【摘要】：干擾抑制一直是導(dǎo)航接收機(jī)尤為重要的環(huán)節(jié),已經(jīng)有了較長(zhǎng)時(shí)間的研究歷史,有一些比較經(jīng)典的方法,比如頻域、空域、空時(shí)域抗干擾的處理方法,這些抗干擾技術(shù)都是以標(biāo)量傳感器為接收陣元實(shí)現(xiàn)的。而電磁波的完備信息需要由電場(chǎng)和磁場(chǎng)來(lái)共同描述,電磁矢量傳感器能夠完成電磁波完備信息的接收,它能夠獲取電磁波極化域信息,由二分量電磁矢量傳感器構(gòu)成的極化敏感陣列,使信號(hào)處理過(guò)程能夠利用極化域信息進(jìn)行抗干擾處理,提高了抗干擾性能。本文針對(duì)基于電磁矢量傳感器的導(dǎo)航抗干擾算法主要做了以下幾個(gè)方面的研究:1.對(duì)基于單電磁矢量傳感器的抗干擾算法進(jìn)行了性能分析,并與環(huán)狀拉伸式單電磁矢量傳感器的抗干擾性能進(jìn)行對(duì)比。環(huán)狀拉伸式單電磁矢量傳感器是為了減小極子間的耦合效應(yīng)而研究的特殊陣型,它保證了六分量的完備性,同時(shí)又符合導(dǎo)航接收機(jī)中對(duì)接收天線尺寸的限制,空間上的分離使天線孔徑增加,因此抗干擾性能也提高了。2.在極化敏感陣列基礎(chǔ)上,論文開(kāi)展了極化空域的抗干擾算法研究與性能分析。相對(duì)于空域抗干擾,極化空域抗干擾在干擾與信號(hào)的空間位置接近時(shí)仍能保持很好的抗干擾性能,擴(kuò)展了陣列抗干擾的應(yīng)用場(chǎng)景。3.基于極化敏感陣列的空時(shí)極化聯(lián)合抗干擾,充分利用了信號(hào)的時(shí)域、空域、極化域信息,屬于空時(shí)抗干擾與極化空域抗干擾的延伸,實(shí)現(xiàn)了多維域抗干擾,在極化空域抗干擾基礎(chǔ)上有了進(jìn)一步性能提升。為了詳盡的描述每個(gè)電磁矢量傳感器的二分量之間的正交關(guān)系,本論文用四元數(shù)來(lái)構(gòu)建每個(gè)陣元接收到的信號(hào)模型,實(shí)現(xiàn)四元數(shù)域內(nèi)空時(shí)極化聯(lián)合抗干擾算法,與復(fù)數(shù)域內(nèi)的空時(shí)聯(lián)合極化抗干擾算法相比,該方法保證抗干擾性能的同時(shí),降低了空時(shí)極化聯(lián)合抗干擾的運(yùn)算量。
[Abstract]:Interference suppression has been a very important part of the navigation receiver. It has been studied for a long time. There are some classical methods, such as frequency domain, space-time domain anti-jamming method. These anti-jamming techniques are realized by using scalar sensor as the receiving array element. The complete information of electromagnetic wave needs to be described by electric field and magnetic field. The electromagnetic vector sensor can receive the complete information of electromagnetic wave, and it can obtain the information of polarization domain of electromagnetic wave. The polarization sensitive array composed of two-component electromagnetic vector sensor makes the signal processing process use polarization domain information for anti-interference processing and improves the anti-jamming performance. In this paper, the navigation anti-jamming algorithm based on electromagnetic vector sensor is studied in the following aspects: 1. The performance of anti-jamming algorithm based on single electromagnetic vector sensor is analyzed and compared with that of circular stretch single electromagnetic vector sensor. The circular stretch single electromagnetic vector sensor is a special array which is studied to reduce the coupling effect between the poles. It ensures the completeness of the six components and meets the limits of the size of the receiving antenna in the navigation receiver at the same time. The separation in space increases the aperture of the antenna, so the anti-jamming performance is improved by. 2. 2. On the basis of polarization-sensitive array, the anti-jamming algorithm and performance analysis in polarimetric spatial domain are carried out in this paper. Compared with spatial anti-jamming, polarimetric spatial anti-jamming can maintain good anti-jamming performance when the interference is close to the spatial position of the signal, which extends the application scenario of array anti-jamming. Space-time polarization combined anti-jamming based on polarization-sensitive array makes full use of signal information in time domain, spatial domain and polarization domain. It belongs to the extension of space-time anti-jamming and polarization space-domain anti-jamming, and realizes multi-dimensional anti-jamming. On the basis of polarimetric spatial anti-jamming, the performance is further improved. In order to describe the orthogonal relation between the two components of each electromagnetic vector sensor in detail, this paper uses quaternion to construct the signal model received by each array element, and realizes the combined anti-jamming algorithm of space-time polarization in quaternion domain. Compared with the space-time joint polarization anti-jamming algorithm in complex domain, this method guarantees the anti-jamming performance and reduces the computation cost of the space-time polarization joint anti-jamming algorithm.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN965.5;TN973

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 劉勇;徐振海;肖順平;;陣列互耦對(duì)極化敏感陣列濾波性能的影響[J];電子學(xué)報(bào);2006年12期

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本文編號(hào)：2200707