The Research On Spaceborne Intelligence Network Element Based On High-performance DSP

At present,the satellite industry is booming.But in terms of the current development of satellite,there are two problems:(1)the technology of the traditional large satellite that is current widely used is complex,and the cycle is long;the function curing,unable to meet the growing user's needs.(2)the navigation,communications and other satellite systems that have formed nowadays do not achieve networked,the interoperability is poor,can not meet the current Internet's requirements.For the first question,the modern small satellite was born,modern small satellites using modular design technology,research and development cycle is short;payload design that is based on software has good flexibility,so it can be better to make up for the traditional big satellite's defects.On the basis of modern small satellites,in order to solve the above two problems at the same time,this paper combines modern small satellite and Internet of Things,and calls the intelligent modern small satellite which can enter the Internet as spaceborne intelligent network element,which leads to this article's basic problem: How does the spaceborne intelligent network element build on the project? Based on the basic problem,the paper puts forward the following key technical problems under the premise of analyzing the characteristics of intelligent network elements:(1)Research on Intelligent Network Element Architecture.In order to shorten the development cycle,Intelligent Network Element uses the modular design.In order to meet the requirements of a variety of payload structure,its structure need have wide adaptability,and requiring the standard bus to dynamically identify the insertion of the functional modules to achieve plug-and-play function.The intelligentization of intelligent network elements is mainly embodied in its spatial reconfigurability,that is,according to the location of the space where the different tasks,the implementation of different tasks,which requires intelligent network elements to achieve self-task planning,so the paper need to research on intelligent network element's scheduling.The above-mentioned modularity,plug-and-play and task scheduling need to study the architecture of intelligent network elements.(2)Realization of USB transponder based on Intelligent Network Element.USB transponder is an improtant spaceborne equipment.In order to validate the Intelligent Network Element,the application of USB transponder is realized in the Intelligent Network Element in the paper.The signal processing of USB transponder is studied.(3)Implementation of Spread Spectrum Receiver based on Intelligent Network Element.Spread spectrum communication is an important means of interstar communication,and spread spectrum receiver realizes the demodulation of the signal.The paper studies the signal demodulation algorithm.The three technical problems are studied in this paper,and the system structure is verified by the prototype.The USB transponder algorithm and the Spread Spectrum Receiver algorithm is verified.The results agree with the theory.