【摘要】 软件无线电的中心思想是构成一个具有开放性、标准化、模块化的通用的硬件平台,通过加载相应的软件就可实现不同平台、不同系统之间的互联和兼容,是通信系统摆脱了硬件系统结构的束缚。进行了matlab的算法仿真之后,采用ALTERA公司的CycloneIIIFPGA芯片作为数字信号处理的核心器件,考虑到带宽、采样率、分辨率因素,选择ADS5547作为中频数字化前端的ADC部件,用VerilogHDL语言对该平台进行了设计开发。在硬件平台上完成了A/D采样,数字解调输出等部分,实现了调频和调幅广播的解调,验证了该硬件平台的正确性,而且系统具有灵活性、可重置性和可扩展性。更多还原

【Abstract】 The central theme of Software Radio is to achieve the interconnection or compatibility between different platforms or systems by using relative softwares,which helps communication systems free from the restrain of the structure of hardware systems.The author simulates the demodulation algorithm in MATLAB,then uses Cyclone III FPGA made by ALTERA for digital signal processing,cooperating with the ADC module,ADS5547,in consideration of the requirement of bandwidth,sampling rete and resolution rate.The author designs this platform by using Verilog HDL language.This design completes A/D converting and digital demodulation.To test this system,the author puts FM and AM broadcast signal into this system for demodulation,and the results certify the correctness of this design.The system possesses not only the flexibility and re-configurability,but also scalability.更多还原