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.
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)
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)。
关键词
跳频
Δ∑调制
数字信号处理
正交幅度调制
frequency hopping
delta-sigma modulation
digital signal processing
quadrature amplitude modulation
