Abstract
In order to improve the covertness of radar embedded communication based on the eigenvalue decomposition radar embedded communication waveform design scheme, a new waveform design scheme that combines the idea of shaped design is constructed. In this paper, the background and concept of radar embedded communication are introduced in detail. Three existing waveform design schemes are analyzed. Using de-correlation filter receivers, a weighted waveform design scheme for shaped non-dominant subspace feature vectors is constructed and analyzed. The communication covertness and reliability is illustrated. Both the theoretical analysis and the simulation show that this scheme improves the covertness of communication.
Highlights
Most of the existing stealth technologies use signals that have already existed in the environment
As discussed in the previous chapter, Eigenvectors as communication waveforms (EAW) uses the eigenvectors in non-dominant subspace directly as the communication waveform, and there will be a obvious peak on the spectrum diagram, leading to poor covertness
The higher the communication reliability is,the more it will be received by the cooperative receiver, and it will be more intercepted by the interceptor,so the covertness is poor
Summary
Most of the existing stealth technologies use signals that have already existed in the environment. Radar Embedded Communication (REC) is a stealth communication technology that uses radar backscatter signals to hide communication signals. It has low probability of detection (LPD) and low probability of interception (LPI). The team adopted a radar embedded communication method based on the LFM pulse and proposed three waveform design schemes based on eigenvalue decomposition. Li Baoguo from the National University of Defense Technology proposed a radar embedded communication waveform design method based on a direct-spread-spectrum sequence. It used direct-spreadspectrum sequence to enhance communication reliability [3]. The paper combined CPM and PCFM to embed communication signals into radar signals in [8]
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