Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TF3
Session:
Number:3TF3-2
MIMO Sensor ? Effectiveness of distributed MIMO antenna configuration ?
Kentaro Nishimori, Yuta Koide, Naoki Honma, Daiki Kuwahara, Hiroyoshi Yamada, Hideo Makino,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Reliable security systems have been recently attracted much attention. To realize this, the microwave sensor using existing signals, such as wireless LAN, TV broadcast signals and so on, have been studied. Moreover, intruder detection using array signal processing is proposed [1]. In this method, Single Input Multiple Output (SIMO) channel is assumed and the variation on the eigenvector, which is obtained by the correlation matrix of the received signal, is utilized as a cost function of the event detection. However, since the value of cost function in this method is very high, the detection accuracy greatly depends on signal to noise ratio (SNR). This paper proposes the intruder detection method which utilizes the eigenvectors for both transmitter and receiver site, when using Multiple Input Multiple Output channel. We call this method as MIMO Sensor. Although the channel capacity on the MIMO transmission is severely degraded in time variant channels [2], we use this feature as an underhanded way in the MIMO Sensor. We propose the use of time correlation function for the transmitting and receiving eigenvectors in the MIMO channel. Moreover, we evaluate the effectiveness of proposed method by using an actual indoor environment. In particular, we clarify the effectiveness of distributed antenna configuration using the measured data.