计算机应用 ›› 2012, Vol. 32 ›› Issue (03): 808-811.DOI: 10.3724/SP.J.1087.2012.00808

• 网络与通信 • 上一篇    下一篇

衰落信道对无线传感器网络决策融合的影响分析

肖蕾,张志峰   

  1. 空军工程大学 导弹学院,陕西 三原 713800
  • 收稿日期:2011-07-06 修回日期:2011-11-25 发布日期:2012-03-01 出版日期:2012-03-01
  • 通讯作者: 肖蕾
  • 作者简介:肖蕾(1982-),女,江西南昌人,博士研究生,主要研究方向:管理科学与工程;张志峰(1960-),男,陕西礼泉人,教授,博士生导师,博士,主要研究方向:武器装备管理。

Impact of fading channel on decision fusion in wireless sensor networks

XIAO Lei, ZHANG Zhi-feng   

  1. Missile Institute, Air Force Engineering University, Sanyuan Shaanxi 713800, China
  • Received:2011-07-06 Revised:2011-11-25 Online:2012-03-01 Published:2012-03-01

摘要: 户外环境监测中的无线信道非常复杂,受到多径衰落和噪声等多重因素的影响,严重降低了信号的接收质量。对衰落信道特性的深入研究,有助于网络更好地接收信号,提高系统检测性能。详细分析了信道衰落的影响因子,研究了衰落信道下信号的传输性能,仿真了衰落信道对无线传感器网络检测概率的影响,得出了决策融合中节点上传决策的最佳位数。仿真结果表明,衰落信道下的检测概率较理想信道有较大差距,且上传一位决策值是最佳融合策略。

关键词: 衰落信道, 决策融合, 无线传感器网络, 检测概率

Abstract: Wireless channel of monitoring the outdoor environment is very complex, and gets impacted by many factors such as multipath fading and noise, which deteriorates awfully the quality of signal reception. Further research on fading channel is helpful for receiving better signal and improving system performance. The factors of impacting fading channel were analyzed in detail, and the transmitting performance with fading channel was researched. The impact of fading channel on the probability of system detection was simulated, and the multi-bit local decisions in decision fusion with fading channel were researched. The simulation results suggest that the probability of system detection is lower compared to non-fading channel, and the sensor transmitting a bit decision is optimal.

Key words: fading channel, decision fusion, Wireless Sensor Network (WSN), detection probability

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