 2015-07-19

Omni-directional Angle Measurement Algorithm under Interference with Double Circular Arrays

Tian Chao¹,
Wen Shu-liang¹

摘要

摘要: 當(dāng)干擾與目標(biāo)方位夾角較小時(shí)，基于單圓陣的方位全向米波雷達(dá)在進(jìn)行干擾對(duì)消時(shí)，目標(biāo)回波的對(duì)消損失較大，從而降低了干擾對(duì)消后的目標(biāo)檢測(cè)概率和目標(biāo)方位估計(jì)精度。針對(duì)此問(wèn)題，該文提出一種基于雙圓陣的干擾對(duì)消和目標(biāo)方位角估計(jì)算法。該算法先利用小圓陣激勵(lì)出的-1, 0和1階相位模式初步估計(jì)干擾的方位角，后利用大圓陣激勵(lì)出對(duì)稱高階相位模式獲得精確的干擾方位角并利用其激勵(lì)出的非對(duì)稱高階相位模式進(jìn)行干擾對(duì)消和目標(biāo)方位角的估計(jì)。該算法相對(duì)于單圓陣的干擾對(duì)消和測(cè)角方法可以減小目標(biāo)回波的對(duì)消損失，提高干擾對(duì)消后的信噪比，從而增大目標(biāo)檢測(cè)概率和提高目標(biāo)方位角的估計(jì)精度，仿真結(jié)果證明了該算法的有效性。
- 雷達(dá) /
- 雙圓陣 /
- 干擾對(duì)消 /
- 全向測(cè)角 /
- 角度模糊
Abstract: If the azimuth angle between the interference and the detected target is small, the energy of the received signal reflected by the target may have a great loss when the interference is cancelled for an omni-directional VHF radar with single circular array. To resolve this problem, an improved algorithm based on double circular arrays is proposed. The algorithm firstly utilizes the excited phase mode -1, 0 and 1 of the small array to estimate a rough azimuth angle of the interference, and then acquires an accurate one by symmetrical phase modes of high orders of the large array. Finally, interference cancellation and estimation of targets azimuth angle are fulfilled via unsymmetrical phase modes of the large array. Compared with the algorithm based on single array, the proposed algorithm can reduce the energy loss of the useful signal and increase the estimation precision of targets azimuth angle. Simulation results demonstrate the effectiveness of the proposed algorithm.
- Radar /
- Double circular arrays /
- Interference cancellation /
- Omni-directional angle measurement /
- Angle ambiguity

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