Zhipeng Li, Qing Zhang, Xin Wen, Fengzhong Qu, Yan Wei
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引用次数: 0
Abstract
Orbital angular momentum mode-division multiplexing (OAM-MDM) communication has great potential to increase the data transmission rate and reduce the signal processing complexity in the field of underwater acoustic communications. However, the OAM signals suffer from the influence of multipath leading to the data streams unable to be separated. In addition, the inconsistency of transducers will destruct the OAM mode purity, and decrease the effective degree of freedom of underwater acoustic OAM-MDM. Here, we derive the wavefront of the OAM signals to analyze the underwater acoustic OAM-MDM under ideal conditions. The decision-feedback equalizer (DFE) is exploited to mitigate the multipath and the inconsistency of transducers causing inter-mode interference of the underwater acoustic OAM-MDM. The theoretical analysis is verified by both simulations and experiments.
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