卫星宽带柔性转发器中交换系统的设计研究与硬件实现

发布时间：2018-04-15 06:16

本文选题：宽带柔性转发器 + 多相滤波器组　；参考：《南京理工大学》2015年硕士论文

【摘要】：随着通信体制由传统向现代转型发展,卫星通信在全球通信系统中已起到举足轻重的作用[1]。初期的卫星通信体系是由单星构成,随着美国率先使用多星星座进行数据通信,卫星通信系统开始逐渐由单业务、单波束、单频点向复杂任务、多波束、宽频段、多信道发展[2]。这种发展趋势促使了柔性转发器的产生。作为一种能实现宽带信号在轨重构与柔性转发的卫星载荷设备,柔性转发器既具有弯管式转发器的灵活性,又具有再生式转发器对系统资源的高利用率。本文提出了一类新型的数据转发星上载荷设备的设计方法。它同时具有将宽带数据信道化,以及利用交换网络对信道化后数据进行透明转发的能力,称之为宽带柔性转发器。该转发器参考了美军的“WGS”星座上的转发器技术,并借鉴多相滤波器组技术设计实现了星上多路宽带信号的分析和综合,利用电路交换技术实现了多路信道化后信号之间任意频段、任意波束、任意子带之间的交换。论文重点研究了宽带柔性转发器中的交换系统,利用高速数据处理技术与“T-S-T”数字交换网络结构设计了整个交换系统。在硬件方面选用了Xilinx公司生产的Virtex4系列芯片设计系统的实现方案,过程中使用了包括Serdes高速接口在内的多种内核编写Verilog HDL程序,采用Modelsim对程序进行前仿真。与此同时也在Matlab上对“T-S-T”路由算法进行仿真验证。最后将设计出的硬件成品与其他外围设备联合调试,分析联合调试中所获得的结果可以对整个设计方案的功能与性能进行验证。论文最后对全文做出总结,在现有研究内容与成果的基础上,提出了作者将来的研究方向和期望。
[Abstract]:With the development of communication system from traditional to modern, satellite communication has played an important role in global communication system.The initial satellite communication system was composed of single satellite. With the first use of multi-star constellation for data communication in the United States, satellite communication system began to develop gradually from single service, single beam, single frequency point to complex mission, multi-beam, broadband band, multi-channel development [2].This kind of development trend promoted the production of flexible transponder.As a kind of satellite payload equipment which can reconstruct and transmit wideband signals in orbit, flexible transponder has not only the flexibility of curved tube transponder, but also the high utilization ratio of regenerative transponder to system resources.In this paper, a new design method of onboard load equipment for data forwarding is presented.It also has the ability of channelization of broadband data and transparent forwarding of channelized data using switching networks, which is called wideband flexible transponder.The transponder refers to the transponder technology of the "WGS" constellation of the US military, and uses the polyphase filter bank technology to design and synthesize the multi-channel broadband signal on board.The circuit switching technique is used to realize the switching of any frequency band, any beam and any sub-band between signals after multichannel channelization.The switching system in the wideband flexible transponder is studied in this paper, and the whole switching system is designed by using the high-speed data processing technology and the "T-S-T" digital switching network structure.In the aspect of hardware, the design scheme of Virtex4 series chip system produced by Xilinx company is selected. In the process, many kinds of kernel including Serdes high speed interface are used to write Verilog HDL program, and Modelsim is used to simulate the program.At the same time, the "T-S-T" routing algorithm is simulated on Matlab.Finally, the designed hardware is debugged jointly with other peripheral equipments, and the results obtained in the joint debugging can verify the function and performance of the whole design scheme.At the end of the paper, the author's future research direction and expectation are put forward on the basis of the existing research contents and achievements.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN927.2

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