CDR系统的组帧模块FPGA设计与仿真  

FPGA Design and Simulation of Framing Module Based on CDR System

作　　者：陈冬英[1] 魏建崇 CHEN Dong-ying;WEI Jian-chong(College of Electronic Information Science,Fujian Jiangxia University,Fuzhou 350108,China;College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350108,China)

机构地区：[1]福建江夏学院电子信息科学学院,福建福州350108 [2]福建师范大学光学与信息工程学院,福建福州350108

出　　处：《三明学院学报》2021年第3期70-77,112,共9页Journal of Sanming University

基　　金：福建江夏学院科研人才培育项目(JXZ2019009);福建江夏学院教育教学改革项目(J2020B017);福建省中青年教师教育科研项目(JAT190466)。

摘　　要：以低时延、高效率的数字音频广播应用需求为牵引,围绕其物理层关键技术,对当下中国调频频段数字音频广播系统(CDR)中的帧形成模块进行研究与设计。利用CDR标准中有效子载波与虚子载波的填充方式,实现了一种灵活的组帧设计方法,使频谱资源得到灵活的配置。综合运用FPGA中ModelSim和MATLAB仿真软件对级联后的系统进行验证,两者具有一致性,所有特性均符合CDR标准的特征,同时可根据所需的站台及覆盖要求来选择不同频谱模式。由此表明,CDR频谱模式具有灵活性,实现了AM/FM的数字频段兼容性。In order to meet the requirements of low delay and high efficiency digital audio broadcasting applications,the frame forming module in China’s FM band digital audio broadcasting system(CDR) is researched and designed focusing on the key technologies of physical layer. In this design, a flexible framing method is designed according to the filling method of effective subcarriers and virtual subcarriers in the CDR standard so that the spectrum resources can be flexibly configured. The cascaded system is verified by comprehensive use of FPGA ModelSim and MATLAB simulation software:the two are consistent, all characteristics are in line with the characteristics of the CDR standard, and different spectrum modes can be selected according to the required stations and coverage requirements. The experimental results show that the CDR spectrum mode is flexible and achieves AM/FMdigital frequency band compatibility.

关 键 词：中国调频频段数字音频广播 组帧 有效子载波 FPGA 

分 类 号：TN934.2[电子电信—信号与信息处理]