中文摘要：

针对无线传感器网络能量受限的特点,将信号源数目估计算法和无线传感器网络拓扑结构结合起来,提出了一种基于决策级融合的多簇协作无线传感器网络信号源数目估计算法,并且在LEACH分簇算法的基础上提出了一种新的基于节点剩余能量簇头选择算法。首先对传感器网络分簇,各簇独立进行信号源数目估计,产生本地判决结果;然后在融合中心对各簇的判决结果进行融合得到对信号源数目的估计值。仿真结果表明本文提出的信号源数目估计方法和簇头选择算法能够在保证估计可靠性的前提下有效降低网络传输能耗,延长网络生存周期。

英文摘要：

In view of the characteristic of the energy constraint of the wireless sensor networks, a method is proposed for the estimation of the number of signal sources in wireless sensor networks, which is based on clustering and decision-level data fusion. And a new cluster head selection algorithm based upon nodes＇ residual energy is proposed. In the method proposed in this paper, the first is to divide the sensor networks into clusters with each cluster independently working on the estimation of the number of signal sources so as to generate the final results. Secondly, the results from each cluster at the fusion center are fused to obtain the estimates of the number of signal sources. The simulation results demonstrate that the methods of estima- ting the number of signal sources and cluster head selection algorithm proposed in this paper can efficiently reduce energy con- sumption for network transmission, and increase network life on the premise that the reliability of the estimation is ensured.