基于软件无线电的高速信号处理平台设计与实现

发布时间：2018-10-05 16:10

【摘要】：现代软件无线电技术是将一定频段的无线电信号接收下来并转换为数字序列，利用数字技术对信号进行多样化处理，从而实现各种各样的功能。软件无线电因其强大的功能和灵活的信号处理算法，在各种无线通信领域得到广泛应用，尤其是在智能天线领域和卫星导航抗干扰领域，，因此对软件无线电技术的研究是很有意义的。本文根据实际工程需要，在对软件无线电理论进行深入研究的基础上，设计实现一款高速信号处理硬件平台，调试成功并实现部分功能。具体工作如下：首先，介绍软件无线电的发展历史，分析软件无线电技术与传统通信技术的优势，然后简单介绍软件无线电技术的发展现状及其发展趋势。其次，介绍三种软件无线电的硬件结构，并分析每一种结构实现的难易程度。然后详细介绍了软件无线电相关理论，如采样原理，包括低通采样、带通采样和过采样，数字下变频、数据抽取与内插、数字滤波器等基本理论，对每一个理论从时域和频域角度进行简单的数学分析。然后，详细叙述该硬件平台设计的每一个环节，从平台的整体结构设计到每一个模块芯片的选型、各个模块的硬件设计、PCB设计以及后续的硬件调试过程。每一个模块都详细介绍了所选择芯片的性能，硬件设计中的时钟问题，电源问题以及接口设计等。最后，详细介绍了在硬件平台上实现若干功能的过程和方法，并展示测试结果，如利用锁相环产生需要频率的时钟、产生数字本振、数字上下变频、数据采集等，平台的性能也比较满意。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92

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