MAC层的自适应扩展频谱技术研究  

Research on Adaptive Spread Spectrum on MAC Layer

作　　者：穆宏涛[1] 

机构地区：[1]桂林电子科技大学,广西桂林541004

出　　处：《现代电子技术》2008年第9期29-30,34,共3页Modern Electronics Technique

摘　　要：以往的扩展频谱技术都是以固定的扩频比进行通信,系统将所有节点同等看待,势必造成无线带宽资源的分配不合理。特别是在高干扰的情况下,平均分配带宽资源很有可能使所有节点都无法正常通信,所以引入扩频比的自适应调节技术是非常必要的。介绍了自适应扩展频谱技术的概念,指出其在高干扰情况下的优越性,提出基于自适应扩频技术的多址接入协议,并描述其在MAC层的实现。Former spread spectrum system always work with a fixed coefficient,and all the nodes are equalization, it must be avoidless that the distribution of the source of wireless bandwidth is improper. Especially,in the case of the interference is severe,any node couldntt communicate,if the source of the wireless bandwidth is alloted averagely,so it is necessary that the coefficient of each node in the spread spectrum s;stem adapts itself to its wireless communication circumstance. This paper introduces the concept of adaptive spread spectrum technology, then it presents the advantage in the case of the interference is severe, and it introduces the multiple access protocol for adaptive spread spectrum, then it describes its implementation in the MAC layer.

关 键 词：MAC层 自适应 扩展频谱技术 多址接入协议 

分 类 号：TN919.3[电子电信—通信与信息系统]