雷达嵌入式通信(REC)是一种在雷达后向散射回波中嵌入通信信号的新型隐蔽通信手段,相较于传统的隐蔽通信方式,REC具有更加优越的隐蔽性能,在军事和民用领域都有着非常广阔的应用前景。波形设计一直是REC中的重点研究目标,为了更好的通信可靠性和抗截获性能,提出了一种基于奇异值分解(SVD)的REC通信波形设计方法,给出了SVD波形设计的算法原理,并对SVD波形的通信可靠性、抗检测性能、抗截获性能和算法复杂度进行了仿真和分析。结果表明:相较于传统的REC波形,SVD波形可以实现完全正交,并且与雷达回波信号局部上分离、同时保持整体上的相似,具有更好的通信可靠性、低检测概率特性(LPD)和低截获概率特性(LPI),同时没有显著增加算法复杂度。
Radar-Embedded Communication(REC) is a new type of covert communication method that embeds communication signals in radar backscattered echoes. Compared with the traditional concealed communication method, REC has superior concealment performance, and thus has very broad application prospects in the military and civilian fields. Waveform design has always been a key research goal in REC. To improve communication reliability and anti-interception performance, a REC communication waveform design method is proposed based on Singular Value Decomposition (SVD). This paper presents the algorithm principle of SVD based waveform design, and analyzes the communication reliability, anti-detection performance, anti-interception performance and algorithm complexity of the SVD waveform. The results show that compared to the traditional REC waveform, the SVD waveform has better communication reliability, Low Probability of Detection (LPD) and Low Probability of Intercept (LPI), and does not cause a significant increase of algorithm complexity.
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