本文關(guān)鍵詞：北斗導(dǎo)航終端天線與抗干擾算法的研究及實(shí)現(xiàn)　出處：《南京理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 北斗導(dǎo)航系統(tǒng) 隔離 小型化 功率倒置算法 空時(shí)二維聯(lián)合處理 多級(jí)維納濾波

【摘要】：全球衛(wèi)星導(dǎo)航系統(tǒng)是極其重要的空間設(shè)施,在軍民等領(lǐng)域應(yīng)用非常廣泛。它具有重大的政治、社會(huì)和軍事意義。北斗導(dǎo)航系統(tǒng)是我國現(xiàn)在正在自主研發(fā)并且獨(dú)立運(yùn)行的導(dǎo)航系統(tǒng)。考慮到北斗導(dǎo)航終端設(shè)備的便攜性,設(shè)計(jì)的天線在滿足性能指標(biāo)的同時(shí)尺寸要盡量小。另外,北斗導(dǎo)航用戶端的接收機(jī)極易受到有意或無意的電磁干擾而導(dǎo)致無法正常工作,因此對接收機(jī)的抗干擾能力提出了要求。本文除了介紹幾款用于北斗導(dǎo)航終端的天線外,研究并實(shí)現(xiàn)了自適應(yīng)濾波抗干擾算法。本論文的主要工作可以概括如下： 第一,根據(jù)指標(biāo)要求,借鑒和總結(jié)前人的研究成果,設(shè)計(jì)了一款應(yīng)用于北斗導(dǎo)航終端的新型結(jié)構(gòu)的低剖面三頻天線,并對天線的隔離性能分析,通過優(yōu)化結(jié)構(gòu)提高天線的隔離。接著,研究天線的小型化技術(shù)并對結(jié)構(gòu)新型的天線進(jìn)一步小型化,同時(shí)設(shè)計(jì)了一款小型化的北斗三頻疊層天線。結(jié)果表明,這幾款三頻天線工作性能良好,具有一定的應(yīng)用價(jià)值。 第二,首先介紹了各種自適應(yīng)準(zhǔn)則和不同平面陣列以及共形陣的導(dǎo)向矢量,然后基于功率倒置算法分別實(shí)現(xiàn)了空域和空時(shí)二維聯(lián)合的抗干擾仿真,空域給出了不同陣列的濾波性能,空時(shí)分析了陣元數(shù)、延遲單元數(shù)以及陣元間距對抗干擾性能的影響,通過Matlab仿真結(jié)果可以看出,空時(shí)二維聯(lián)合抗干擾處理算法相對于純空域?yàn)V波有著更好的抗干擾性能。 第三,基于矩陣求逆需要處理的數(shù)據(jù)量很大,本文重點(diǎn)對多級(jí)維納濾波降秩算法做了詳細(xì)的理論分析與實(shí)現(xiàn),接著對通道失配情況下的抗干擾性能作分析,并驗(yàn)證相關(guān)相減多級(jí)維納濾波算法在DSP中的可行性。結(jié)果表明,該算法能夠很好的在硬件平臺(tái)上實(shí)現(xiàn)。
[Abstract]:The Global Satellite Navigation system (GNSS) is an extremely important space facility and is widely used in military and civilian fields. Beidou navigation system is a navigation system which is being independently developed and operated independently in our country. Considering the portability of Beidou navigation terminal equipment. The designed antenna should be as small as possible while satisfying the performance requirements. In addition, the receiver of Beidou navigation user is vulnerable to intentional or unintentional electromagnetic interference and can not work properly. Therefore, the anti-jamming capability of the receiver is required. In addition to the introduction of several antennas used in Beidou navigation terminal. The adaptive filter anti-jamming algorithm is studied and implemented. The main work of this paper can be summarized as follows: First, according to the requirements of the index, draw lessons from and summarize the previous research results, designed a new type of low profile three-frequency antenna used in Beidou navigation terminal, and analyzed the isolation performance of the antenna. The isolation of antenna is improved by optimizing the structure. Then, the miniaturization technology of antenna is studied and the new antenna is further miniaturized. At the same time, a miniaturized Beidou three-frequency laminated antenna is designed. These three-frequency antennas work well and have certain application value. Secondly, various adaptive criteria, different plane arrays and orientation vectors of conformal arrays are introduced, and then the anti-jamming simulation of space-time and space-time joint interference is implemented based on the power inversion algorithm. The filtering performance of different arrays is given in spatial domain. The effects of array element number, delay cell number and array cell spacing on anti-jamming performance are analyzed in space-time. The results of Matlab simulation show that. Space-time two-dimensional joint anti-jamming algorithm has better anti-jamming performance than pure spatial filtering. Third, based on the large amount of data needed to deal with matrix inversion, this paper focuses on the multi-level Wiener filter rank reduction algorithm to do a detailed theoretical analysis and implementation, and then the channel mismatch in the case of anti-jamming performance analysis. The feasibility of correlation subtractive multistage Wiener filter algorithm in DSP is verified. The results show that the algorithm can be implemented on hardware platform.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN96.1

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