数字接收机模拟信道和ADC的匹配设计  

The Matching Design of Analog Down-conversion and ADC of Digital Receivers

作　　者：吴永欣[1] 冀祯[1] 党立华[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2008年第6期58-60,共3页Radio Engineering

摘　　要：灵敏度和动态范围是数字接收机的2个重要性能。从这2项性能的定义出发,分别阐述了接收机设计中提高灵敏度和动态范围的措施,但二者相互矛盾。因此,结合灵敏度和动态范围的计算公式对数字接收机模拟信道和ADC的匹配设计进行了理论分析和计算,通过一具体接收机设计实例得出一组计算结果,并对计算结果进行了必要地说明。为接收机设计人员在接收机设计和指标分配时提供了一定的设计依据。Upon the definition of sensitivity and SFDR, which are two important performances of digital receivers, the article introduces how to improve them. But there is illogicality between the two performances, so some theoretical analysis and calculation are made to make the analog frequency down-converters to match with the ADC. Finally, a series of results are obtained through an example of an actual digital receiver, and some necessary explanations are made. Through the article, the designers can obtain some useful reference in the design of digital

关 键 词：数字接收机 ADC 灵敏度 动态范围 

分 类 号：TN914[电子电信—通信与信息系统]