高速星间收发通信机OFDM调制解调研究  

Research on OFDM modulation and demodulation of high speed inter satellite transceiver

作　　者：王彦革 武加纯 张瀚青 张康雷 殷鹏程 WANG Yange;WU Jiachun;ZHANG Hanqing;ZHANG Kanglei;YIN Pengcheng(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《空间电子技术》2023年第1期70-75,共6页Space Electronic Technology

基　　金：上海航天电子技术研究所自主研发项目基金(编号:DZS-ZY-2018-19)。

摘　　要：目前,国内外针对卫星组网的研究主要集中在卫星之间的星间链路研究方向。为实现卫星组网通信系统中大数据量的信息交互,首次提出了一种利用正交频分复用(orthogonal frequency division multiplexing,OFDM)技术的高速星间收发通信机的设计方案。相比传统单载波技术,OFDM技术凭借其较高的频谱利用率、良好的抗多径干扰能力以及能够灵活分配资源等特有的优势,可用于实现星间通信的高码速率传输。首先设计了星间收发通信机的总体架构,基于星间通信系统的特点以及16QAM调制解调方式的优点进行了相关的参数设计,然后根据设计参数,采用Verilog HDL硬件描述语言基于ISE开发平台和Modelsim软件完成了16QAM数字调制解调功能和时序的仿真,验证了设计的可行性。首次将OFDM技术应用到星间收发通信机,为其硬件实现奠定了基础,具有一定的参考价值。At present,the studies of satellite networking mainly focus on the Inter-Satellite Link at home and abroad.In order to realize the massive data interaction in the inter-satellite networking communication system,a design scheme of high-speed inter-satellite transceiver using orthogonal frequency division multiplexing(OFDM)technology is proposed for the first time in this paper.Compared with traditional single carrier technology,OFDM technology can be used to realize high bit rate transmission of inter-satellite communication due to its unique advantages such as higher frequency spectrum utilization,better anti-multipath interference ability and flexible resources allocation.In this paper,the overall architecture of the inter-satellite transceiver is designed firstly,and relevant parameters are designed based on the characteristics of inter-satellite communication system and the advantages of 16QAM modulation and demodulation mode.Then,according to the design parameters,the simulation of the 16QAM digital modulation and demodulation function and timing is completed by using Verilog HDL hardware description language based on ISE development platform and Modelsim software,which verifies the feasibility of the design.In this paper,OFDM technology is applied to inter satellite transceiver for the first time,which lays the foundation for its hardware implementation and has certain reference value.

关 键 词：OFDM 高速 收发通信机 调制解调 

分 类 号：V443[航空宇航科学与技术—飞行器设计]