基于正交时频空调制的雷达嵌入式通信方法

doi:10.7527/S1000-6893.2025.32546

Abstract

Abstract:

To address the issue of the sharp decline in reliability of Radar-Embedded Communication （REC） over doubly selective fading channels， an Orthogonal Time-Frequency-Space （OTFS） modulation based REC method is proposed. First， REC is integrated with OTFS to enable the application of OTFS in REC communication systems through model construction and transceiver module design. Second， a communication information embedding method based on anti-interference pilot design is proposed， which significantly improves the information carrying efficiency of REC communication. Third， a reception method combining waveform matching and symbol detection is developed， which effectively enhances communication reliability while maintaining the anti-interception performance of the waveform. Simulation results demonstrate that the proposed method achieves excellent Signal Error Rate （SER） performance below 10^-2 under Signal-to-Clutter Ratio （SCR） lower than -25 dB， demonstrating excellent bit error rate performance. This work provides valuable insights for enhancing the feasibility of REC technology in future engineering applications.

Key words: radar-embedded communication, doubly selective fading channel, orthogonal time-frequency-space modulation, communication reliability, anti-interception performance

CLC Number:

V241

Baoguo LI, Jiulin ZENG, Xu LU. Radar-embedded communication based on orthogonal time-frequency-space modulation[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(6): 332546.

Figures/Tables 19

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Table 1

Settings for REC communication signals and transmission channel parameters

参数	符号	数值/类型
奈奎斯特采样点数	$N$	200
过采样因子	$M$	2
载波频率/GHz	$f c$	8
子载波间隔/kHz	$Δ f$	25
符号数	$N s y m b o l$	50
子载波数	$K$	4
信道多径数目	$L$	5
多径效应等效信道		莱斯信道
莱斯因子/dB	K-factor	0
收发双方相对速度集合（预设 $K$ 组）/（m·s^-1）	$v$	［0，100，200，250］
最大多径时延/ $μ s$	$t d e l a y$	2.5
预先经过的调制方式		BPSK

Table 1

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Radar-embedded communication based on orthogonal time-frequency-space modulation

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[1]	Cheng’an ZHANG, Baoguo LI, Xiang WANG, Qiang XU. Radar-embedded communication waveform design with low complexity [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(1): 326471-326471.
[2]	LI Baoguo, ZHANG Cheng'an, XU Jianqiu. A radar-embedded communication waveform design method based on SVD [J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(7): 325401-325401.