数据采集与处理2025，Vol.40Issue(6)：1445-1463,19.DOI:10.16337/j.1004-9037.2025.06.006
面向通感一体化的跳频线性调频信号设计与检测方法
Design and Detection of Frequency-Hopping LFM Signals for ISAC Systems
摘要
Abstract
To cope with the challenges of low communication rate and susceptibility to interception of sensing-centric waveforms in integrated sensing and communication(ISAC)systems,this paper designs a multi-channel frequency-hopping transmission architecture based on quadrature phase shift keying(QPSK)and linear frequency modulation(LFM)signals.This architecture transmits multiple LFM signals simultaneously within overlapping spectral bands to enhance the symbol rate.Encrypted communication is achieved by the frequency-hopping characteristics of the LFM subcarriers.Furthermore,the time-division multiplexing(TDM)mechanism of dynamic preambles and data improves the accuracy of path indexing and parameter estimation for multi-path LFM signals.Simulation results show that under identical symbol rate constraints,the proposed multi-channel parallel architecture achieves superior bit error rate(BER)performance compared to traditional single-channel schemes.Specifically,the BER of the four-channel architecture at 0 dB SNR is reduced by one order of magnitude relative to the single-channel scheme.Additionally,the dynamic preamble scheme meets the requirements for path index identification across various scenarios.At 0 dB SNR,the normalized mean square error(NMSE)remains below 10-2.Furthermore,both the proposed symbol demodulation algorithms achieve a BER below 10-2 at 0 dB SNR in their respective scenarios.Moreover,the frequency hopping mechanism significantly enhances the system's anti-intercept capability.Even with 50%parameter leakage,the probability of accurate recovery(PAR)of signal parameters by the third parties remains suppressed below 7%,validating the robustness and application value of the solution.关键词
通感一体化/正交相移键控-线性调频信号/非相干离散啁啾傅里叶变换/最小均方差联合检测算法/串行干扰消除联合检测算法分类
信息技术与安全科学引用本文复制引用
申紫璇,谢磊,郭明..面向通感一体化的跳频线性调频信号设计与检测方法[J].数据采集与处理,2025,40(6):1445-1463,19.基金项目
南京理工大学紫金学院校级科学研究项目(2025ZRKX0401009) （2025ZRKX0401009）
江苏省高等学校基础科学(自然科学)研究面上项目(25KJD510005). （自然科学）
