干擾子空間正交投影快速零陷跟蹤波束賦形算法

馬曉峰; 陸樂(lè); 盛衛(wèi)星; 韓玉兵; 張仁李

doi:10.11999/JEIT151438

干擾子空間正交投影快速零陷跟蹤波束賦形算法

doi: 10.11999/JEIT151438

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61501240, 11273017)，上海航天基金重點(diǎn)項(xiàng)目(SAST201437)

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- 文章訪問(wèn)數(shù): 1477
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2015-12-17
- 修回日期: 2016-05-16
- 刊出日期: 2016-10-19

Fast Nulls Tracking Pattern Synthesis Based on Jammer Subspace Orthogonal Projection

Funds:

The National Natural Science Foundation of China (61501240, 11273017), The Key Project of Shanghai Aerospace Foundation of China (SAST201437)

摘要

摘要: 該文針對(duì)LEO星載陣列天線抑制角度動(dòng)態(tài)變化的有源干擾的需要，提出一種干擾子空間正交投影的快速零陷跟蹤波束賦形優(yōu)化算法。算法采用干擾子空間動(dòng)態(tài)更新與迭代正交投影，不斷快速修正零陷位置，并通過(guò)迭代傅里葉變換(IFT)技術(shù)進(jìn)行優(yōu)化加速。所提出的快速算法在整個(gè)干擾零陷跟蹤過(guò)程中，具有穩(wěn)健和精確的控制方向圖主瓣賦形區(qū)形狀和陣元電流激勵(lì)系數(shù)動(dòng)態(tài)范圍的能力，同時(shí)具備自適應(yīng)最小化方向圖旁瓣電平的能力，適用于星載系統(tǒng)在線實(shí)時(shí)計(jì)算。仿真實(shí)驗(yàn)驗(yàn)證了算法的快速性、有效性和穩(wěn)健性。
- 低軌道衛(wèi)星通信 /
- 快速波束賦形 /
- 抗干擾零陷 /
- 快速傅里葉變換
Abstract: A fast nulls tracking pattern synthesis algorithm based on jammer subspace orthogonal projection is proposed, which can suppress the dynamic active jamming for LEO spaceborne array antenna. The algorithm corrects the nulls positions of radiation pattern synchronously through dynamically jammer subspace updating and iterative orthogonal projection, while the Iterative Fourier Transform (IFT) technique?is adopted to accelerate the correction. The proposed algorithm can maintain the mainlobe region and control the dynamic range ratio of excitations robustly and precisely, while minimizing the pattern sidelobe adaptively, so it is suitable for online real-time calculation in spaceborne array antenna. Simulation results verify the rapidity, effectiveness, and robustness of the proposed algorithm.
- Low Earth Orbit (LEO) satellite communication /
- Fast pattern synthesis /
- Anti-jamming nulls /
- Fast Fourier Transform (FFT)

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