高技术通讯2011，Vol.21Issue(9)：974-978,5.DOI:10.3772/j.issn.1002-0470.2011.09.015
新的高镜像抑制比DAB接收机射频前端架构的研究
Research on a new topology of RF front-end with a high image-rejection ratio for digital audio broadcasting receivers
摘要
Abstract
A new architecture of radio frequency (RF) front-end with the high image-rejection ratio (IRR) performance for digital audio broadcasting (DAB) receivers is presented in this paper. It adopts the image-rejection topology of double quadrature direct downconversion-upconversion frequency. The receiver is firstly double-quadrature downconverted to zero-intermediate frequency(zero-IF) and then up-converted to 2.048MHz IF finally. The zero-IF has the advantage of high integration, and the IRR of double quadrature topology is insensitive to the mismatch of quadrature signals. The theoretical analysis and system simulation show that the proposed architecture decreases the sensitivity of IRR versus the phase and gain mismatch of the high frequency part in the first stage. It improves the performance of image-rejection ratio greatly.关键词
数字音频广播(DAB)/射频前端/失配/镜像抑制比(IRR)Key words
digital audio broadcasting (DAB)/RF front-end/mismatch/image-rejection ratio (IRR)引用本文复制引用
徐建,王志功,牛小康,江汉..新的高镜像抑制比DAB接收机射频前端架构的研究[J].高技术通讯,2011,21(9):974-978,5.基金项目
国家自然科学基金(61106024),中国博士后科学基金(2009001048)和科技部中小企业技术创新基金(11C26213211234)资助项目. （61106024）
