GNSS接收機抗干擾性能評估方法研究
發(fā)布時間：2018-11-08 07:15
【摘要】：全球?qū)Ш叫l(wèi)星系統(tǒng)(Global Navigation Satellite System,GNSS)已經(jīng)廣泛應(yīng)用于農(nóng)業(yè)、工業(yè)、交通運輸業(yè)以及科學(xué)研究等當(dāng)今社會的各個領(lǐng)域。隨著未來軍事戰(zhàn)爭中對高精度、高效能、快速反應(yīng)、靈活制導(dǎo)的需要,衛(wèi)星導(dǎo)航技術(shù)將越來越廣泛地應(yīng)用于現(xiàn)代軍事斗爭中,發(fā)揮其不可替代的作用。然而,衛(wèi)星導(dǎo)航系統(tǒng)也存在著一些缺陷,其對抗外界干擾的能力較差。如何進一步提高GNSS接收機的抗干擾性能并提出更加有效的評估方法是衛(wèi)星導(dǎo)航研究領(lǐng)域的一個重要方向。本文以目前廣泛應(yīng)用的陣列天線接收機應(yīng)用為基礎(chǔ),探討對接收機進行抗干擾性能評估的方法。論文的主要工作如下:(1)建立了GNSS接收機空域和空時處理模型,以目前廣泛使用的抗干擾性能評估指標(biāo)——輸出端信干噪比(陣列增益)為手段,研究了不同陣元、不同延遲單元、不同信號和干擾來向?qū)μ炀�陣抗干擾處理的性能影響。(2)分析了以陣列輸出端陣列增益為指標(biāo)進行抗干擾性能評估存在的不足,提出了以解擴后陣列增益作為接收機抗干擾性能的評估指標(biāo),給出了具體的計算方法。該方法避免了在抗干擾輸出端進行解擴處理,能夠獲得更加精確的接收機抗干擾性能評估結(jié)果,仿真結(jié)果證明其有效性。(3)分析了復(fù)雜環(huán)境下接收機采用統(tǒng)計性能指標(biāo)評估其抗干擾性能的原因,通過引入第三章提出的等效陣列增益指標(biāo)提高了傳統(tǒng)的基于統(tǒng)計性能指標(biāo)的評估精度。針對GPS衛(wèi)星星座特性分析了真實的入射角模型和傳統(tǒng)的入射角均勻假設(shè)的不同,并根據(jù)接收機在定位和跟蹤中必須要滿足的一些條件擴展了接收機抗干擾性能評估指標(biāo)。(4)借鑒傳統(tǒng)的抗干擾評估系統(tǒng),構(gòu)建了衛(wèi)星導(dǎo)航接收機抗干擾性能的評估模型。建立了接收機抗干擾評估指標(biāo)體系,針對GNSS接收機抗干擾評估指標(biāo)的相對性、模糊性,引入了一種基于模糊綜合層次法的GNSS接收機抗干擾性能評估方法。評估結(jié)果證明了這種方法的有效性。
[Abstract]:Global Navigation Satellite system (Global Navigation Satellite System,GNSS) has been widely used in agriculture, industry, transportation and scientific research. With the need of high precision, high efficiency, rapid response and flexible guidance in the future military war, satellite navigation technology will be more and more widely used in modern military struggle and play an irreplaceable role. However, satellite navigation system also has some defects, its ability to resist external interference is poor. How to further improve the anti-jamming performance of GNSS receiver and propose a more effective evaluation method is an important direction in the field of satellite navigation research. Based on the widely used array antenna receiver, this paper discusses the method of evaluating the anti-jamming performance of the receiver. The main work of this paper is as follows: (1) the spatial and space-time processing models of GNSS receiver are established. Different array elements are studied by using the widely used anti-jamming performance index, the output signal-to-noise ratio (array gain). Different delay cells, different signals and different interference affect the performance of antenna array anti-jamming processing. (2) the shortcomings of array gain evaluation based on array output are analyzed. The array gain after despreading is proposed as the evaluation index of the receiver's anti-jamming performance, and the concrete calculation method is given. The method avoids despreading at the anti-jamming output, and can obtain more accurate evaluation results of the anti-jamming performance of the receiver. The simulation results show that it is effective. (3) the reason why the receiver uses statistical performance index to evaluate its anti-jamming performance in complex environment is analyzed. By introducing the equivalent array gain index proposed in chapter 3, the traditional evaluation accuracy based on statistical performance index is improved. According to the characteristics of GPS satellite constellation, the difference between the real incident angle model and the traditional assumption of uniform incidence angle is analyzed. The anti-jamming performance evaluation index of the receiver is extended according to some conditions which must be satisfied in the positioning and tracking of the receiver. (4) the evaluation model of the anti-jamming performance of the satellite navigation receiver is built based on the traditional anti-jamming evaluation system. A receiver anti-jamming evaluation index system is established. In view of the relativity and fuzziness of the anti-jamming evaluation index of GNSS receiver, a method for evaluating the anti-jamming performance of GNSS receiver based on fuzzy comprehensive hierarchy method is introduced. The evaluation results show the effectiveness of this method.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN965.5
本文編號：2317764
[Abstract]:Global Navigation Satellite system (Global Navigation Satellite System,GNSS) has been widely used in agriculture, industry, transportation and scientific research. With the need of high precision, high efficiency, rapid response and flexible guidance in the future military war, satellite navigation technology will be more and more widely used in modern military struggle and play an irreplaceable role. However, satellite navigation system also has some defects, its ability to resist external interference is poor. How to further improve the anti-jamming performance of GNSS receiver and propose a more effective evaluation method is an important direction in the field of satellite navigation research. Based on the widely used array antenna receiver, this paper discusses the method of evaluating the anti-jamming performance of the receiver. The main work of this paper is as follows: (1) the spatial and space-time processing models of GNSS receiver are established. Different array elements are studied by using the widely used anti-jamming performance index, the output signal-to-noise ratio (array gain). Different delay cells, different signals and different interference affect the performance of antenna array anti-jamming processing. (2) the shortcomings of array gain evaluation based on array output are analyzed. The array gain after despreading is proposed as the evaluation index of the receiver's anti-jamming performance, and the concrete calculation method is given. The method avoids despreading at the anti-jamming output, and can obtain more accurate evaluation results of the anti-jamming performance of the receiver. The simulation results show that it is effective. (3) the reason why the receiver uses statistical performance index to evaluate its anti-jamming performance in complex environment is analyzed. By introducing the equivalent array gain index proposed in chapter 3, the traditional evaluation accuracy based on statistical performance index is improved. According to the characteristics of GPS satellite constellation, the difference between the real incident angle model and the traditional assumption of uniform incidence angle is analyzed. The anti-jamming performance evaluation index of the receiver is extended according to some conditions which must be satisfied in the positioning and tracking of the receiver. (4) the evaluation model of the anti-jamming performance of the satellite navigation receiver is built based on the traditional anti-jamming evaluation system. A receiver anti-jamming evaluation index system is established. In view of the relativity and fuzziness of the anti-jamming evaluation index of GNSS receiver, a method for evaluating the anti-jamming performance of GNSS receiver based on fuzzy comprehensive hierarchy method is introduced. The evaluation results show the effectiveness of this method.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN965.5
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2 馬云潛,張學(xué)工;支持向量機函數(shù)擬合在分形插值中的應(yīng)用[J];清華大學(xué)學(xué)報(自然科學(xué)版);2000年03期
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