基于多級阻塞的穩(wěn)健相干自適應(yīng)波束形成

唐敏; 齊棟; 劉成城; 趙擁軍

doi:10.11999/JEIT180332

基于多級阻塞的穩(wěn)健相干自適應(yīng)波束形成

doi: 10.11999/JEIT180332

解放軍戰(zhàn)略支援部隊信息工程大學(xué)數(shù)據(jù)與目標工程學(xué)院 ??鄭州 ??450001

基金項目: 國家自然科學(xué)基金(61703433)

詳細信息

作者簡介:
唐敏：女，1994年生，博士生，研究方向為陣列信號處理和波束形成技術(shù)

齊棟：男，1993年生，碩士生，研究方向為陣列信號處理和DOA估計

劉成城：男，1986 年生，講師，研究方向為數(shù)字波束形成技術(shù)

趙擁軍：男，1964年生，教授，博士生導(dǎo)師，研究方向為雷達信號處理、陣列信號處理

通訊作者:
唐敏　tangminmvp@126.com

中圖分類號: TN911.7
計量
- 文章訪問數(shù): 1805
- HTML全文瀏覽量: 765
- PDF下載量: 71
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2018-04-11
- 修回日期: 2019-05-16
- 網(wǎng)絡(luò)出版日期: 2019-05-25
- 刊出日期: 2019-07-01

New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking

School of Data and Target Engineering, PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China

Funds: The National Natural Science Foundation of China (61703433)

摘要

摘要: 針對期望信號波達角(DOA)估計誤差較大時相干波束形成性能下降的問題，該文提出一種基于多級阻塞的穩(wěn)健相干自適應(yīng)波束形成算法。該算法首先定義阻塞矩陣，推導(dǎo)多級阻塞原理，并利用其濾除陣列接收信號中的期望信號；然后給出空間中只存在期望信號時，子陣與全陣間陣列流型的映射關(guān)系，據(jù)此推導(dǎo)全陣擴展變換，并證明其在干擾信號存在條件下的有效性；最終利用擴展變換獲取全陣最優(yōu)權(quán)矢量，實現(xiàn)相干波束形成。該算法對期望信號波達角估計誤差穩(wěn)健，且無需干擾信號來向的先驗信息，同時可以有效避免陣列孔徑的損失。仿真分析驗證了算法的優(yōu)越性和理論分析的有效性。
- 信號處理 /
- 穩(wěn)健波束 /
- 相干干擾 /
- 波達角估計誤差 /
- 多級阻塞
Abstract: Since the performance of adaptive beamforming algorithm for coherent signals degrades when the estimation error in the Direction Of Arrival (DOA) of the desired signal is large, a new multistage blocking based beamforming algorithm for coherent interference suppression is proposed. Firstly, the blocking matrix is constructed and the principle of multistage blocking is derived, with which the received signal is processed to remove the desired signal component. Then the mapping between the array manifold of sub-aperture array and the full-aperture array is analyzed when only the desired signal exists in the space. On this basis, the extension transformation is derived with its effectiveness proved in the presence of interference signals. At last, the optimal weight vector of the adaptive beamformer for coherent interference is obtained by extension transformation. Requiring no prior information of the DOA of the interference signals, the new method is robust to the DOA estimation error, and can avoid the loss of array aperture. The effectiveness and superiority of the new algorithm are verified by simulation analysis.
- Signal processing /
- Robust beamforming /
- Coherent interference /
- Direction Of Arrival (DOA) estimation error /
- Multistage blocking

HTML全文

圖 1 Duvall陣列結(jié)構(gòu)示意圖

下載: 全尺寸圖片幻燈片

圖 2 不同$k$值下輸出SINR隨DOA估計誤差的變化曲線

下載: 全尺寸圖片幻燈片

圖 3 波束形成圖

下載: 全尺寸圖片幻燈片

圖 4 輸出SINR的關(guān)系曲線

下載: 全尺寸圖片幻燈片

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