Ultra-narrow-band communication transmission system and transmission method for orbital angular momentum microwave quantum
An orbital angular momentum and transmission system technology, applied in the field of electromagnetic wave orbital angular momentum quantum state, can solve problems such as narrow bandwidth and phase asynchrony, and achieve the effect of improving frequency band utilization and information transmission rate
Active Publication Date: 2021-11-02
TSINGHUA UNIV
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And it overcomes the problem of phase asynchrony between different OAM modes, making it occupy a very narrow bandwidth in the frequency domain, making this method have a very high frequency band utilization
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[0071] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0072] Such as figure 1 As shown, an ultra-narrowband communication transmission system 10 of orbital angular momentum microwave quantum includes an ultranarrowband signal source 100, an ultranarrowband signal generation module 200, an ultranarrowband signal receiving module 300, and an ultranarrowband signal recovery and analysis module 400.
[0073] The ultra-narrowband signal source 100 includes a signal excitation source 101 and an OAM microwave quantum generating unit 102, which are used to generate OAM microwave quantum in different modes. The signal excitation source 101 is located outside the OAM microwave quantum generation unit 102 and provides the ori...
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The invention discloses an ultra-narrow-band transmission system and transmission method for orbital angular momentum microwave quantum. In the system, an ultra-narrow-band signal source generates OAM microwave quantums of different modes, a mode combination selection unit determines a mode form, an information keying unit switches the OAM microwave quantums of the mode corresponding to current information in a mode keying form, and loads original information to OAM microwave quanta in different modes; a phase synchronization unit reduces a phase difference value during OAM microwave quantum modal number switching; an ultra-narrowband signal receiving module receives the OAM microwave quantum carrying the ultra-narrowband signal and converts the OAM microwave quantum into a signal of which the OAM mode can be identified or sorted; and an ultra-narrowband signal recovery and analysis module determines a corresponding OAM mode by identifying and sorting received signals, and recovers original information. According to the invention, ultra-narrowband information transmission based on vortex OAM microwave quantum can be realized without complex devices, the occupancy rate of traditional frequency domain resources can be reduced, and the frequency band utilization rate and the channel capacity are improved.
Description
technical field [0001] The invention relates to the technical field of electromagnetic wave orbital angular momentum (Orbital Angular Momentum, OAM) quantum state, in particular to an ultra-narrowband information transmission system and transmission method based on microwave quantum of orbital angular momentum. Background technique [0002] According to the classical electrodynamic theory, electromagnetic radiation carries both linear momentum and angular momentum, where angular momentum is composed of spin angular momentum (Spin Angular Momentum, SAM) and orbital angular momentum (Orbital Angular Momentum, OAM). In 1909, Poynting theoretically predicted the mechanical effect of electromagnetic field angular momentum; in 1992, Allen et al. experimentally verified the existence of electromagnetic wave orbital angular momentum (OAM) in the light wave band. In the radio band, S.M.Mohammadi et al. proposed the use of a circular antenna array to generate electromagnetic waves wit...
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IPC IPC(8): H04B10/70H04B10/61H04B10/50H04B10/079H04L27/20H04L27/22
CPCH04B10/70H04B10/6165H04B10/50597H04B10/07953H04L27/2096H04L27/223Y02D30/70
Inventor 张超吴秋里
Owner TSINGHUA UNIV