Millimeter-wave orbital angular momentum communication device and method based on radio-over-optical technology

Abstract

The invention discloses a device and a method for millimeter-wave orbital angular momentum communication based on a radio over fiber technology. The device comprises an eight-channel optical millimeter-wave phase modulation link, an annular transmitting antenna array and an annular receiving antenna array. The millimeter-wave communication capacity and the spectrum utilization ratio are greatly improved by taking the orbital angular momentum as a new information bearing dimension. The millimeter-wave orbital angular momentum modulation is moved from the electric domain to the optical domain by using the radio over fiber technology, thereby realizing high-speed modulation for the millimeter-wave orbital angular momentum. Millimeter-wave orbital angular momentum signals are radiated to the free space and received and demodulated by using the antenna arrays. The millimeter-wave orbital angular momentum communication system disclosed by the invention breaks through defects of low speed, complex demodulation, low efficiency and the like of traditional orbital angular momentum modulation, has the advantages of radio over fiber communication, can realize long-distance transmission of millimeter-wave orbital angular momentum information by using optical fibers, can expand a traditional wireless demodulation technology so as to realize demodulation for the millimeter-wave orbital angular momentum, and ensures the convenience of the system.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a millimeter-wave orbital angular momentum communication device and method based on radio-over-optical technology. Background technique [0002] Millimeter waves, especially high-frequency millimeter waves, have developed rapidly in the field of communication in recent years due to their advantages of high bandwidth, little influence from clutter, and good electrical shielding. When high-frequency millimeter waves are transmitted in the atmosphere, due to the absorption of water vapor and oxygen molecules in the atmosphere, the energy is greatly attenuated. For the millimeter wave band, the total bandwidth reaches hundreds of GHz or more, and the frequency bands of 60GHz, 75-110GHz, 120GHz and greater than 300GHz are open frequency bands without the need to apply for a radio license because they correspond to atmospheric absorption peaks. Compared with 60GH...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a millimeter-wave orbital angular momentum communication device and method based on radio-over-optical technology in view of the deficiencies of the prior art, which can solve the problem of orbital angular momentum damage caused by single-mode optical fibers. The momentum transmission channel is limited to space and a specific Vortex fiber, and the modulation speed of the orbital angular momentum state is slow, and the high-speed loading of the signal cannot be achieved

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