發(fā)布時間：2018-10-05 16:10

【摘要】：現代軟件無線電技術是將一定頻段的無線電信號接收下來并轉換為數字序列，利用數字技術對信號進行多樣化處理，從而實現各種各樣的功能。軟件無線電因其強大的功能和靈活的信號處理算法，在各種無線通信領域得到廣泛應用，尤其是在智能天線領域和衛(wèi)星導航抗干擾領域，，因此對軟件無線電技術的研究是很有意義的。 本文根據實際工程需要，在對軟件無線電理論進行深入研究的基礎上，設計實現一款高速信號處理硬件平臺，調試成功并實現部分功能。具體工作如下： 首先，介紹軟件無線電的發(fā)展歷史，分析軟件無線電技術與傳統(tǒng)通信技術的優(yōu)勢，然后簡單介紹軟件無線電技術的發(fā)展現狀及其發(fā)展趨勢。 其次，介紹三種軟件無線電的硬件結構，并分析每一種結構實現的難易程度。然后詳細介紹了軟件無線電相關理論，如采樣原理，包括低通采樣、帶通采樣和過采樣，數字下變頻、數據抽取與內插、數字濾波器等基本理論，對每一個理論從時域和頻域角度進行簡單的數學分析。 然后，詳細敘述該硬件平臺設計的每一個環(huán)節(jié)，從平臺的整體結構設計到每一個模塊芯片的選型、各個模塊的硬件設計、PCB設計以及后續(xù)的硬件調試過程。每一個模塊都詳細介紹了所選擇芯片的性能，硬件設計中的時鐘問題，電源問題以及接口設計等。 最后，詳細介紹了在硬件平臺上實現若干功能的過程和方法，并展示測試結果，如利用鎖相環(huán)產生需要頻率的時鐘、產生數字本振、數字上下變頻、數據采集等，平臺的性能也比較滿意。
[Abstract]:Modern software radio technology is to receive radio signals in a certain frequency range and convert them into digital sequences, and use digital technology to process signals in a variety of ways, thus realizing a variety of functions. Because of its powerful function and flexible signal processing algorithm, software radio has been widely used in various fields of wireless communication, especially in the field of smart antenna and satellite navigation anti-jamming. Therefore, the study of software radio technology is of great significance. Based on the research of software radio theory, a high-speed signal processing hardware platform is designed and implemented in this paper. The hardware platform is debugged successfully and some functions are realized. The main work is as follows: firstly, the development history of software radio is introduced, the advantages of software radio and traditional communication technology are analyzed, and then the present situation and development trend of software radio technology are briefly introduced. Secondly, the hardware structure of three kinds of software radio is introduced, and the degree of difficulty of each structure is analyzed. Then it introduces the relevant theories of software radio in detail, such as sampling principle, including low-pass sampling, bandpass sampling and over-sampling, digital downconversion, data decimation and interpolation, digital filter and so on. A simple mathematical analysis of each theory in time domain and frequency domain is carried out. Then, each link of the hardware platform design is described in detail, from the overall structure design of the platform to the selection of each module chip, the hardware design of each module and the PCB design of each module and the subsequent hardware debugging process. Each module describes in detail the performance of the selected chip, clock problems in hardware design, power supply and interface design. Finally, the process and method of realizing some functions on the hardware platform are introduced in detail, and the test results are displayed, such as the use of phase-locked loop to generate clock with frequency, digital local oscillator, digital up-down conversion, data acquisition, etc. The performance of the platform is also satisfactory.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN92

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本文編號：2254025