陈爱新1,
王学锋2,
陈远航2,
刘晓滨2,
姚宜东2
1.北京航空航天大学 北京 100191
2.北京航天控制仪器研究所 北京 100094
基金项目:中国航天科技集团公司科技研发项目(天科研[2017]893号)
详细信息
作者简介:李文：男，1988年生，博士生，研究方向为无线通信、数字信号处理
陈爱新：男，1970年生，教授，博士生导师，研究方向为天线设计、电磁兼容
王学锋：男，1974年生，研究员，博士生导师，研究方向为无线通信、光纤传感
陈远航：男，1977年生，研究员，研究方向为卫星通信
刘晓滨：男，1981年生，高级工程师，研究方向为卫星通信、计算机网络
姚宜东：男，1984年生，高级工程师，研究方向为天线设计、射频电路
通讯作者:李文 liwen5658@buaa.edu.cn
中图分类号:TN929.531计量
文章访问数:297
HTML全文浏览量:84
PDF下载量:20
被引次数:0
出版历程
收稿日期:2019-10-16
修回日期:2021-01-24
网络出版日期:2021-02-02
刊出日期:2021-04-20
Design of Novel Automatic Gain Control for Multi-service Low-bit Rate Digital Radio-over-Fibre System
Wen LI1, 2,,,Aixin CHEN1,
Xuefeng WANG2,
Yuanhang CHEN2,
Xiaobin LIU2,
Yidong YAO2
1. Beihang University, Beijing 100191, China
2. Beijing Institute of Aerospace Control Devices, Beijing 100094, China
Funds:The Innovation Research and Development Project of China Aerospace Science and Technology Corporation ([2017]893)
摘要
摘要:带通采样和数字信号处理技术使得数字光载射频(DRoF)通信系统在射频信号传输中具有显著优势，而且系统通过进一步采用数据压缩技术可实现多服务信号的低比特率传输。然而，系统进行数据压缩的同时会极大降低输入动态范围。基于对数据压缩参数的理论分析，该文提出一种新型快速两级自动增益控制(FST-AGC)算法。该算法采用周期内多阈值判定机制来调整链路增益，具有高稳定、准确和快速响应等特性。通过在数字域和模拟(RF)域进行两级自动增益控制，系统的输入动态范围大大提高。该算法被成功应用到能够同时支持3家移动运营商(MONs)所有服务的多服务低速率DRoF系统中。理论计算、软件仿真和系统测试结果都验证了该算法具有显著优势和良好性能。该算法可应用在其他各种新型网络通信系统中，如物联网(IoT)、射频识别(RFID)和未来的5G通信系统。
关键词:数字光载射频通信系统/
自动增益控制/
数据压缩/
快速响应
Abstract:Taking the advantage of the parallel development of electronic sampling systems and signal processing, Digital Radio-over-Fiber (DRoF) is studied extensively as a way of providing multi-service transmission at low-bit rate through data compression. However, the dynamic range is greatly lowered after data compression in the system. Based on the theoretical analysis of the compression parameters, a novel Fast-Settling Two-stage Automatic Gain Control (FST-AGC) algorithm is proposed, in which gain adjustment settling is carried out by multi-threshold decision mechanism with a fast-settling times, high stability and great accuracy. By introducing a novel gain control mechanism which simultaneously adjusts the gain in digital domain and Radio Frequency (RF) domain, the dynamic range of the system increases significantly. This algorithm has been applied to a DRoF system which supports the low-bit rate transmission of all services of 3 China Mobile Network Operators (MONs) successfully. The theoretical analysis, the simulation results and the experimental data all prove the validity of the proposed algorithm. Its promising properties and excellent performance enable its potential application to emerging networks, such as Internet of Things (IoT), Radio Frequency Intification (RFID) and the incoming 5G network.
Key words:Digital Radio-over-Fiber (DRoF)/
Automatic Gain Control (AGC)/
Data compression/
Fast-settling
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