无线传感器网络中基于衰减信道的决策融合

无线传感器网络中的链路通信质量对上层应用有重要的影响.为此,本文研究了基于衰减信道的多传感器决策融合问题,提出了最优似然比融合规则,并推导出适用于无线传感器网络的二种次优融合规则,最后讨论了相同传感器和相同信道模型下的融合情况.仿真结果表明此方法能比较好的适应在无线传感器网络中信息融合时所遇到的链路衰减和噪声干扰等问题.

Decision fusion transmitted over fading channels in wireless sensor networks

The quality of link communication has a significant impact on upper-layer applications in wireless sensor networks. In this paper, we study the problem of decision fusion transmitted over fading channels by utilizing multiple distributed sensors. We derive an optimal likelihood ratio (LR)-based fusion rule, two suboptimum alternatives are also presented to reduce computation requirements in the low or high signal-to-noise ratio (SNR) channel. Furthermore, we study the fusion statistic under the identical local sensor and the same channel SNR assumption. Finally, a simulation example is given to illustrate the effectiveness of the proposed results.