發(fā)布時(shí)間：2018-03-26 15:03

  本文選題：衛(wèi)星導(dǎo)航系統(tǒng)　切入點(diǎn)：干擾監(jiān)測(cè)　出處：《湖南大學(xué)》2014年碩士論文

【摘要】：復(fù)雜電磁環(huán)境一直影響著衛(wèi)星導(dǎo)航系統(tǒng)的穩(wěn)定運(yùn)行，電磁干擾給導(dǎo)航系統(tǒng)的性能帶來(lái)不同程度的影響，抗干擾問(wèn)題已成為衛(wèi)星導(dǎo)航系統(tǒng)建設(shè)中必須考慮的問(wèn)題。干擾監(jiān)測(cè)是各種抗干擾措施實(shí)施的前提，因此，衛(wèi)星導(dǎo)航系統(tǒng)干擾監(jiān)測(cè)技術(shù)的研究具有十分重要的意義。本文對(duì)衛(wèi)星導(dǎo)航系統(tǒng)壓制式干擾監(jiān)測(cè)的關(guān)鍵技術(shù)進(jìn)行了初步的研究，分析了典型壓制式干擾的可觀測(cè)特征，提出了兼顧低虛警率及低漏警率的干擾監(jiān)測(cè)算法和一種大動(dòng)態(tài)范圍自動(dòng)增益控制（Automatic GainControl, AGC）算法，設(shè)計(jì)并實(shí)現(xiàn)了一種北斗衛(wèi)星導(dǎo)航在線干擾監(jiān)測(cè)系統(tǒng)中的實(shí)時(shí)監(jiān)測(cè)分析軟件，，其研究成果已成功應(yīng)用于某重大專(zhuān)項(xiàng)工程項(xiàng)目。 本文的主要研究?jī)?nèi)容包括： （1）針對(duì)衛(wèi)星導(dǎo)航系統(tǒng)中常見(jiàn)的壓制式干擾進(jìn)行了特征分析，分析得到了可用于干擾識(shí)別的特征參數(shù)；針對(duì)脈沖式壓制干擾，提出了一種基于自適應(yīng)脈寬判決門(mén)限的監(jiān)測(cè)算法；針對(duì)連續(xù)波壓制干擾，提出了一種基于雙門(mén)限判決的監(jiān)測(cè)算法；這兩種壓制式干擾監(jiān)測(cè)算法在設(shè)計(jì)上保證了干擾判決時(shí)的虛警和漏警同時(shí)處于較低的水平，二者結(jié)合可以實(shí)現(xiàn)對(duì)壓制式干擾的低虛警和低漏警監(jiān)測(cè)。 （2）針對(duì)復(fù)雜電磁環(huán)境下的大動(dòng)態(tài)范圍干擾信號(hào)監(jiān)測(cè)需求，通過(guò)分析高斯干擾和單頻干擾樣式下傳統(tǒng)AGC的不足，提出了基于限幅比例的大動(dòng)態(tài)AGC算法，該算法能夠適應(yīng)不同的干擾類(lèi)型，完全利用單頻干擾的有效比特?cái)?shù)，使得輸入信號(hào)的量化之后的信噪比損耗最小，保證不同干擾樣式下的接收性能。 （3）以干擾信號(hào)分析以及提出的干擾監(jiān)測(cè)算法為基礎(chǔ)，設(shè)計(jì)并實(shí)現(xiàn)了實(shí)時(shí)監(jiān)測(cè)分析軟件，該軟件包含三種工作模式，分別是可完成對(duì)干擾信號(hào)進(jìn)行實(shí)時(shí)在線監(jiān)測(cè)的在線分析模式、完成事后精確分析的離線分析模式以及完成軟件仿真自校的仿真分析模式；依托北斗衛(wèi)星導(dǎo)航在線干擾監(jiān)測(cè)平臺(tái)的實(shí)測(cè)分析，對(duì)本文提出的壓制式干擾監(jiān)測(cè)算法、自動(dòng)增益控制算法以及設(shè)計(jì)實(shí)現(xiàn)的實(shí)時(shí)監(jiān)測(cè)分析軟件進(jìn)行了有效驗(yàn)證。測(cè)試結(jié)果證明了本文提出的壓制式干擾監(jiān)測(cè)算法和基于限幅比例AGC增益控制算法的有效性和優(yōu)良性能，能夠?yàn)楸倍沸l(wèi)星導(dǎo)航系統(tǒng)干擾監(jiān)測(cè)系統(tǒng)的建設(shè)提供有力支撐，具有一定的實(shí)用價(jià)值和應(yīng)用前景。
[Abstract]:The complex electromagnetic environment has always affected the stable operation of the satellite navigation system, and electromagnetic interference has brought about varying degrees of impact on the performance of the navigation system. Anti-jamming problem has become a problem that must be considered in the construction of satellite navigation system. Interference monitoring is the premise of various anti-jamming measures, so, It is of great significance to study the jamming monitoring technology of satellite navigation system. In this paper, the key technologies of suppression jamming monitoring in satellite navigation system are studied preliminarily, and the observable characteristics of typical suppression jamming are analyzed. An interference monitoring algorithm with low false alarm rate and low leakage alarm rate and an automatic gain Control (AGCL) algorithm with large dynamic range are proposed. A real-time monitoring and analysis software for Beidou satellite navigation online jamming monitoring system is designed and implemented. Its research results have been successfully applied to a major special project. The main contents of this paper are as follows:. 1) the characteristic analysis of the common suppression jamming in the satellite navigation system is carried out, and the characteristic parameters that can be used to identify the interference are obtained, and a monitoring algorithm based on the adaptive pulse width decision threshold is proposed for the pulse suppression jamming. For continuous wave suppression interference, a two-threshold decision based monitoring algorithm is proposed, which is designed to ensure that both false alarm and false alarm are at a lower level. The combination of the two can realize low false alarm and low false alarm monitoring to suppress interference. Aiming at the monitoring requirement of large dynamic range interference signal in complex electromagnetic environment, a large dynamic AGC algorithm based on amplitude limiting ratio is proposed by analyzing the shortcomings of traditional AGC under Gao Si interference and single frequency interference mode. The algorithm can adapt to different interference types and make full use of the effective bit number of single frequency interference to minimize the SNR loss after quantization of the input signal and ensure the reception performance under different interference patterns. Based on the interference signal analysis and the proposed interference monitoring algorithm, a real-time monitoring and analysis software is designed and implemented. The software includes three working modes, one is the on-line analysis mode, which can realize the real-time on-line monitoring of the interference signal, and the other is the real-time on-line monitoring of the interference signal. The off-line analysis mode of accurate analysis after the event and the simulation analysis mode of software simulation self-calibration are completed. Based on the actual measurement and analysis of Beidou satellite navigation online jamming monitoring platform, the suppression jamming monitoring algorithm proposed in this paper is analyzed. The automatic gain control algorithm and the real-time monitoring and analysis software designed and implemented are validated effectively. The test results show the effectiveness and excellent performance of the suppression interference monitoring algorithm and the gain control algorithm based on the amplitude limiting proportional AGC. It can provide strong support for the construction of interference monitoring system of Beidou satellite navigation system, and has certain practical value and application prospect.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN96.1

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