多信道无线系统中时频机会频谱接入改进算法  

Improved Time-frequency Opportunistic Spectral Access Algorithm for Multi-channel Wireless Systems

作　　者：王玉博[1] 王呈贵[2] 李超[1] 黄蒙蒙[3] 于海莉[4] 

机构地区：[1]解放军理工大学通信工程学院研究生3队 [2]解放军理工大学通信工程学院 [3]中国人民解放军94906部队 [4]中国人民解放军73681部队

出　　处：《军事通信技术》2013年第3期58-62,72,共6页Journal of Military Communications Technology

摘　　要：在一个多信道无线通信系统中,节点可以通过控制包的交互过程探测各无线信道,机会地利用拥有高传输效率的信道,而信道探测过程会消耗用于真正数据包传输的时间和能量。文中详细介绍了最优停止时间理论的基本原理,分析了该理论在慢衰落环境下的局限性,并通过引入有限状态马尔可夫信道模型,提出了一种时频二维的机会频谱接入算法。In a multichannel wireless communication system, nodes can probe channels through the exchange of control packet so as to opportunistically exploit channels with high quality. But the probing progress consumes resource, such as time and energy, which ean be used to transmit data packets. The basic principle of optimal stopping problem was introduced. To deal with the limitation of the theory under slow fading environment, the finite-state Markov channel model was iutrodueed, and a time-frequency opportunistic access algorithm proposed.

关 键 词：机会接入 马尔可夫链 多速率 

分 类 号：TN929.5[电子电信—通信与信息系统]