无DAC全数字跳频系统  

DA C-free All Digital Frequency Hopping System

作　　者：陈云鹏 高亮 宋春奇 黄珍梅 CHEN Yunpeng;GAO Liang;SONG Chunqi;HUANG Zhenmei(Southwest China Research Institute of Electronic Equipment,Chengdu Sichuan 610036,China)

机构地区：[1]西南电子设备研究所,四川成都610036

出　　处：《通信技术》2024年第12期1311-1317,共7页Communications Technology

基　　金：国家自然科学基金(62331013)。

摘　　要：提出了一种无数模转换器(Digital to Analog Converter,DAC)的全数字跳频(Frequency Hopping,FH)系统。通过Δ∑调制(delta-sigma modulation,DSM),数字域中的FH模拟信号可以被转换为比特序列,然后通过I/O端口传输。与传统的模拟载波跳频系统相比,该系统具有较低的复杂度和较高的频率选择灵活性。与现有的数字基带跳频系统相比,全数字FH系统更容易在数字信号处理(Digital Signal Processing,DSP)中实现DSM,而不是利用高采样率DAC。实验通过正交幅度调制(Quadrature Amplitude Modulation,QAM),在20 km光纤和1 m无线链路上成功实现了2.4 GHz、3.5 GHz、3.51 GHz和5.5 GHz的跳频信号的发送和接收。In this paper,an all-digital FH(Frequency Hopping)system without DAC(Digital to Analog Converter)is proposed.By implementing DSM(Delta-Sigma Modulation),FH analog signals in the digital domain can be converted into bit sequences,which can then be transmitted through I/O ports.Comparing with conventional analog carrier FH systems,the proposed system features lower complexity and higher flexibility in frequency selection.Compared to existing digital baseband FH systems,the all-digital FH system is easier to achieve DSM in DSP(Digital Signal Processing)rather than utilizing a high sampling rate DAC.In the experiment,FH signals at 2.4GHz,3.5GHz,3.51GHz and 5.5GHz,modulated by QAM(Quadrature Amplitude Modulation),are successfully transmitted and received over 20km optical fiber and 1m wireless link.

关 键 词：跳频 Δ∑调制 数字信号处理 正交幅度调制 

分 类 号：TN919[电子电信—通信与信息系统]