Space network on-demand access system

Abstract

The invention provides spatial network on-demand access system architecture. By using the architecture provided by the invention, the defects that a traditional access system is slow in signal capturespeed, poor in hardware expansibility and high in coupling between software can be solved. The spatial network on-demand access system architecture is implemented via the technical scheme as follows:a multi-beam former performs beam forming on an input array signal according to azimuth information issued by a master monitoring computer, Doppler prior information is acquired via satellite orbit information, digital signals formed by the output Doppler information after spatial filtering are enabled to form into a TCP / IP data packet to be transmitted to a TCP / IP route switching unit, and the TCP / IP data packet is forwarded to a specified receiver unit; the receiver unit performs de-framing, synchronization, demodulation and decoding on a UDP data packet in combination with the Doppler information issued by the master monitoring computer, and forwards the decoded data packet to a frame formatter of a slave monitoring computer to extract data in the TCP / IP data packet, and the data is transferred to a system management and scheduling unit after framing to be distributed to a terminal user putting forward a task application.

Description

technical field [0001] The invention relates to a space high-speed backbone network constructed with tracking and data relay satellites and broadband communication satellites as the core, and a space information access network composed of special satellite systems such as remote sensing information acquisition and meteorological environment monitoring. It relates to the field of satellite communication and utilizes Geostationary orbit satellites are used as transponders to enable aircraft at any location to communicate with end users at fixed locations on the ground. [0002] technical background [0003] At present, location service applications based on wireless communication network and mobile positioning technology are more and more concerned and valued by the industry and become the hot spot of current information competition. There are many types of spatial location services, and information services based on spatial location provided by a single technology cannot reall...

AI Technical Summary

Problems solved by technology

[0011] 1. For low-orbit aircraft, the speed near the ground often reaches several kilometers to more than ten kilometers per second. The relatively large moving speed leads to a very large Doppler introduced. The result is: 1. When the computing resources are small, The signal access time is very long, which is not conducive to user experience and multi-user scheduling, and the interruption time is also very long during synchronous satellite handover; 2. In order to make the signal access time short, a large number of computing resources are required for parallel operation. It is not conducive to the unitization and chipping of the receiver, which further increases the cost

[0012] 2. The data path composed of optical fiber switching matrix or single-pole multi-throw switch is based on physical devices, which is not only expensive, but also occupies a large volume. In the environment of increasing processing capacity, channel expansion is difficult

Under such conditions, the disadvantages of digital chips in terms of reconfiguration are highlighted, and they do not have the characteristics of software defining everything.

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