基于互相關(guān)投影導(dǎo)航接收機(jī)欺騙干擾抑制方法

王純; 張林讓

doi:10.11999/JEIT151139

基于互相關(guān)投影導(dǎo)航接收機(jī)欺騙干擾抑制方法

doi: 10.11999/JEIT151139

王純¹,
張林讓²

1.
(西安建筑科技大學(xué)信息與控制工程學(xué)院西安 710055) ②(西安電子科技大學(xué)電子信息工程學(xué)院西安 710071)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61373112, 61473216)，教育部高等學(xué)校博士學(xué)科點(diǎn)專(zhuān)項(xiàng)科研基金(20126120110008)，陜西省自然科學(xué)基礎(chǔ)研究基金青年人才項(xiàng)目(2013JQ8003)

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出版歷程
- 收稿日期: 2015-10-10
- 修回日期: 2016-05-13
- 刊出日期: 2016-08-19

Spoofing Mitigation Method for Navigation Receiver Based on Cross Correlation and Projection

WANG Chun¹,
ZHANG Linrang²

1.
(College of Information and Control Engineering, Xi&rsquo
2.
(National Laboratory of Radar Signal Processing, Xidian University, Xi&rsquo

Funds:

The National Natural Science Foundation of China (61373112, 61473216), The Specialized Research Fund for the Doctoral Program of Higher Education(20126120110008), The Natural Science Basic Research Plan in Shaanxi Province of China (2013JQ8003)

摘要

摘要: 由于欺騙干擾模擬發(fā)送與導(dǎo)航衛(wèi)星信號(hào)相同的C/A碼，這使得衛(wèi)星導(dǎo)航接收機(jī)極易被其誤導(dǎo)和誘騙，從而給出錯(cuò)誤的定位信息。考慮到導(dǎo)航信號(hào)和同結(jié)構(gòu)欺騙干擾自身都具有強(qiáng)自相關(guān)性，且欺騙干擾功率稍大于真實(shí)信號(hào)，該文提出一種采用陣列天線抑制同結(jié)構(gòu)欺騙干擾的盲干擾抑制方法。該方法從多天線接收數(shù)據(jù)與其自身延遲的參考數(shù)據(jù)做互相關(guān)入手，利用該互相關(guān)矩陣求解干擾的正交投影矩陣，最后將投影后信號(hào)互相關(guān)矩陣的最大特征值對(duì)應(yīng)的特征矢量作為最優(yōu)權(quán)。該方法處理時(shí)無(wú)需已知真實(shí)信號(hào)和干擾方向的來(lái)波方向，也無(wú)需對(duì)衛(wèi)星C/A碼序列進(jìn)行遍歷搜索從而解擴(kuò)。理論分析和實(shí)驗(yàn)結(jié)果表明，該陣列波束能夠有效抑制干擾，陣列輸出SNR較高，干擾抑制后接收機(jī)捕獲性能不受干擾影響。
- 欺騙干擾抑制 /
- 測(cè)距(C/A)碼 /
- 真實(shí)信號(hào) /
- 正交投影矩陣
Abstract: Since spoofing send similar navigation satellites C/A code, this kind of interferences can lead to the receiver misled easily, receiver will provide a wrong location information. Considering both navigation signal and spoofing with same navigation signal structure has high self-coherence characteristic, and the power of spoofing is a little higher than authentic signal, this paper proposes a blind spoofing suppression method based on array antenna. Firstly, a cross-correlation matrix is obtained by cross-correlation processing between receive data from multiple antennas and its own delayed reference data. Secondly, the orthogonal projection matrix of interference can be got by the cross-correlation matrix. Finally, the eigenvector corresponding to the biggest eigenvalue from the projected cross-correlation matrix is taken as the optimal weight. Without having known the direction of authentic signal and interference, this method avoid despreading by searching each satellite C/A code sequence before receive. Experimental results show that the array beam can effectively suppress interference with high SNR and receiver performance has no effect by the spoofing.
- Spoofing mitigation /
- C/A-code /
- Authentic signal /
- Orthogonal Projection Matrix (OPM)

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