基于软件无线电的宽带数字中频接收机研究

Techniques of undersamping research based on software radio

分析了基于软件无线电的宽带数字中频接收机中的关键技术-带通采样下变频技术、数字下变频技术、多速率处理技术,并实现了欠采样技术条件的软件系统仿真。由此可见,在现有条件下实现宽带数字中频接收机是可行的。

This paper discusses key technology in the digital intermediate frequency receiver with wide band based on software radio, including down-converter on condition of band-pass-sampiing, digital down-converter, multi-rate digital signal processing, band-pass signal decimating, and achieves software system simulation based on under-sampling. As what is concluded from the above that it is practicable to design the digital intermediate frequency receiver with wide band at present.