Inter-satellite terahertz communication system architecture and information transmission method thereof

Abstract

The invention discloses an inter-satellite terahertz communication system architecture which comprises a transmitter and a receiver which are arranged on a satellite platform. When a terahertz frequency range is a low frequency band smaller than 10THz, the transmitter adopts a huge-amount terahertz antenna array; when the terahertz frequency range is a high frequency band of 10THz to 30THz, the transmitter is a terahertz laser; when the terahertz frequency range is the low frequency band or the high frequency band, the receiver is a huge-amount terahertz antenna array; the huge-amount terahertz antenna array comprises 104 to 107 magnitude orders of antenna array elements; the huge-amount terahertz antenna array is made by a semiconductor process, and a plurality of antenna array elements working at different wavelengths are achieved by utilizing the same process, thereby achieving a multi-frequency MIMO (Multiple Input Multiple Output) system; and after the receiver receives a terahertz wave, information is extracted by a detection quantum device, and the same detection quantum device is driven by adopting a plurality of antenna array elements. The system architecture disclosed by the invention fuses the advantages of infrared laser communication and millimeter wave communication.

Description

technical field [0001] The invention relates to a novel transceiver system structure for inter-satellite communication based on the terahertz frequency band. Background technique [0002] Traditional inter-satellite links mainly rely on microwave communication technology and laser communication technology. In order to meet the increasing data volume requirements of inter-satellite communication in space, the microwave bandwidth has been continuously improved. For example, the operating frequency of the inter-satellite link of the new generation of military satellite communication system in the United States has reached 60GHz. However, the huge problem faced by microwave communication is space link attenuation, and the characteristic of inter-satellite communication is ultra-long distance. Due to the coherence of laser light, the space laser communication method basically has no path attenuation compared with microwave. However, the divergence angle of the laser beam used i...

AI Technical Summary

Problems solved by technology

However, the divergence angle of the laser beam used in long-distance laser communication is very small. In practical applications, the jitter of the space platform up to tens of μrad will affect the optical transmitting or receiving antenna of the space laser communication system installed on the platform, causing it to wobble.

When this swing is serious, it will interrupt the space laser communication, and more often it will increase the bit error rate of the laser communication system and reduce the communication quality.

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