基于软件无线电中频信号的数字化接收解调研究

【作者】 郑剑泉；

【导师】 曹杰；

【作者基本信息】 南京航空航天大学 ， 通信与信息系统， 2003， 硕士

【摘要】 近年来，功能可编程化的软件无线电技术倍受关注。软件无线电的业务种类、工作速率、接口类型、工作频率、加密方式均可以灵活改变，随着更高速度的AD和DSP器件的出现，软件无线电必将得到广泛的应用。 本论文系统阐述了软件无线电的体系结构和工作原理，重点论述了按照软件无线电的要求所构建的硬件的结构，以及软件的设计。该硬件采用专用的数字下变频器HSP50214B实现对数字信号的下变频，然后送至DSP处理，并通过计算机并口将结果送至计算机。通过对采集到的数据进行频谱监控分析其特征，相应的采用不同的软件加载到DSP中实现对各种不同信号的解调。 本论文对输入的调频和调幅信号的解调进行了具体的分析。通过进一步的软件优化，该硬件同样适合接收其他类型的信号。更多还原

【Abstract】 Recent years ?as communications technology continues its rapid transition from analog to digital, more functions of contemporary radio systems are implemented in software - leading toward the software radio. A software radio is a radio whose channel modulation waveforms are defined in software. The part using software radio increases flexibility via increased programmability. And in part software radio represents an ideal consideration in radio architectures that seek to balance standards compatibility, technology insertion and the compelling economics of today’s highly competitive marketplaces.This thesis expatiated on the fundamental and the frame of software radio, and mainly discusses the design and research of a software radio receiver .It introduces the hardware and software of the receiver in detailed. The receiver uses a PDC(programmable downconverter)of HSP50214B to transform the A/D output high speed signal into a low speed signal in order that a lower speed DSP can deal with . DSP output demodulation results are displaying in computer via Parallel Port which working in EPP mode. It can also operate many other types signal through the spectrum management.This thesis analyzes the AM and FM signal and give a actual realization of software radio receiver. It can become an perfect receiver through software optimized .更多还原