›› 2012, Vol. 25 ›› Issue (3): 101-.

• 论文 • 上一篇    下一篇

基于LDPC的MIMO卫星扩频通信系统

王忱,仰枫帆   

  1. (南京航空航天大学 电子信息工程学院,江苏 南京 210016)
  • 出版日期:2012-03-15 发布日期:2012-03-21
  • 作者简介:王忱(1987—),男,硕士研究生。研究方向:信道编码及卫星MIMO通信。仰枫帆(1966—),男,教授,博士生导师。研究方向:数字通信及编码技术。

LDPC-Based MIMO Satellite Spreading Communication Systems

 WANG Chen, YANG Feng-Fan   

  1. (School of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
  • Online:2012-03-15 Published:2012-03-21

摘要:

MIMO即多输入多输出通信技术,因其可以增大信道容量,而被广泛应用于各类通信系统中。在卫星通信系统中应用MIMO技术,主要面临同道干扰和噪声两个问题。文中介绍了克服同道干扰的MIMO卫星通信线性检测系统,并为解决上述问题,在输入端引入扩频技术和接近香农极限的LDPC编码,而在输出端进行解扩和译码,既减小了同道干扰,又明显削弱了噪声,从而实现了良好的性能。

关键词: MIMO, LDPC, 扩频, 线性检测, 卫星通信

Abstract:

MIMO technique,namely the multiple-input-multiple-output technique,is widely used in various communication systems as it can enlarge channel capacity.In satellite communication systems,there are mainly two problems,co-channel interruption and noise,confronting MIMO application.In this paper,the MIMO linear detection system used in satellite communications aiming at overcoming co-channel interruption is introduced.Spreading and the Shannon-limitation-approaching LDPC encoding are introduced at input,while at output dispreading and decoding are done.Thus,both the co-channel interference and noise are significantly reduced and a good performance for this system is reached.

Key words: MIMO;LDPC;spreading;linear detection;satellite communications

中图分类号: 

  • TN958