本文選題：陣列信號(hào)處理　切入點(diǎn)：多波束　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：全球衛(wèi)星導(dǎo)航系統(tǒng)利用導(dǎo)航衛(wèi)星發(fā)射導(dǎo)航衛(wèi)星信號(hào),地面、海洋和空間的用戶通過(guò)導(dǎo)航接收機(jī)享受連續(xù)、實(shí)時(shí)、高精度的定位,以及導(dǎo)航和授時(shí)服務(wù)。但導(dǎo)航接收機(jī)卻很容易受到干擾而無(wú)法正確提供導(dǎo)航信息,這是因?yàn)閷?dǎo)航信號(hào)達(dá)到地面之后的功率極低,且空間存在大量的電磁干擾。同時(shí),受制于美國(guó)對(duì)全球定位系統(tǒng)(GPS)的控制,以及衛(wèi)星導(dǎo)航系統(tǒng)在國(guó)防建設(shè)中具有重要的軍事地位,世界各國(guó)都加大了對(duì)導(dǎo)航抗干擾技術(shù)的研究。目前,導(dǎo)航抗干擾系統(tǒng)中應(yīng)用比較廣泛的是基于陣列信號(hào)處理的抗干擾算法。本文研究了基于多波束的陣列信號(hào)處理技術(shù)在導(dǎo)航抗干擾系統(tǒng)中的應(yīng)用。首先,本文在陣列信號(hào)處理技術(shù)基礎(chǔ)上研究了多波束形成抗干擾算法。在不同的準(zhǔn)則約束下,對(duì)比了多波束形成算法和傳統(tǒng)自適應(yīng)濾波算法的性能,并仿真對(duì)比了在不同情況下的廣義旁瓣對(duì)消算法的性能。從仿真中能夠看出多波束形成算法較傳統(tǒng)自適應(yīng)濾波算法能夠在干擾來(lái)向上形成零陷的同時(shí)在有用信號(hào)來(lái)向上形成增益波束。其次,本文分析了導(dǎo)航抗干擾系統(tǒng)的總體設(shè)計(jì),并對(duì)信號(hào)處理板進(jìn)行了詳細(xì)的分析和硬件設(shè)計(jì)。同時(shí)考慮到波束形成時(shí)需要濾波器,又對(duì)整個(gè)系統(tǒng)中需要的帶通濾波器和Hilbert濾波器進(jìn)行了仿真分析、性能驗(yàn)證和硬件實(shí)現(xiàn)。接下來(lái)對(duì)數(shù)字多波束算法的硬件實(shí)現(xiàn)進(jìn)行了詳細(xì)的分析說(shuō)明,考慮到硬件資源消耗、實(shí)現(xiàn)難易程度及算法性能,本文選擇了LMS算法來(lái)實(shí)現(xiàn)數(shù)字多波束算法中自適應(yīng)處理部分。本文通過(guò)MATLAB浮點(diǎn)仿真和FPGA定點(diǎn)仿真驗(yàn)證了算法硬件實(shí)現(xiàn)的正確性。最后,利用本文設(shè)計(jì)的導(dǎo)航抗干擾系統(tǒng)進(jìn)行外場(chǎng)實(shí)驗(yàn),通過(guò)實(shí)際的抗干擾性能測(cè)試和搜星定位效果,進(jìn)一步驗(yàn)證了基于多波束的陣列信號(hào)處理技術(shù)在導(dǎo)航抗干擾系統(tǒng)中的抗干擾能力。
[Abstract]:Global satellite navigation systems use navigation satellites to launch navigation satellite signals, and users of land, ocean and space enjoy continuous, real-time, high-precision positioning through navigation receivers. And navigation and time service. But the navigation receiver is very vulnerable to interference and can not correctly provide navigation information, because the navigation signal after reaching the ground is very low power, and there is a lot of electromagnetic interference in space. At the same time, Subject to the control of GPS by the United States and the important military status of satellite navigation system in national defense construction, countries all over the world have increased their research on navigation anti-jamming technology. The anti-jamming algorithm based on array signal processing is widely used in navigation anti-jamming system. This paper studies the application of array signal processing technology based on multi-beam in navigation anti-jamming system. In this paper, based on array signal processing technology, the anti-jamming algorithm of multi-beam forming is studied, and the performance of multi-beam forming algorithm and traditional adaptive filtering algorithm are compared under different criterion constraints. The performance of the generalized sidelobe cancellation algorithm under different conditions is compared by simulation. It can be seen from the simulation that the multi-beam forming algorithm is more effective than the traditional adaptive filtering algorithm in generating zero trapping when the interference is up and the useful signal can be obtained at the same time. To form a gain beam up. Second, In this paper, the overall design of the navigation anti-jamming system is analyzed, and the signal processing board is analyzed in detail and the hardware is designed. The simulation analysis, performance verification and hardware implementation of the bandpass filter and Hilbert filter are also carried out in the whole system. Then, the hardware implementation of the digital multi-beam algorithm is analyzed in detail, considering the consumption of hardware resources. In this paper, the LMS algorithm is chosen to implement the adaptive processing part of the digital multi-beam algorithm. The correctness of the algorithm is verified by MATLAB floating-point simulation and FPGA fixed-point simulation. Using the navigation anti-jamming system designed in this paper, the anti-jamming ability of array signal processing technology based on multi-beam in navigation anti-jamming system is further verified by the actual anti-jamming performance test and the effect of searching satellite location.
【學(xué)位授予單位】：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)】：TN967.1;TN972

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 符林強(qiáng);基于陣列的GPS抗干擾算法及性能評(píng)估[D];電子科技大學(xué);2011年

2 王青;基于FPGA的發(fā)射數(shù)字多波束形成算法研究及工程實(shí)現(xiàn)[D];西安電子科技大學(xué);2011年

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本文編號(hào)：1606524