Study on the key technology of ghost imaging based on orthogonal frequency division multiplexing

Abstract

This paper studies and analyzes the principle of orthogonal frequency division multiplexing (OFDM) and ghost imaging. On the basis of studying the mechanism of OFDM, this paper further studies ghost imaging technology to uncover the imaging mechanism of ghost imaging using OFDM. The main purpose is to reconstruct ghost imaging by using the spread spectrum principle of OFDM and to verify the signal-to-noise ratio and anti-interference ability of the ghost imaging system based on OFDM. The spatial distribution and spectrum of different modulation matrices and the reconstruction results are analyzed in detail. In the algorithm of ghost imaging based on OFDM, an orthogonal matrix is used as the modulation matrix, and, using the orthogonal property of this matrix, the reconstruction signal can be solved only if the receiving end strictly matches the sending ortho-intersection matrix. From the detailed analysis of the spatial distribution, spectrum, and reconstruction results of different modulation matrices, it is concluded that the signal-to-noise ratio and anti-interference capability of the ghost imaging system based on OFDM are improved by combining the technology advantages of OFDM. The significance is to theoretically promote the development of information communication.