DCT Scheme in LOS Propagation Based on UCA
Ke Gao, Wenchi Cheng, Jingqing Wang · 2024
As the demand for higher transmission rates in next-generation wireless communication continues to rise, the imminent challenge of spectrum resource scarcity becomes pronounced. Orbital angular momentum (OAM) has garnered significant attention due to their orthogonal beam structures. OAM introduces multiple topological charges or OAM modes, enabling the orthogonal multiplexing of beams without relying on traditional resources such as time and frequency. However, for space wireless communications, the paramount importance of reliability presents significant challenges to the deployment OAM wireless communications. In this paper, we propose the discrete cosine transform (DCT) scheme, which is a kind of highly reliable OAM based wireless communications. First, we build the system model of the DCT based UCA for light of sight (LOS) propagation. Then, we derive a formula expression for the DCT scheme. Subsequently, we analyze the corresponding capacity and received bit error rate. Simulation results validate that DCT scheme is more reliable than traditional multiple-inputs multiple-outputs (MIMO) and OAM.