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A satellite-ground communication system and method

A communication system and communication method technology, applied in the field of satellite-to-earth communication systems, can solve the problems of multiple devices, complex structures, and complex implementations, and achieve the effect of increasing data transmission capacity and broad application prospects

Active Publication Date: 2019-04-16
INST OF DONGGUAN TONGJI UNIV
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Problems solved by technology

[0005] The problem existing in the above disclosed prior art is that the current research is mainly focused on using the orbital angular momentum of the laser for communication, the spiral phase plate method, the phase holography method, the mode converter method composed of cylindrical lenses, etc. to generate vortex beams. The implementation of the method is relatively complicated, and in the realization of beam orbital angular momentum state multiplexing, many devices are used, the structure is complex, and it is not easy to be small and integrated, so it is not suitable for satellite use
Moreover, optical communication technology also has many restrictions on the transmission environment. For example, the laser satellite-ground link is much more affected by the rainfall, smoke and fog in the atmosphere than microwave

Method used

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  • A satellite-ground communication system and method
  • A satellite-ground communication system and method
  • A satellite-ground communication system and method

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Embodiment Construction

[0048] Hereinafter, specific embodiments will be described according to the accompanying drawings.

[0049] The satellite-ground communication system includes satellite and ground systems.

[0050] For reconnaissance satellites, the uplink data flow is mainly the control commands issued by the ground control system, and the downlink data flow is mainly the data obtained by the remote sensing observation equipment on the satellite, so the amount of downlink data is much higher than the amount of uplink data. One feature, the present invention adopts different communication modes for uplink and downlink.

[0051] The ground system mainly includes two parts: the ground control system and the ground receiving system. The ground control system is responsible for manipulating and controlling the satellite, using 2.2GHz to 2.3GHz transmission channels, including uplink remote control channel and downlink telemetry channel. The ground receiving system mainly refers to the ground recei...

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Abstract

The invention relates to the satellite-to-ground communication, and particularly relates to a system and a method which use the vortex wave beam to perform satellite-earth communication. The satellite-to-ground communication method comprises steps of performing coding modulation on multipath signals, choosing a vortex wave beam mode, and generating vortex wave beams which are mutually orthogonal through phased array elements according to a field distribution of the vortex wave beam of a certain mode; and the vortex wave beam is radiated to a distributed ground antenna array through vacuum and air transmission mediums for the distributed ground antenna array to receive and process signals. The satellite-to-ground method expands available bandwidth for satellite-to-ground signal transmission and improves confidentiality.

Description

technical field [0001] The invention relates to a satellite-ground communication system and method, in particular to a system and method for satellite-ground communication using vortex beams. Background technique [0002] The uplink and downlink phased array antennas developed by Northrop Grumman for the first advanced extremely high frequency (EHF) military satellite communication payload have been installed on the first flight structure, and the antenna performance (and together with other basic load components) pass the inspection. Advanced EHF satellites use phased array antennas, advanced microelectronic systems, extremely high data rate waveforms, and high-efficiency schemes to significantly improve capacity and connectivity compared to the "Military Star" system. The capacity of the Advanced EHF satellite is 10 times that of the "Military Star" system, and the data transmission rate is 6 times higher. The phased array antenna for advanced EHF loading includes an upl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0408H04B7/06H04B7/185
CPCH04B7/0408H04B7/0617H04B7/185
Inventor 李宏强魏泽勇武超徐弼军
Owner INST OF DONGGUAN TONGJI UNIV
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