發(fā)布時間：2018-07-05 18:06

  本文選題：陣列天線 + 壓縮感知��； 參考：《浙江大學》2017年碩士論文

【摘要】：對于無線定位技術的研究與應用,一直是微波領域的熱點。陣列天線因其靈活的陣列布局,多變的波束結構,優(yōu)異的抗干擾能力,在無線定位領域得到了廣泛的使用�，F(xiàn)有的陣列天線定位系統(tǒng)一般都是基于數(shù)字陣列天線架構設計的,利用高速ADC對信號進行采樣,然后通過對海量數(shù)據(jù)的處理獲得定位數(shù)據(jù)。本論文提出了一種基于陣列天線的壓縮感知定位方法,該方法有別于其他陣列天線定位系統(tǒng),在于其不再關注陣列天線具體的波束結構,而是在單一頻點上,結合壓縮感知技術,利用陣列天線產(chǎn)生的隨機輻射場來實現(xiàn)無線定位。壓縮感知對比傳統(tǒng)的奈奎斯特采樣定律,該技術僅僅依靠稀疏采樣就能重構目標的原始位置,可以在減少定位系統(tǒng)數(shù)據(jù)采集量的同時提高定位精度。本文從壓縮感知定位模型出發(fā),分析了陣列天線無線定位與壓縮感知的關系,將壓縮感知技術運用到陣列天線無線定位中。最終利用仿真軟件建立定位模型,仿真結果驗證了該無線定位方法可以在2 GHz頻率點處對目標實現(xiàn)有效的定位。另外從陣列天線無線定位系統(tǒng)的需求出發(fā),本文在前人基礎上進一步提出一種復數(shù)域概念的陣列天線系統(tǒng)架構,該架構克服了現(xiàn)在主流數(shù)字域陣列天線對高速數(shù)字器件的依賴,較傳統(tǒng)的模擬陣列天線架構又有著更為高效的性能,該架構可以快速精確的控制天線單元幅度與相位,便于陣列天線隨機輻射場的產(chǎn)生。文章詳細闡述了復數(shù)域陣列天線系統(tǒng)架構各個模塊的設計、制作以及調試過程。最后本論文利用上述基于陣列天線的壓縮感知定位方法和復數(shù)域硬件架構,在暗室環(huán)境中,搭建實驗平臺進行定位測試,實驗結果表明上述定位方法和硬件架構在單一頻率點可以對觀測區(qū)域內的目標實現(xiàn)有效定位。
[Abstract]:The research and application of wireless positioning technology has been a hot spot in microwave field. Array antenna is widely used in wireless location field because of its flexible array layout, variable beam structure and excellent anti-jamming ability. The existing array antenna positioning system is generally designed based on the digital array antenna architecture. The high-speed ADC is used to sample the signal, and then the location data is obtained by processing the massive data. In this paper, a compression sensing localization method based on array antenna is proposed. This method is different from other array antenna positioning systems, because it no longer pays attention to the specific beam structure of array antenna, but at a single frequency point. Combined with compressed sensing technology, the random radiation field generated by array antenna is used to realize wireless location. Compared with the traditional Nyquist sampling law, compressed sensing can reconstruct the original position of the target only by sparse sampling, which can reduce the data acquisition of the positioning system and improve the positioning accuracy. Based on the compression sensing model, the relationship between antenna array wireless location and compression sensing is analyzed in this paper, and the compression sensing technology is applied to array antenna wireless location. Finally, the simulation software is used to establish the localization model. The simulation results show that the wireless location method can effectively locate the target at 2GHz frequency. In addition, based on the requirements of array antenna wireless positioning system, this paper proposes a complex domain concept of array antenna system architecture, which overcomes the dependence of current mainstream digital antenna array antenna on high-speed digital devices. Compared with the traditional analogue array antenna architecture, this architecture can quickly and accurately control the amplitude and phase of the antenna elements, and facilitate the generation of the random radiation field of the array antenna. In this paper, the design, fabrication and debugging of each module of complex array antenna system are described in detail. Finally, the thesis uses the compressed sensing localization method based on array antenna and the complex domain hardware architecture, and builds the experimental platform to test the location in the darkroom environment. The experimental results show that the localization method and hardware architecture can effectively locate the target in the observation area at a single frequency point.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN820.15
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本文編號：2101212