基于FPGA的相干激光测风雷达实时信号处理技术研究
文献类型：学位论文
| 作者 | 张勇成 |
| 学位类别 | 硕士 |
| 答辩日期 | 2011 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 陈卫标 |
| 关键词 | 激光雷达 相干测风 现场可编程门阵列 实时信号处理 |
| 其他题名 | Research of Real-time Signal Processor for Coherent Doppler Wind Lidar Based on FPGA |
| 中文摘要 | 为了利用相干激光测风雷达实时获得探测风场，设计了一种基于FPGA(Field Programmable Gate Array)的相干激光测风雷达实时信号处理器。对相应的信号处理算法进行了分析，提出了利用Verilog硬件实现全部算法以及利用Verilog硬件和Nios II CPU软件实现相结合的信号处理方法，指出了优化的快速傅里叶变换方法，用Verilog设计了频谱变换模块、累加平均模块和求取峰值模块等算法，对于求取峰值等对时间要求不苛刻的算法，还利用Altera公司提出的SOPC(System On a Programmable Chip)技术，通过集成Nios II处理器以及自定义FIFO(First In First Out)外设等，用C语言实现了该算法，并对这两种实现方式进行了分析比较。实验结果表明，该信号处理器能够满足相干激光测风雷达对信号处理器的需要。利用FPGA实现整个信号处理算法，具有硬件容易升级，灵活度高等特点。本论文详细的介绍了基于Verilog硬件描述语言实现的补零、快速傅里叶变换、累加平均等模块，同时还论述了基于SOPC builder的SOPC系统的设计，并介绍了相应的Nios II CPU上软件的设计。 |
| 英文摘要 | In order to achieve real-time detection of wind field based on the coherent Doppler wind lidar, a real-time signal processor based on FPGA(Field Programmable Gate Array) has been developed. Analysis of the corresponding algorithm has been carried out and two kinds of signal processing method are put forward which implement the entire algorithm using Verilog or combine the Verilog hardware implementation with the Nios II software implementation. Later an optimized fast Fourier transform is pointed out. Also the spectrum transform, accumulation average and peak finding modules are designed using Verilog HDL. The peak finding algorithm which is not demanding on the time is also implemented using C language by the SOFC(System On a Programmable Chip) of Altera which integrates Nios II processor and custom FIFO(First In First Out) peripherals. Finaly the two kinds of implementation are analyzed and compared. Tests show that the signal processor can meet the requirement of coherent Doppler wind lidar. Using FFGA, the processor is flexible and easy to upgrade. This paper details the zero-padding module, fast Fourier transform module and accumulation average module which are designed using Verilog ,also the design of SOPC system based on the SOPC builder is discussed and the Nios II CPU software design is presented. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16821]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 张勇成. 基于FPGA的相干激光测风雷达实时信号处理技术研究[D]. 中国科学院上海光学精密机械研究所. 2011. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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