Design of Software-Defined Down-Conversion and Up-Conversion: An Overview  

作　　者：Yue Zhang Li-Ke Huang Carsten Maple Qing Xuan 

机构地区：[1]Department of Computer Science and Technology, University of Bedfordshire, UK [2]Aeroflex International Ltd, Stevenage, UK [3]Sino-European-Link Ltd, UK

出　　处：《ZTE Communications》2011年第4期10-14,共5页中兴通讯技术（英文版）

摘　　要：In recent years, much attention has been paid to software-defined radio （SDR） technologies for multimode wireless systems SDR can be defined as a radio communication system that uses software to modulate and demodulate radio signals. This article describes concepts, theory, and design principles for SDR down-conversion and up-conversion. Design issues in SDR down-conversion are discussed, and two different architectures, super-heterodyne and direct-conversion, are proposed. Design issues in SDR up-conversion are also discussed, and trade-offs in the design of filters, mixers, NCO, DAC, and signal processing are highlighted.In recent years, much attention has been paid to software-defined radio （SDR） technologies for multimode wireless systems SDR can be defined as a radio communication system that uses software to modulate and demodulate radio signals. This article describes concepts, theory, and design principles for SDR down-conversion and up-conversion. Design issues in SDR down-conversion are discussed, and two different architectures, super-heterodyne and direct-conversion, are proposed. Design issues in SDR up-conversion are also discussed, and trade-offs in the design of filters, mixers, NCO, DAC, and signal processing are highlighted.

关 键 词：SDR down-conversion UP-CONVERSION DIRECT-CONVERSION super-heterodyne conversion 

分 类 号：TN92[电子电信—通信与信息系统] TU375[电子电信—信息与通信工程]