【作者】 冉剑峰；

【导师】 宋茂强；

【作者基本信息】 北京邮电大学 ， 软件工程， 2010， 硕士

【摘要】 软件无线电接收机既具有通用性和开放性特点,又具有标准化和网络化的优势,且系统容易实现自适应跟踪滤波、数字多模式解调、侦察接收以及自适应抗干扰等功能,在军事等通信领域具有广泛的应用前景。本文提出了基于PC上位机+FPGA下位机的高速信号模式识别平台设计方案。完成了下位机硬件平台电路设计与调试、上位机控制软件开发、上位机与下位机USB通信接口及驱动程序开发以及上位机与下位机通信协议设计等工作。其中,上位机主要完成用户交互、信号模式识别以及同构USB与下位机通信等功能,下位机则主要实现信号的高速采样、数字下变频、数据采集、多模式数字解调以及通过USB与上位机通信等功能。下位机处理器采用了Xilinx公司的Virtex-4型SX-55专用信号处理FPGA。上位机用户交互界面采用LabVIEW软件设计,USB驱动及固件程序由C代码开发,识别算法采用Matlab软件实现。该平台利用PC机代替常用软件无线电接收机中的嵌入式系统平台,具有处理速度高、性能稳定、扩展性好、算法升级扩展容易、应用范围广等优点。文中在分析PSK类信号和FSK类信号特征的基础上,提出了PSK、FSK类信号的识别算法,并进行了仿真分析,仿真结果表明所提出的识别算法是有效可行的,最后基于MATLAB与LabVIEW接口,设计了控制软件信号识别算法。更多还原

【Abstract】 Software radio receiver which has both universal and open characteristics, but also has the advantages of standardization and networking, and the receiver based SDR can easily accomplish the adaptive tracking filter, digital multi-mode demodulation, and adaptive anti-jamming detection features, etc, has been used widely in the military communication.This paper presents a modulation recognition system composed of PC and FPGA hardware signal process platform, and completed the design and test of hardware platform, the design of control software based on PC, and USB communication interface driver. In the system, PC machine completes the program of user interaction, signal modulation recognition and communication with hardware platform by USB interface. The hardware platform has the function of high-speed analog-digital conversion, digital down conversion, data acquisition, multi-mode data demodulation and communication with the host computer through the USB interface which use the SX-55 FPGA belong to Xilinx for signal processing. The control software for user based on PC is design by LabVIEW, and USB driver and firmware code is developed by the C, recognition algorithm are developed in Matlab. The system for software radio receiver has the advantages of high processing speed, stable performance, good scalability, and algorithm updating easily, and widely application.In this paper, proposed PSK, FSK type signal recognition algorithm after analysis the characteristic of PSK type signal and the FSK type signal, simulation results show that the proposed recognition algorithm is feasible and effective. In the last, designing the signal recognition algorithm in control software based on MATLAB and LabVIEW interface.更多还原