FPGA实时频谱分析与数字荧光显示电路的设计与研究

实时频谱分析仪是最新一代的无线信号测试仪器，它可以无缝测量和显示时域波形和频域幅谱，帮助快捷、轻松地分析故障和确定信号特征。本论文研究并实现了实时频谱分析仪中频谱运算与显示技术，主要包括频谱分析单元和数字荧光处理单元的设计。借助并行器件 FPGA 的高速运算能力，完成对实时 I/Q 数据对的频谱分析与显示的功能。通过FFT和 CORDIC运算单元，运算得到实时的频域幅值结果，并采用独特的数字荧光显示技术生动直观地显示出频域信号的幅度谱变化，实现了瞬时射频频谱的捕捉和显示功能。论文设计的模块已基于 Xilinx FPGA（Virtex-4-SX55）平台实现验证，最终频谱更新率可达每秒数万帧，达到了预定的技术指标。 59680
毕业论文关键词实时频谱分析仪频谱分析数字荧光处理
Title FPGA-based real-time spectrum analysis and digital phosphor display circuit design and research
Abstract Real-time spectrum analyzer is the latest generation of wireless signal test equipment, it can seamlessly measure and display time-domain waveform and frequency-domain amplitude spectrum, to help quickly and easily analyze faults and identify signal characteristics. This thesis is to study and implement spectrum computing and display technologies for real-time spectrum analyzer, including design on digital phosphor spectrum analysis unit and processing unit. With high-speed FPGA devices in parallel computing capabilities, the spectrum analysis and display functions of real-time I / Q data can be achieved. By FFT and CORDIC arithmetic unit, we get real-time results of the frequency-domain amplitude.The unique digital phosphor display technology is applied where the frequency-domain signal amplitude spectrum changes will be displayed vividly and intuitively, to achieve the instantaneous RF spectrum capture and display capabilities. The module designed has been implemented and verified based on Xilinx FPGA (Virtex-4-SX55) platform. The spectrum update rate achieves up to tens of thousands of frames per second, which has reached the predetermined specifications.
Keywords Real-time Spectrum Analyzer, spectrum analysis, digital phosphor processing

1 绪论 1

1.1 实时频谱分析仪的发展背景 1

1.2 论文研究的主要内容 3

1.3 论文结构及内容安排 4

2 总体设计 5

2.1 系统框架 5

2.2 FPGA 芯片介绍 6

2.3 FPGA 资源的利用 8

2.4 本章小结 9

3 频谱分析模块的设计 10

3.1 功能分析 10

3.2 实现算法 10

3.3 模块的设计与实现 14

3.4 模块的测试22

3.5 本章小结25

4 数字荧光处理模块的设计 26

4.1 DPX 原理 26

4.2 总体架构流程27

4.3 位图数据库的设计 28

4.4 DPX 缓冲 FIFO 的设计 31

4.5 位图数据库的更新 32

4.6 配色单元的设计 36

4.7 实现验证 39

4.8 本章小结 41

5 总结与展望 42

致谢 44

参考文献45

1 绪论 1.1 实时频谱分析仪的发展背景 FPGA实时频谱分析与数字荧光显示电路的设计与研究:http://www.751com.cn/tongxin/lunwen_64974.html