全数字化接收机是实现软件无线电技术的重要基础，本文研究基于可编程四通道数字下变频器HSPS0216实现高频地波雷达数字接收机设计的若干关键技术。重点讨论了如何利用HSPS0216实现数字信号的抽取滤波以降低信号速率，并以远程高频地波雷达为例分析了HSPS0216进行抽取滤波的实现效果。实验证明，HSPS0216大大提高了接收系统的灵活性，同时也提高了系统的技术指标。

The fully digitalized receiver is the important basis for software radio. Some key technologies about how to realize the HF ground wave radar receiver based on the HSP50216 are addressed. First, the function of the four channel digital programmable down-converter HSP50216 is introduced. Then, the structure of HF ground wave digital IF receiver and how to use the HSP50216 in it are analyzed. The emphasis is placed on how to use the HSP50216 to decimate the over-sampled signal and filter the out of band signal. Last, experimental results about using the HSP50216 in a far-distance HF ground wave radar show that it improves the receiver system's flexibleness and performance greatly.

TN957.5

国家“8 63”计划重大项目 ( 2 0 0 1AA63 10 5 0 )，国家教育部科学技术研究重点项目 ( 0 1114 )