Indoor Event Detection with Eigenvector Spanning Signal Subspace for Home or Office Security
Indoor Event Detection with Eigenvector Spanning Signal Subspace for Home or Office Security
复制标题
用于家庭或办公室安全的特征向量跨越信号子空间的室内事件检测
DOI：
10.1109/vetecf.2008.46
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
T. Ohtsuki
中科院分区：
文献类型：
--
作者：
S. Ikeda;H. Tsuji;T. Ohtsuki
本文提出了一种利用电波的室内事件检测方案，例如侵入家庭或办公室。所提出的系统利用在接收器侧的天线阵列，并使用由天线阵列获得的特征向量所跨越的信号子空间来检测入侵等事件。特征向量不是基于接收信号强度（RSS），而是基于天线阵列上入射信号的到达方向（DOA）。因此，在静态下，特征向量随时间的方差小于RSS。特征向量仅在感兴趣的室内环境静态或动态改变时改变。由于室内电波的反射和衍射，探测范围大，只需一对发射机和接收机，安装成本低。实验结果表明，该方法可以区分无事件发生时的状态和有事件发生时的状态。与基于RSS的事件检测方法相比，该方法具有上级的检测性能。
This paper proposes an indoor event detection scheme using an electric wave such as intrusion into home or office. The proposed system exploits an antenna array on the receiver side and detects events such as intrusion using signal subspace spanned by eigenvector obtained by the antenna array. The eigenvector is not based on received signal strengths (RSS) but on the direction of arrival (DOA) of incident signals on an antenna array. Therefore, in a static state, the variance of the eigenvector over time is smaller than that of RSS. The eigenvector changes only when the indoor environment of interest changes statically or dynamically. The installation cost is low, because the detection range is wide owing to indoor reflections and diffraction of electric wave and only a pair of transmitter and receiver are used. Experimental results reveal that the proposed method can distinguish the state when no event occurs and that when an event occurs clearly. The proposed method has a superior detection performance to the event detection method based on RSS.