文档介绍：西安邮电大学
毕业设计(译文)
论文题目: 基于多相滤波器组及瞬时测频技术的高效
         带宽数字接收机研究                 
院(系): 通信与信息工程学院
专业: 电子信息科学与技术
班级: 电科0903班
学生姓名:
导师姓名: 职称: 讲师   
PARISON OF ANALOG FRONT END ARCHITECTURES
FOR DIGITAL RECEIVERS
Holly Pekau Student Member, IEEE, University of Calgary TRLabs e-mail:******@
James W. Haslett Fellow, IEEE, University of Calgary TRLabs
e-mail: ******@
Abstract
Radio receivers that perform analog to digital conversion closerto the antenna and do most of the signal processing in the digital domain are known as digital receivers. Digital receivers aredesirable because they can be more easilyre-configured for multista- dard operation, they can facilitate performance improvementsby using digital filters for signal processing, and they can potentia- lly realize savings in chip area, power consumption and cost. The definition of a digital receiver is general and there are several types of receiver architectures that fall into this category. Digitalreceiver architectures which have been proposed include direct RFNyquist sampling, RF bandpass sampling or sub-sampling, directIF Nyquist sampling, and IF bandpass sampling orsubsamp- pares these digital receiver architectures in various categories including susceptibility to aperture jitter and aperturedistortion, noise figure degradation due to aliasing, ease of anti-aliasing filter implementation, ease of ADC implemen- tation, linearity, power consumption, chip area, and re-configurability. System and circuit level simulations using mercial RF simulator are performed to pare the different digital receiver architectures in some of the aforementioned categories. Thefeasibility of using the proposed digital receiver architectures forvarious standards is then examined and a survey of published digital receiver architectures is presented.
Keywords: Digital receiver, software radio, sub-sam
1 Introduction
The increasing demand for flexible multi-standard, multi-bandradios increase