A New Radar-Embedded Communication Waveform Based on Singular Value Decomposition

As a new competitive technology, radar-embedded communication (REC) can achieve the covert communication while improving the spectrum utilization. The embedded communication waveform has always been the core of REC. Traditional waveform design methods use eigen-decomposition to construct REC waveforms after converting research targets. However, the constructed REC waveforms are not orthogonal, which would reduce the communication reliability. Besides, converting targets would affect the low probability of detection (LPD) performance of REC. To solve these problems, this paper proposes a new waveform design method based on singular value decomposition (SVD). We compare the proposed method with the traditional ones in terms of communication reliability, LPD performance and robustness. Analysis and simulation results show that the SVD waveform generated by the proposed method is better than the traditional REC waveforms. We also provide a method to measure the level of similarity between SVD waveform and radar waveform. Then we can adjust the similarity to control the trade-off between reliability and concealment.