宽带卫星通信系统动态信道化技术研究  

Dynamic Channelization Technology of Wideband Satellite Communication System

作　　者：陈祝允 沈忠良[1] 郭道省[1] 

机构地区：[1]中国人民解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信技术》2017年第2期199-204,共6页Communications Technology

基　　金：江苏省自然科学基金(No.BK20141069)~~

摘　　要：针对宽带卫星通信系统用户业务类型多样、子带信号动态范围大的特点,在研究现有信道化接收技术的基础上,分析了余弦调制信道化滤波器组的高效实现结构。考虑宽带卫星通信系统的星上处理转发需求,提出一种基于STFT功率谱局部累加量的动态信道化接收算法,在各用户信号频带分布信息未知的情况下,实现了宽带卫星通信盲信道化处理。最后,定义信道化处理的性能指标,通过计算机仿真验证所提算法的有效性,从而为新一代星载柔性转发器的设计提供理论参考。In view of multiple user service types and large dynamic range of sub-signals in wideband satellite communication system and based on the research of existing channelization receiving technology, an efficient implementation structure of cosine modulated channelization filter-banks is analyzed, In consideration of the on-board processing and transponding reguirement, a dynamic channelization algorithm based on calculating the sum of STFT power spectrum by segment is proposed, which could realize the blind channelization without spectrum information of sub-signal in wideband satellite communication. Finally, the performance index of channelization is defined, and the computer simulation indicate the correctness of the above-mentioned method, thus providing certain theoretical reference for the design of a new-generation flexible satellite transponder.

关 键 词：宽带卫星通信 信道化 余弦调制滤波器组 STFT 

分 类 号：TN911.3[电子电信—通信与信息系统]