用于全数字发射机的数字上变频电路  

Digital up-converter circuit for all-digital transmitter

作　　者：叶海鸿[1] 苏凯雄[1] 吴林煌[1] 翁义龙[1] YE Haihong SU Kaixiong WU Linhuang WENG Yilong(College of Physics and Information Engineering, Fuzhou University, Fuzhou, Fujian 350116, China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350116

出　　处：《福州大学学报（自然科学版）》2016年第5期649-655,共7页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省产学重大项目(2015H6014);福建省发改委科技创新基金资助项目(闽发改投资[2014]168号);福建省发改委2014年产业技术联合创新专项资助;福州市科技项目计划资助(市校合作;编号:2015-G-61)

摘　　要：通过分析数字上变频器系统的工作过程及其主要参数对输出信噪比的影响,合理设计差分电压、预加重电路和高速串行发送器等的布局,有效提高数字上变频电路的性能.实际仿真和硬件测试表明,所设计的数字上变频器可将基带信号直接上变频到907.2 MHz频率上,实现阻带衰减达35 d B,提高了发射端信号的有效性和准确性,可以满足全数字发射机的应用要求.By means of analysing the digital up-converter system working principle and the effect of principal parameters on the output of signal to noise ratio,and reasonable designing differential voltage,pre-emphasis circuit and high-speed serial transmitter etc,improving the performance of digital up-converter circuit effectively. The actual simulation and hardware test show that,the digital up-converter designed in this paper achieves the function,that is,up-convert the base band signal to the frequency of 907. 2 MHz,with stop-band attenuation to 35 d B,also,increase effectiveness and accuracy of the signal of transmitter,which can meet the application requirement of all-digital transmitter.

关 键 词：全数字发射机 数字上变频器 DELTA-SIGMA调制器 高速串行发送器 

分 类 号：TN911[电子电信—通信与信息系统]