一种NR无线小站的同步设计与实现  

Synchronous Design and Implementation of A NR Wireless Station

作　　者：杜明玉 徐红波 艾峰 DU Mingyu;XU Hongbo;AI Feng(Wuhan Hongxin Telecommunication Technologies Co.,Ltd.,Wuhan 430001,China)

机构地区：[1]中信科移动通信技术股份有限公司,湖北武汉430001

出　　处：《移动通信》2021年第6期120-124,共5页Mobile Communications

摘　　要：通过介绍一种无线通信产品,讲述了一种空口同步的实现方法,在主控端输入的通信信号通过数字采样转换后,逻辑处理器FPGA先通过5G同步模块获取开关信息。得到开关信息后,先将开关信号进行差分编码和扩频,脉冲成形滤波,并插值混频后,送至DAC通过空口发送到分布式单元。分布式单元对前传接收的空口通信信号进行解扩,恢复出时分开关信号,然后再通过一些数字同步技术如扩频跟踪、相位校准、时钟恢复调教,用于调整vcxo的频率,从而实现与主单元和分布式单元主控之间的频相同步。This paper introduces a wireless communication product and describes a method of realizing air port synchronization.After the communication signal input from the main control terminal is converted by digital sampling,the logic processor FPGA obtains the switch information through 5 g synchronization module.After obtaining the switch information,the switch signal is first sent to the DAC and sent to the distributed unit after differential coding and spread spectrum,pulse shaping filtering,and interpolation mixing.The distributed unit de spreads the air port communication signal,recovers the time division switch signal,and then adjusts the frequency of VCXO through some digital synchronization technologies,such as spread spectrum tracking,phase calibration and clock recovery adjustment,so as to realize the frequency and phase synchronization between the main unit and the main control unit of the distributed unit.

关 键 词：5G NR 主单元 分布式单元 同步 锁相环 时钟恢复 扩频码 PN编码 

分 类 号：TN92[电子电信—通信与信息系统]