本文選題：陣列信號處理　切入點：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,地面、海洋和空間的用戶通過導(dǎo)航接收機享受連續(xù)、實時、高精度的定位,以及導(dǎo)航和授時服務(wù)。但導(dǎo)航接收機卻很容易受到干擾而無法正確提供導(dǎo)航信息,這是因為導(dǎo)航信號達到地面之后的功率極低,且空間存在大量的電磁干擾。同時,受制于美國對全球定位系統(tǒng)(GPS)的控制,以及衛(wèi)星導(dǎo)航系統(tǒng)在國防建設(shè)中具有重要的軍事地位,世界各國都加大了對導(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處理的抗干擾算法。本文研究了基于多波束的陣列信號處理技術(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。在不同的準則約束下,對比了多波束形成算法和傳統(tǒng)自適應(yīng)濾波算法的性能,并仿真對比了在不同情況下的廣義旁瓣對消算法的性能。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向上形成零陷的同時在有用信號來向上形成增益波束。其次,本文分析了導(dǎo)航抗干擾系統(tǒng)的總體設(shè)計,并對信號處理板進行了詳細的分析和硬件設(shè)計。同時考慮到波束形成時需要濾波器,又對整個系統(tǒng)中需要的帶通濾波器和Hilbert濾波器進行了仿真分析、性能驗證和硬件實現(xiàn)。接下來對數(shù)字多波束算法的硬件實現(xiàn)進行了詳細的分析說明,考慮到硬件資源消耗、實現(xiàn)難易程度及算法性能,本文選擇了LMS算法來實現(xiàn)數(shù)字多波束算法中自適應(yīng)處理部分。本文通過MATLAB浮點仿真和FPGA定點仿真驗證了算法硬件實現(xiàn)的正確性。最后,利用本文設(shè)計的導(dǎo)航抗干擾系統(tǒng)進行外場實驗,通過實際的抗干擾性能測試和搜星定位效果,進一步驗證了基于多波束的陣列信號處理技術(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)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN967.1;TN972

【參考文獻】

相關(guān)碩士學(xué)位論文 前2條

1 符林強;基于陣列的GPS抗干擾算法及性能評估[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現(xiàn)[D];西安電子科技大學(xué);2011年

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本文編號：1606524