摘要
基于调频连续波(Frequency Modulated Continuous Wave, FMCW)的双功能雷达通信(Dual-Functional RadarCommunication, DFRC)系统具有时频利用率高、抗多普勒性能强、距离旁瓣低的特点。现有的FMCW-DFRC波形系统产生双功能性能恶化,并增加通信接收机的链路复杂度。设计了一种基于延迟断点映射(Delayed Breakpoint Mapping, DBM)FMCW的DFRC系统,通过啁啾周期内延迟断点位置的映射和被分割的簇间的相位进行数据调制。通信接收端在载波混频和欠采样后,在数字域实现去啁啾、码片对齐和数据解调,极大降低了接收端生成相干信号和ADC性能的需求。在雷达处理链路中,设计了断点区域删除与拼接(Breakpoint Area Deletion and Splicing, BADS)方案,使DFRC的雷达性能与无调制的FMCW一致。仿真结果表明,与无补偿的方案相比,BADS方案距离图像的副瓣幅度减小约37 dB,且不受调制数据的影响。与现有基于啁啾波形的DFRC方案的通信性能相比,DBM-FMCW降低了约3 dB误符号率。
Dual-Functional Radar-Communication(DFRC)system based on Frequency Modulated Continuous Wave(FMCW)has the characteristics of high time-frequency utilization,strong anti-Doppler performance and low range sidelobe.The existing FMCW-DFRC waveform designs generate dual-function deterioration and increase the link complexity of communication receivers.A DFRC system based on Delayed Breakpoint Mapping(DBM)-FMCW is designed to modulate data by mapping the location of the delayed breakpoint in the chirp period and the phase between the divided clusters.After carrier mixing and undersampling,dechirping,chip alignment and data demodulation are realized in the digital domain.In the radar processing link,a Breakpoint Area Deletion and Splicing(BADS)scheme is designed to make the radar performance of DFRC consistent with that of unmodulated FMCW.The simulation results show that,compared with the uncompensated scheme,the BADS scheme can reduce the sidelobe amplitude of the image by about 37 dB and is not affected by the modulation data.Compared with the communication performance of existing DFRC schemes based on chirped waveform,DBM-FMCW reduces the symbol error rate.
作者
徐瑞
文瑞铭
黄子涵
李钢
文光俊
XU Rui;WEN Ruiming;HUANG Zihan;LI Gang;WEN Guangjun(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;School of Infomation and Software Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2024年第2期210-218,共9页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(61971113,61901095,62371106)
国家重点研发计划(2018AAA0103203)
广东省重点领域研究发展计划(2019B010141001)
四川省科技规划项目(2022YFG0230,2023YFG0040)。
关键词
啁啾信号
双功能雷达通信
调频连续波
旁瓣抑制
欠采样
chirp signal
dual-functional radar-communication
frequency modulated continuous wave
sidelobe suppression
undersampling
