【摘要】：現(xiàn)代軟件無線電技術(shù)是將一定頻段的無線電信號接收下來并轉(zhuǎn)換為數(shù)字序列，利用數(shù)字技術(shù)對信號進(jìn)行多樣化處理，從而實現(xiàn)各種各樣的功能。軟件無線電因其強(qiáng)大的功能和靈活的信號處理算法，在各種無線通信領(lǐng)域得到廣泛應(yīng)用，尤其是在智能天線領(lǐng)域和衛(wèi)星導(dǎo)航抗干擾領(lǐng)域，，因此對軟件無線電技術(shù)的研究是很有意義的。 本文根據(jù)實際工程需要，在對軟件無線電理論進(jìn)行深入研究的基礎(chǔ)上，設(shè)計實現(xiàn)一款高速信號處理硬件平臺，調(diào)試成功并實現(xiàn)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(shù)與傳統(tǒng)通信技術(shù)的優(yōu)勢，然后簡單介紹軟件無線電技術(shù)的發(fā)展現(xiàn)狀及其發(fā)展趨勢。 其次，介紹三種軟件無線電的硬件結(jié)構(gòu)，并分析每一種結(jié)構(gòu)實現(xiàn)的難易程度。然后詳細(xì)介紹了軟件無線電相關(guān)理論，如采樣原理，包括低通采樣、帶通采樣和過采樣，數(shù)字下變頻、數(shù)據(jù)抽取與內(nèi)插、數(shù)字濾波器等基本理論，對每一個理論從時域和頻域角度進(jìn)行簡單的數(shù)學(xué)分析。 然后，詳細(xì)敘述該硬件平臺設(shè)計的每一個環(huán)節(jié)，從平臺的整體結(jié)構(gòu)設(shè)計到每一個模塊芯片的選型、各個模塊的硬件設(shè)計、PCB設(shè)計以及后續(xù)的硬件調(diào)試過程。每一個模塊都詳細(xì)介紹了所選擇芯片的性能，硬件設(shè)計中的時鐘問題，電源問題以及接口設(shè)計等。 最后，詳細(xì)介紹了在硬件平臺上實現(xiàn)若干功能的過程和方法，并展示測試結(jié)果，如利用鎖相環(huán)產(chǎn)生需要頻率的時鐘、產(chǎn)生數(shù)字本振、數(shù)字上下變頻、數(shù)據(jù)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(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN92

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本文編號：2254025